PRC-320 user manual
Contents
1. UJ UJ UJ dU Pub No M U 007 USER HANDBOOK FOR PRC 320 1 amp PRC 320 1 100W H F SSB RADIO STATIONS Downloaded by RadioAmateur EU 1978 The Plessey Company Limited The information contained herein is the property of The Plessey Company Limited and is not to be disclosed or used either in whole or in part without the prior written permission of The Plessey Company Limited Issued by THE PLESSEY COMPANY LIMITED PLESSEY AVIONICS amp COMMUNICATIONS ILFORD ESSEX 161 4AQ ENGLAND Telephone 01 478 3040 Telex 23166 FIRST AID IN CASE OF ELECTRIC SHOCK EXHALED AIR METHOD 1 SWITCH OFF If this is not possible PROTECT YOURSELF with dry insulating material and pull the victim clear of the conductor DON T TOUCH THE VICTIM WITH YOUR BARE HANDS until he is clear of the conductor but DON T WASTE TIME 2 Lay the patient on his back Quickly loosen waist band and clothing round neck If his mouth is open sweep a finger through his mouth to 1 obstruction and remove loose dentures b Lift the head and tilt the head backwards by putting one hand underneath the neck and the other on the crown of the head c Hold the head tilted as far back as possible and lift up the jaw firmly closing the lips This keeps the victim s airway clear by straightening the breathing passage d Take a deep breath Open your mouth2. u 9 OIPOLE ELEMENTS LENGTH FREO LENGTH FREQ LENGTH 2 0 34 0 50 12 0 55 2 2 310 55 14 0 A 75 2 4 28 5 6 0 0 4 2 6 260 6 5 18 0 3 75 2 8 24 5 70 200 35 3 0 23 0 7 220 3 25 3 3 21 0 8 0 24 0 30 36 190 90 26 0 29 4 0 17 0 10 0 28 0 2 4 5 15 0 11 0 30 0 25 Fig 7 ATU Range and Loading and Dipole Elements Tables 24 5 4 MAST Fig 8 page 27 Fig 10 page 51 2 8 The 5 4m mast forms the basis of the 7 9m and 5 5m vertical antennas used for ground wave operation and can also be used as a support for various dipole and end fed antenna configurations It comprises six tubular sections which when fitted together are Supported by three pairs of guys For ease of transport the mast is supplied as a kit 640 1 14979 5820 99 621 9027 containing the following items Mast section assembly section 6 off 640 1 14980 5820 99 621 9017 Guy assembly guy 6 off 640 1 14983 5820 99 621 9018 Stake peg assembly stake 5 off 640 1 14986 4050 99 621 9019 Adaptor mast assembly adaptor 1 off 640 1 14989 5820 99 621 9020 Plate guy guy plate 2 off 640 2 14995 5820 99 621 9021 5 off 640 2 14994 5820 99 621 9022 Plate tie tie plate 1 off 640 2 14995 5820 99 621 9023 Case mast case 1 off 640 4 14996 5820 99 621 9024 2 9 To assemble and erect the mast proceed as follows 2 9 1 Remove all it
3. LHOINM SNOISNHWIG IVNIWON TVNIWON GWVN NOWNOO SWVN WALI Th CHAPTER TWO OPERATING INFORMATION 100W EQUIPMENT 2 1 The main items additional to the basic PRC320 1 station which are required to make up the 100W PRC320 1 100W station are illustrated in Fig 1 Fig 1 100W Equipment T5 INSTALLATION 2 2 The PRC320 1 100W is designed for a wide variety of installations but whatever arrangement of the equipments is adopted they must be sited for ease of access by the operator and in a vehicle installation the PV1515 antenna tuning unit must be located as close as possible to the vehicle whip antenna base length of the 1516 vehicle whip antenna feeder cable is 1m and this length should not be exceeded if other types of vehicle whip antenna are used 2 5 The normal dispostion of the equipments in a vehicle installation is illustrated in Fig 2 which shown the PV1515 and 1511 stacked on the PV1318 and together mounted on the PV1517 The RT320 1 complete with carrier and webbing is mounted alongside on the vehicle rack which if required allows for instant removal of the RT320 1 and its redeployment as a manpack 2 4 The installation procedure for the arrangemment Shown in Fig 2 is as follows 2 4 1 Secure the 1517 to the vehicle frame work or radio mounting table if fitted by means of the resilient mounts 2 4 2 Locate the dowels on the rear flange of the
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5. dtym ATquesse 1 dtym eseq sunids ATquesse aseg suTStaidwoo euueque dtym 9 4 4994 jueudrnbe 0 8 o 8 13 4 uj p 160721 5 2 iddus ug 5 SUTITM SNVN NONWOO SWYN WALI 12 CHAPTER TWO OPERATING INFORMATION BASIC STATION AND ANCILLARY EQUIPMENT 2 1 The items comprising the basic station and its ancillary equipment are illustrated in Fig 2a b c which they are referred to by their common names MANPACK CARRIER Fig 2a Basic Station and Ancillary Equipment 15 nd Ancillary Equipment Fige2b Basic Station a COUNTERPOISE DIPOLE CENTRE JUNCTION Fig 2c Basic Station and Ancillary Equipment 15 ASSEMBLY OF STATION 2 2 Fitting RT220 1 to carrier Fig 3 Proceed as follows 2 2 1 Secure the RT220 1 to the carrier by means of the four captive screws CARRIER RT220 1 Fig 5 Fitting RT320 1 to Carrier 2 5 Connecting battery to RT320 1 Fig 4a amp Proceed as follows 2 5 1 At the RT220 1 turn the transmitter power switch to OFF 2 5 2 Lift
6. 1517 in the holes in the rear flange of the PV1518 and lock the two front panels together by means of M8 screws 2 4 5 Using M5 screws secure the PV1511 to the PV1318 and the PV1313 to the PV1311 by means of the lugs on the underside of the two latter equipments 76 TT eiorueA 1897441 eon 2 4 4 Secure the vehicle rack as described in Part 1 Chapter Three and fit the RT320 1 and its carrier 2 4 5 Remove the coaxial link from the rear of the RT320 1 and interconnect the equipments as Shown in Fig 3 using the RT320 1 coaxial socket labelled T R and the audio socket labelled SKA for connection to the 1511 R F INPUT and rear panel AUDIO connectors respectively The interconnecting cables can be supplied in lengths to suit any installation and those with a minimum Surplus length should be used Note that there are very high r f voltages present at the antenna base and that if an antenna other than the 1516 is used a well insulated heavy duty cable must be used to connect the PV1313 antenna terminal to the antenna The RT220 1 can be powered by its own battery as shown in Fig 2 or by the regulated power supply from the PV1518 as Shown in Fig 3 the former case the battery should be float charged by a 28V d c charging unit DCCU supplied from the vehicle 28V supply 2 4 6 Complete the installation by using the earthing braid to connect the earth terminal on
7. Erection of 5 4m Mast with Wire Antenna Antenna Counterpoise 5 4m Mast with Ground Wave Vertical Antennas Dipole C nfigurations Using Antenna Feeder Cable Examples of Other Dipole Configurations Example of End Fed Antenna Remote Operation Local Rebroadcast Interconnections PRC320 1 with Hand Generator Charging Unit D C Charging Unit Working to Other Radios CHAPTER THREE Vehicle Harness Interface PV1316 Vehicle Whip Antenna Installation in a Vehicle Downloaded by RadioAmateur EU Page xii 13 14 15 16 17 18 19 22 25 24 27 29 51 55 35 36 37 40 41 45 4T 48 51 52 CHAPTER FIVE Fig No 25 24 25 26 2T 28 AM Reception Check AM Transmission Check SSB Reception Check SSB Transmission Check CW Reception Check CW Transmission Check Page 59 60 61 65 xi Fig 1 PRC320 1 Manpack CHAPTER ONE PURPOSE AND PLANNING INFORMATION INTRODUCTION 1 1 The Radio Station PRC320 1 is based on the RT320 1 a simple to operate lightweight trnasmitter receiver operating in the 2 to 50 MHz range with operating frequency selection at 1 kHz intervals The PRC320 1 operates in the SSB AM or CW modes and can be used as manpack ground station or vehicle radio The RT320 1 is fully sealed and operates from clip on 24V secondary battery headset assembly handset and morse key are provided as basic items hand generator a c and d c charg
8. 37 C to 52 C operational 40 C to 75 storage 2 400m operational 7 600m transport Fully sealed withstands immersion to a depth of 1m for 2 hours 20V to 32V d c reverse polarity over voltage protected Receive 150mA Transmit SSB Speech 6A CW 12A 69 CONSTRUCTION 1 7 The ATU is contained in a sealed cast case which is finned to provide efficient convection cooling Connectors for the r f input from the 100W amplifier and signals from the PV1518 control unit are mounted on the front panel and antenna and earth terminals are mounted on the rear panel 1 8 The 100W amplifier is of similar appearance and construction with one audio and one supply connector on the rear panel and all controls indicators and remaining connectors on the front panel Lugs on the bottom and threaded bosses on the top of both this unit and the ATU provide for mounting one on top of the other and for securing to the 1517 or PV1318 mounting trays by means of M5 screws 1 9 The PV1317 provides shock absorbing mounting for the PV1518 ther 100W amplifier or the ATU or a Stacked combination of them 1 comprises a flanged tray of aluminium alloy supported on four resilient mounts second tray similar to that of the PV1518 para 1 10 may also provide a mounting for the RT3520 1 Fixing for the PV1318 or second tray is provided by two dowels on the rear flange which engage with corresponding holes at the r
9. 5 CHECK RT320 1 SUPPLY AND SELECT FREQUENCY Carry out operations 1 and 2 in Fig 6 of Part 1 Chapter Two If RT220 1 supplied from PV1318 and needle below second mark in operation 1 SUPPLY VOLTS too low 4 TUNE ANTENNA TUNING UNIT Press and release Depress and release pressel Amber TUNING lamp lights Extinguished when green READY lamp lights to indicate completion of tuning Repeat tune sequence only when switching on when different frequency selected or when antenna changed If red fault lamp lights fault in antenna system indicated Refer to Chapter Three 5 SELECT MODE AND ADJUST VOLUME Set RT320 1 mode switch to LSB USB or AM for Speech and CW for morse Adjust GAIN control for required volume of received signal 6 OPERATE To select transmit depress pressel when green ACTIVE LAMP will light To receive release pressel ACTIVE lamp extinguished 81 ANTENNAS 2 7 The various types of antenna described in Part 1 Chapter Two can equally be used with the PRC320 1 100W substituting the PV1515 antenna and earth terminals for those of the RT220 1 Where a dipole wire antenna is used in conjunction with a dipole centre junction antenna matching is provided Solely by the lengths of the dipole elements as specified on the case of the RT320 1 PV1515 is then not used and the antenna feeder cable must be connected to the PV1511 R F OUTPUT coaxial socket direct REMOTE O
10. Connecting battery to RT320 1 Assembling Manpack Carrying Position Operating Information Antenna Tuning 5 4 Mast Antenna Counterpoise Ground Wave Vertical Antennas Sky Wave Dipole and End Fed Antennas Remote Operation Speech Operation Morse Operation Rebroadcasting Page ee 13 16 16 19 20 20 20 25 50 50 56 56 29 40 Battery Charging Units 2 22 Hand Generator 2 23 Charging Unit 2 24 D C Charging Units 2 25 Working to Other Radios CHAPTER THREE USE OF RADIO IN A VEHICLE 3 1 Introduction 5 2 Installation 5 5 Fitting RT320 1 5 4 Operation CHAPTER FOUR PREVENTIVE MAINTENANCE 1 General 5 Maintenance Instructions 4 4 CHAPTER FIVE CORRECTIVE MAINTENANCE AND FUNCTIONAL CHECKS General Functional Checks Battery Check Frequency Check Operating Mode Checks 1 AM Reception 2 AM Transmission 2 SSB Reception 4 SSB Transmission 5 6 CW Reception CW Transmission MD ND MI MI MI MI A A AA AN gt TABLES CHAPTER ONE 1 Radio Station PRC320 1 Items 49 49 50 50 25 25 ix Fig No 1 LIST OF ILLUSTRATIONS The PRC320 1 Manpack CHAPTER TWO 2a b c 13 14 15 16 17 18 19 o m Basie Station and Ancillary Equipment Fitting RT320 1 to Carrier Fitting Battery Fitting Battery Cables Assembling Manpack Operating Information ATU Range and Loading and Dipole Elements Tables
11. and is being charged When the battery is fully charged this lamp will extinguish and an associated green lamp 2 will light 2 25 8 approximate charging times from flat 1 battery lihours b 35 5 battery 4 hours 2 25 9 Except when connecting or inspecting the charge state of batteries set the LAMPS switch 7 to OFF 2 25 10 Replace charged batteries with discharged ones there is no need to switch off when doing so damage to the battery or the charging unit will occur if a fully charged battery is left connected APPROPRIATE D C SUPPLY Fig 18 D C Charging Unit 45 D C CHARGING UNITS Fig 18 2 24 The d c charging units 14V and 28V d c input are primarily designed to float charge a Clansman manpack secondary battery used with a vehicle radio The charging period is as follows 46 2 24 1 Using the d c charging unit supply cable connect the D C INPUT plug 4 to the appropriate d c supply 14V or 28V ensuring correct polarity 2 24 2 Using the battery charging cable connect the charging connector on the battery to the OUTPUT connector 5 2 24 5 Set the INPUT switch 5 to ON 2 24 4 Set the LAMPS switch 6 down on CHARGE PROCEEDING YELLOW lamp 1 will light to indicate that the battery is properly connected and is being charged When the battery is fully charged this lamp will extinguish and the CHARGE COMPLETE GREEN lamp 2 wil light The
12. approximate charging times from flat are a 1 battery hours b 23 5Ah battery 4 hours 2 24 5 Except when connecting the battery or inspecting its charge state set the LAMPS switch to OFF No damage to the battery or the charging unit will occur if fully charged battery is left connected WORKING TO OTHER RADIOS Fig 19 2 25 The PRC320 1 will work to another PRC320 1 and to Clansman radios VRC321 and VRC322 in any transmission mode and on any selected 1 kHz channel in the frequency range 2 MHz to 30 MHz It will also work in limited modes of transmission and on limited frequencies to the other radios as in the examples shown below 77 Clansman radios CW AM LSB USB 2 50MHz lkHz Channels PRC 516 2 8MHz 2500Hz Channels SR 15 Fig 19 Working to other Radios Oo SR A 14 Channels CW AM 2 loMHz SR C 15 4T VEHICLE Fig 20 Vehicle Harness Interface 48 Downloaded by RadioAmateur EU CHAPTER THREE USE OF RADIO IN A VEHICLE INTRODUCTION 5 1 When used in a vehicle the RT320 1 is secured by its carrier to a bench or wall mounted rack and connected via its antenna terminal to the vehicle whip antenna The equipment can be connected directly to headset handset or morse key as in the manpack role or into the vehicle harness via a control radio set local remote CRL R and interconnecting box harness adaptor IBHA as shown in block diagram for
13. as wide as you can Seal your lips on the victim s cheeks around his nose Blow air into his nose until you see the rise inspiration ii e Remove your mouth to let him breathe out his chest will fall expiration f Take another deep breath and blow again as soon as he has exhaled and continue inflations 10 to 15 times a minute This is a little slower than the normal rate of 18 The movement of the victim s chest provides Visual confirmation of the success of your efforts 3 If you fail with the nasal route try the mouth as follows Lift the jaw and hold his mouth open slightly as you blow keeping the head tilted well back with the other hand Seal your lips around his opened mouth and press your cheek against his nostrils to stop air leakage and blow until you see the chest rise Continue as described in e and f above until normal breathing returns or medical assistance becomes available DO NOT GIVE LIQUIDS UNTIL VICTIM IS CONSCIOUS NOTE If after 5 or 6 effective inflations of the patient s lungs there is iii i improvement in the colour of the face and lips ii constriction of the dilated pupils iii no pulse to be felt in the neck elsewhere this means that the heart is not beating Carry out EXTERNAL CARDIAC MASSAGE see page v iv EXTERNAL CARDIAC MASAGE ts a Lay the victim on his back on the ground or on some other firm surfac
14. needle was below the second mark replace the battery 5 5 5 Tune the antenna as described in Chapter Two Page 20 and recheck the as described above FREQUENCY CHECK 5 4 The operator can check the frequency accuracy of the RT320 1 by comparing its frequency with that of either laboratory frequency standard or a Standard frequency broadcast The check procedure is as follows 56 5 4 1 Set the mode selector switch to the CW position Set the frequency of the RT320 1 to that of the check station ensuring that the latter is transmitting CW only so that pure tone is heard in the headset Any other mode of transmission from the check station might Ama ara ars a wm 3 cause a warbling tone that could be mistaken for frequency instability in the RT320 1 5 4 2 Set the mode selector switch to FREQ CHK and listen to the two tones now present adjusting the GAIN control as necessary a If the tones fluctuate slowly the RT320 1 frequency accurary is satisfactory the rate of fluctuation indicating the amount by which the frequency is off tune If speech is badly distorted at the higher frequencies in the LSB or USB modes the equipment should be sent to workshops for recalibration as soon as possible b If 8 rapid warble is heard the frequency is well off tune and the equipment should be sent to workshops for recalibration Even with the frequency well off tune in an emergency it might be
15. possible to communicate with another PRC320 1 in the AM or CW modes OPERATING MODE CHECKS 5 5 Check the PRC320 1 for correct operation in each position of the mode selector switch as described below When checking reception in each mode another PRC320 1 can be used as a transmission source by transmitting on the same frequency as the equipment being checked speech in the voice modes and keyed CW in the CW mode The check procedure is as follows 57 58 5 5 1 AM reception Set the mode selector Switch to AM and the GAIN control as required YES Loud voice signals heard in handset Check switch set to Check handset properly connected Check battery See para 5 3 Check GAIN control Check antenna connections to radio Replace handset Replace radio AM reception satisfactory Fig 25 Reception Check Downloaded by RadioAmateur EU 5 5 2 AM Transmission Set the mode selector switch to AM the GAIN control as required depress the pressel and speak into the microphone YES Meter reads normal Sidetone heard YES antenna current in handset NO Check battery Check battery See para 5 5 See para 5 5 NO Check antenna Replace connections to radio handset _ NO Replace radio Check antenna length correct and antenna raised above ground Check antenna components Replace handset P Replace radio AM transmission satisfacto
16. the WORKING control to obtain the required volume in the remote headset or handset To call the local operator turn the function switch to the Spring loaded CALL position 2 20 5 If required the RCU can be operated in the speech mode by setting the function switch to VOICE and the RT320 1 to AM LSB or USB 29 REBROADCASTING Fig 15 2 21 PRC320 1 be operated as manual rebroadcast station in conjunction with a control radio set local remote CRL R an interconnecting box harness adaptor IBHA and an interconnecting box 2 radio IB2 Interconnections between the units are shown in block diagram form in Fig 15 but reference should be made to the User Handbook for Clansman Radio Control Harness Army Code No 61172 RT320 1 RADIO A CHARGING P CONNECTOR INPUT VEHICLE POWER SUPPLY 4 WAY VEHICLE 2 SET Fig 15 Local Rebroadcast Interconnections 40 HAND GENERATOR HANDLE STOWAGE POSITION Fig 16 PRC320 1 with Hand Generator BATTERY CHARGING UNITS HAND GENERATOR Fig 16 2 22 The hand generator enables a PRC320 1 to be operated for an indefitite period without changing the battery and complete with a 1 secondary battery is latched to the RT320 1 in place of a 5 5Ah battery an emergency the generator alone without the battery can be used to power the RT320 1 when in the receive condition The generator can be used with the equipment
17. turn is mounted on the shock absorbing mounting tray 1317 The 7320 1 complete with manpack carrier is mounted on the vehicle rack which enables the RT320 1 to be quickly removed for reversion to the manpack role 1 4 Operating into the vehicle whip antenna see Part 1 Chapter Three the equipment provides reliable ground wave 558 communication at distances of up to 100km over average rolling terrain Using sky wave antennas in ground station applications as described in Part 1 the range is several thousand kilometres in the 30W station matching of resonant dipole configurations is provided solely by the lengths of the dipole elements The antenna may then be connected directly to the output of the 100W amplifier and the ATU is not necessary 1 5 PRC320 1 100W requires a nominal 28V d c supply and operates satisfactorily from a supply in the range 20V to 327 RT320 1 itself can be 68 Downloaded by RadioAmateur EU powered from the 1311 or by its own battery float charged by d c charging unit When used in a vehicle with a nominal 12V d c supply a separate converter is required TECHNICAL DATA 1 6 Transmitter Power output Typical Range Ground Wave Sky Wave Antenna Tuning Time Temperature Range Maximum Altitude Environmental Protection Power Supply Current Consumption Average ZW 30W 100W p e p Up to 100km 600km plus 10s maximum 4s average
18. up the equipment as shown in Fig 6 pages 22 and 23 but do not tune the ATU operation 5 as in this configuration antenna matching is provided solely by the lengths of the dipole elements 2 16 Examples of other dipole configurations are given Fig 12 these examples the dipole centre junction and antenna feeder cable are not used the coaxial link between the INT TUNER and T R sockets remains fitted and the wire antenna ends are connected directly to the RT320 1 antenna and earth terminals as shown The lengths of the dipole elements are specified in the table on the radio set also shown in Fig 7 page 24 The equipment is set up as shown in Fig 6 pages 22 and 22 using the RANGE and LOAD switch settings given for the V dipole in Fig 7 page 24 54 Fig 12 Examples of other Dipole Configurations 55 2 17 The end fed antenna an example of which is Shown in Fig 15 uses one antenna wire connected to the RT320 1 antenna terminal and can be supported by a mast or a wall instead of a tree After setting the antenna length as specified in the END FED column of the ATU RANGE AND LOADING table Fig 7 page 24 the equipment is set up as shown in Fig 6 pages 22 and 25 using the RANGE and LOAD switch settings given in the table The antenna counterpoise must be used with this antenna see para 2 10 Fig 15 Example ot End Fed Antenna REMOTE OPERATION Fig 14 page 37 2 18 The PRC320 1 can be operated remot
19. 1 The procedures outlined in this chapter are to be followed when checking the RT320 1 and its ancillary equipment These checks are to be carried out as part of the preventive maintenance given in Chapter Four or in the event of equipment failure They are designed to enable an operator to prove quickly that the equipment is functioning correctly or to localise the fault if it is not following points are to be observed all times 5 1 1 The operator is not to open sealed equipment under any circumstances 5 1 2 The equipment is not normally to be removed from its parent installation in order to perform maintenance 5 1 5 The user is only to take remedial action where this is stated to be specifically within his capability 5 1 4 The user is not to make adjustments or replace items unless he make a confirmatory test FUNCTIONAL CHECKS 5 2 When carrying out the functional checks following it is to be ensured that the equipment has been correctly set up and is being operated in accordance with the operating information given in Chapter Two page 20 55 BATTERY CHECK 5 5 Check the charge state of the battery as follows 5 5 1 Set the transmitter power switch to BATT CHK and the mode selector switch to the CW position 5 5 2 Depress the pressel or the morse key and check that the meter needle registers on or above the second mark on the scale the first mark is zero Release the pressel If the
20. 2 3x0 G OGZ X 066 066 6 1 069 1ej331usuesu SNOISNSNWIG DIA IVNIWON ON dau AWVN NONNOO WALI TVNIWON SWHLI NOILVLS OIQVH Aq 42 42 ac ac qc 346 2 3021 801 3001 2011 4002 uotytsod uuog x 06 X 012 uuog x 06 x 012 OEZ X 046 x 067 uuoo x OLL X 052 unu 08 X SNOISNUNIG TVNIWON 06 v11 66 0284 06020 1 06 612 029 66 6666 19471 1 0 9 8206 129 66 028S 62061 7 079 8802 029 66 0284 21471 1 079 2751 1111 66 6086 12671 1 099 6995 029 66 4964 29061 7 0 9 ON puey 91489 uorsuejxe 1e339q JUOT Uc saqojonpuoo 2 oe e ATquasse o q92 3 eq Zeg Kex fay yospuey AWVN NOWWOD AWVN WALI 30yI 2089 2091 9049 FALL LHOISM TY
21. 320 1 station described in Part 1 of this Handbook and can be used as either a vehicle radio or a ground station It comprises the basic RT320 1 transmitter receiver together with a PV1311 100W amplifier PV1313 automatic antenna tuning unit and its associated control mounting tray PV1518 and for vehicular use a 1517 mounting tray and the 520 1 vehicle rack described in Part 1 Interconnections between the units are provided by cable assemblies which can be supplied in lengths Suitable for any installation This part of the Handbook contains information only on the 100W station equipment which is additional to that used in the 50W station Thus reference should be made to Part 1 for details of the RT320 1 and the common ancillary equipment 67 PURPOSE 1 2 Although it can be used as a ground station the PRC 20 1 100W is primarily a vehicle radio operating in the SSB mode over the frequency range 2 to 50 MHz DESCRIPTION 1 5 In the 100W role the RT320 1 operates as a driver for the 100W amplifier the output of which feeds the antenna via the automatic antenna tuning unit ATU This takes the place of the RT320 1 integral antenna tuning unit which in this application is not used The PV1518 operates as control unit and mounting tray for the ATU and also accepts the 100W amplifier or the RT320 1 In vehicle installations the ATU is normally stacked on top of the 100W amplifier and together mounted on the PV1518 which in
22. 5966 v 29L 6 0 9 26 lt 2 029 66 566 amp 7 1 079 6770 1 11 66 0286 1 1 079 ON AWVN NOWNOO AWVN WALI o p A82 Age corp 4 AVL andur 2 2 103onpuoo 0 zamod 2 4 SUOT WOOG 03 9 1482 Old Od 5 1950 41043000 11 DHOISM TVNIWON 0 2 X 01 OSE x Opp SNOISNMWIG TVNIWON 88 10 7 989 18 0 989 98 10 7 989 2960 1 201 20110 7 989 60110 1 989 9tv 10 1 989 10 1 989 L19L 1 0 9 1690 11 66 0 19 82971 1 0 9 9 tL L1l 66 6666 LV VV 6 S0L 691 211 66 S66S 216471 1 0 9 1 dtym lt 2 9 suotyoes dtym sea 1014 eseq aogzdepy
23. MINAL ADAPTOR WIRE ANTENNA LID SCREW STRAIN RELIEF CLIPS SPIGOT FOR FIXING TO PV1316 BASE ANTENNA TERMINAL ANTENNA INSULATOR PV1313 CASE l The long wire antenna adaptor facilitates secure connection of a long wire antenna to the PV1313 antenna terminal or to the PV1316 vehicle antenna base It comprises an isolating capacitor enclosed in a rigid box of low loss compound A slotted bracket for connection to the 1313 antenna terminal and a spigot for insertion into 86 Joa ag p ay ad d S ROS EC gt OS M OM e M the PV1316 base are connected to the lower end of the capacitor A spring loaded antenna terminal is connected to the upper end Two strain relief clips are mounted on one side 2 fit the adaptor to the 1313 slacken the PV1313 antenna terminal and fit the adaptor as shown in the diagram with its shoulder in firm contact with the PV1313 and the recess in this shoulder clearing the lid securing screws Tighten the antenna terminal It is possible to fit the adaptor so that it covers the PV1313 earth terminal but this should be avoided as connection is more difficult 3 To fit the adaptor to the PV1316 base slacken the PV1316 wing nut insert the adaptor spigot fully into the base and tighten the wing nut 4 connect the wire antenna to the adaptor depress the antenna terminal cap feed the bared end of the antenna through the terminal h
24. NIWON UT 061 X 066 up G uuog wog oS pepue31xe woz x OVI 06 x OL X 081 SNOISNAWIC IVNIWON L206 29 66 0284 6 671 1 079 8671 1 11 66 0 89 6 671 1 079 lt 084 029 66 S66S 200 70500 1 989 66 0284 8LGY V V Ov9 OttL LVI 66 028S G6LSv1 1 009 8508 029 66 0 19 68971 7 079 ON day 35 up G qgaoddns qsen Suo 9 40 I 4 KTquesse uotzounf uor4ounf aaquag 9 2 4484 faepuooas 3 NONWWOO AWVN WALI 10 81 81 vi vl vi vi 376 2 33 2 3091 2002 301 376 01 2089 LHOTHM uuozZi x Ovi X 012 x OVL x 01 ucz z 04 08 002 BUOT uugy x 066 uuog X OZ X 064 SNOISNAWIC IVNINON OSPO LIL 66 0 amp 19 0971 1 079 112 029 66 0 amp 19 1871 1 079 6671 11 66 S66S 0057 1 1 09 0196 029 66
25. PERATION AND REBROADCASTING 2 8 The PRC320 1 100W be operated remotely or used as a manual rebroadcast station as described in Part 1 Chapter Two substituting a PV1511 AUDIO socket for that of the RT320 1 82 CHAPTER THREE PREVENTIVE AND CORRECTIVE MAINTENANCE AND FUNCTIONAL CHECKS GENERAL 5 1 The procedure given in Part 1 Chapters Four and Five are generally applicable to the PRC320 1 100W with the exception that the RT220 1 antenna tuning unit is inoperative and thus its meter does not indicate antenna current This function is performed by the 1511 meter when the OUTPUT POWER switch is set to FWD and the function switch to DRIVER The RT320 1 is still operative when BATT CHK is selected however and can be used to check the RT320 1 supply voltage regardless of whether this is derived from a battery or the PV1518 FUNCTIONAL CHECK 5 2 Before checking the operation of the additional PRC320 1 100W equipment carry out the procedures given in Part 1 Chapters Four and Five to ensure satisfactory operation of the RT320 1 Monitoring of the 100W equipment performance is provided by the PV1511 meter and its associated OUTPUT POWER switch the four positions of which provide meter indications as follows 5 2 1 INPUT the drive level from the RT320 1 which should be approximately 30W peak 5 2 2 FWD the forward output power into the antenna which should be between 80W and 140W depending on the
26. ace battery 2 SELECT FREQUENCY Set switches shown set to 5 763 MHz to required frequency stop at zero positions enables frequency to be set by touch in dark Set FREQUENCY RANGE switch no stop fitted to corresponding frequency band Tone heard in headset handset ceases when correct band selected and frequency stabilized 5 TUNE ANTENNA TUNING UNIT ATU Set to ANT Set RANGE and LOAD switches to suit antenna and frequency see para 2 7 Depress pressel morse key and adjust TUNE control for maximum reading Adjust LOAD switch for maximum reading Selecting lower number position if two give same reading Re adjust TUNE control for maximum reading and release pressel Fig 6 Operating Information 4 RECHECK BATTERY Repeat operation 1 5 SELECT TRANSMITTER POWER Set to LP 1ow power or HP high power as required 6 SELECT MODE Set to LSB USB or AM for speech and CW for morse 7 COMMUNICATE To transmit depress pressel and speak into microphone when in speech mode or operate morse key when in CW mode Sidetone heard in every mode To receive release pressel morse key 8 ADJUST VOLUME Adjust GAIN control for required volume of received signal 25 ATU RANGE AND LOADING VERTICAL ANTENNA LENGTH MF TRES 29 9 26 21 18 46 c 38 32 27 23 20 18 15 13 12 11 10 cu
27. andset or morse key plugged in direct or connected via a harness adaptor into the vehicle harness and operated through a control radio set local remote see Chapter 3 In both cases the radio is connected to the vehicle whip antenna CONSTRUCTION 1 7 transmitter receiver RT220 1 is contained in a sealed light alloy case All controls are mounted on the front panel and external connectors on the top and rear panel Projections around the front and rear panels protect the controls and connectors The RT320 1 is mounted on a lightweight carrier and the battery is clipped to the bottom of the case of the transmitter receiver The manpack whip antenna comprises eight sections of tubing threaded on cord to facilitate assembly When assembled it has an overall length of 2 4m and is fitted to the RT320 1 using the antenna adaptor The whip antenna can also be used with a 5 4m mast and adaptor to provide a 7 9m vertical antenna for ground station use 5 4m mast consists of six tubular fibreglass sections approximately 1m in length together with supporting guys and other accessories When dismantled it can be packed into a reinforced fabric case for ease of transportation Assembly details are shown in Fig 8 page 27 The vehicle whip antenna comprises four sections of Spring steel tubing which together When assembled the antenna has an overall length of 4m and is fitted via an adaptor to a sprung base mo
28. anual rebroadcast facilities can be obtained in conjunction with units of the Clansman radio control harness A solar shield is available to protect the radio from direction radiation by the No harm is done if the shield is left fitted to the radio when it is not needed TECHNICAL DATA 1 4 Frequency Range Frequency Control Frequency Indication Frequency Selection Frequency Stability Operating Modes and Bandwidth Operating Temperature 2 to 50 MHz From built in frequency synthesizer and reference oscillator The frequency indicated by the decade switches is a suppressed carrier frequency on LSB and USB b The carrier frequency on AM radiated frequency on CW In increments of 1 kHz by means of five decade switches 1 ppm Voice LSB lower sideband 2 7 kHz USB upper sideband 2 7 kHz AM double sideband 6 kHz Key CW 2 7 kHz 37 C to 52 Environmental Fully sealed Protection Receiver LSB O 8uV for 10dB S N N Sensitivity USB 0 8 for 10dB S N N AM 5 5uV at 50 mod for 10dB S N N CW for 10dB S N N Audio Output mW into 100 ohms less than 10 distortion Transmitter Power High Power 30W p e p 10W mean Low Power p e p 1W mean Power Receive 3 6W Consumptiom Transmit Average Power Supplies 24V d c 3 3Ah secondary battery which provides 12 hours of operation on a 1 9 transmit receive
29. d simple field maintenance and fault finding procedures for radio stations based on the PRC320 1 Handbook is in two parts Part 1 containing information on the basic 520 1 50W output which can be used as a manpack vehicle or ground station and Part 2 containing information on the PRC320 1 100W derivative 100W output which can be used as a vehicle or ground station LIST OF ASSOCIATED PUBLICATIONS Army Code Radio Station UK VRC321 61255 Radio Station UK VRC322 61255 Radio Station UK PRC350 61124 Radio Station UK PRC351 and UK PRC352 61128 Radio Station UK VRC353 61393 Radio Station UK PRC344 61551 Clansman Radio Control Harness 61172 Clansman Audio Accessories Clansman Secondary Batteries and Battery 61394 Charging Adaptor Telegraph Radio low high level 61466 Clansman VHF Antennas 61388 Test Set Audio Radio Audio Accessories NYA Test set Condition Clansman Radio NYA Test Set Harness Connectors Clansman NYA vii 1 PRC320 1 SSB 30W RADIO STATIONS CONTENTS CHAPTER ONE PURPOSE AND PLANNING INFORMATION 1 1 Introduction 1 2 Purpose 1 5 Description 1 4 Technical Data 1 5 Battery Charging Facilities 1 6 Vehicle Installation 1 7 Construction CHAPTER TWO OPERATING INFORMATION 2 1 ON DNAN CO X gt ho PO MM MMMM 2 19 2 20 2 21 viii Basic Station and Ancillary Equipment Assembly of Station Fitting RT220 1 to Carrier
30. e b Place the heel of one hand with the other on top of it on the lower part of the sternum breast bone in the mid line of the chest see Note 1 on following page c Apply firm pressure vertically downwards aided by the weight of the body about 60 times a minute d At the end of each pressure Stroke lift the hands slightly to allow full recoil of the victim s chest e Use sufficient pressure to depress the sternum an inch or so towards the vertebral column spine 2 Artificial respiration must continue simult aneously with external cardiac massage at the rate of about 5 compressions of the heart to one inflation of the lungs 5 Massage should continue until the victim s pulse is clearly felt and the colour returns to normal or until medical assistance arrives Notes Ts vi Do not attempt cardiac massage if there is obvious damage to the victim s chest wall There is a real danger of damage to internal organs by the improper use of external cardiac massage Particular care must be taken with infants and small children with whom much less pressure is required to depress the sternum than in the case of adults these cases the fingers should be used in preference to the palms of the hands UL uU UD FOREWORD This User Handbook is designed for use by the non technical operator and contains operating instructions an
31. e upper and lower guy of each pair to a stake by means of its hook Tighten the guys to maintain the mast in a vertical position 2 9 7 the mast is to support wire dipole or end fed antenna pull the throwing cord of the wire antenna tight and tie off round the tie plate ANTENNA COUNTERPOISE Fig 9 page 29 2 10 The antenna counterpoise provides an artificial earth for all antennas when used on ground of poor conductivity such as desert or frozen snow and ice and should always be used with the ground wave vertical and end fed antennas use the four wires are spread radially around the RT320 1 and the Short lead is connected to the earth terminal of the RT320 1 counterpoise should always be used if doubtful about the ground conditions because its use will never reduce performance and will often improve it Downloaded by RadioAmateur EU 28 2 11 setting up procedure for the RT320 1 when used in conjunction with the counterpoise is as shown in Fig 6 but if the counterpoise is added after setting up the equipment should be retuned Fig 9 Antenna Counterpoise 29 GROUND WAVE VERTICAL ANTENNAS Fig 10 2 12 For ground wave operation the RT320 1 uses vertical antennas based on the 5 4m mast see 2 9 on page 25 In both the 5 5m and the 7 9m antennas the down lead is connected to the RT320 1 antenna terminal as shown and the setting up procedure is as shown in Fig 6 Both ant
32. ear of the PV1318 or second tray and two clinch nuts on the front flange which accept corresponding screws in the front of the PV1318 or second tray Fixing for the 100W amplifier or the ATU is provided by four clinch nuts on the base of the tray which accept the M5 screws by which these two units are secured Earth connections are made by two captive screws on the front flange 1 10 The PV1518 provides a mounting for the 100W amplifier and the ATU and it also incorporates the 70 control unit for the latter PV1318 tray and PV1317 second tray each comprise flanged tray of aluminium alloy with holes in the front and rear flanges to provide fixings for the PV1517 as already described Threaded holes in the tray accept the 100W amplifier or ATU securing screws and plain holes accommodate the RT220 1 securing screws Mounted on the front of the PV1518 tray is a sealed cast case containing the ATU control unit the front panel of which carries three indicator lamps a reset switch and three connectors 71 S3 939 936 93076 DHOISM TVNIWON uugG 792 uug9 162 OGZ x oGc 2 x 042 906 SIE GLZ GLZ 06 SNOISNUXIG IVNIWON LIELAd 41ueudrnbe 96LL2 1 519 dgurqunou L lAd SIELAd 0681 1 17001 BIE lAd
33. ely from a distance of up to 3km by the use of other items from the Clansman range of equipment 2 19 Speech operation For operation in a speech mode AM LSB or USB the PRC320 1 is used in conjunction with a control radio set local remote CRL R at the local position connected to audio 36 Se 2 wm V G Qc ___ pes SKA san 5 20 x Fig 14 Remote operation 51 socket SKB of the RT320 1 and by up to 3km of 110 cable to a remote control handset at the remote position as shown Details of the method of connecting 010 cable to the handset are given in the User Handbook for Clansman Radio Control Harness Army Code No 61172 The setting up and operating procedure is as follows 58 2 19 1 Set the CRL R function switch to LOCAL and set up the RT320 1 as shown in Fig 6 pages 22 and 23 2 19 2 At the RT320 1 select the required speech mode AM LSB or USB The equipment is now ready for operation from either the local or the remote position depending on the setting of the CRL R function swtich the facilities privided in each position of which are as follows a LOCAL RT320 1 controlled by local operator s pressel Both operators hear received signal and transmitter sidetone b REM RT320 1 controlled by remote operator s pressel but local operator can override remote operator by operating his pressel Both operators hear received S
34. ems from the case and fit together the six sections interposing a guy 25 26 plate between the third and fourth and the tie plate between the two lowermost sections 2 9 2 Fit to the top of the mast the second guy plate and a If the mast is to be used for a 5 5m vertical antenna add the adaptor complete with down lead b If the mast is to be used for a 7 9 vertical antenna add the adaptor complete with down lead and then fit the 2 4m whip antenna into the adaptor 2 9 5 Remove the guys from the formers on which they are wound and feed the guy toggles through the underside of the elongated holes in the guy plates Locate the toggles so that they will not pull through the holes when the guys are under tension 2 9 4 If the mast is to support a wire dipole or end fed antenna feed the throwing cord of the wire antenna para 2 15 through the top of the circular holes in the upper and lower guy plates If the mast is to be used as a vertical antenna feed the adaptor down lead through the guy plates 2 9 5 Drive into the ground three of the stakes equally spaced in circle of 6m diameter soft ground dig holes for the Stakes and embed them to depth sufficient to withstand the tension of the guys GUY PLATE THROWING Fig 8 Erection of 5 4m Mast with Wire Antenna 27 2 9 6 Stand the base of the mast on the reinforced lid of the case in the centre of the circle and attach the loop at the end of th
35. ennas can be used throughout the frequency range of the equipment except within the dead spots shown hatched in the ATU RANGE AND LOADING table these cases an end fed antenna should be used as described 2 17 The antenna counterpoise must be used with these antennas see para 2 10 SKY WAVE DIPOLE AND END FED ANTENNAS Fig 11 12 13 Pages 33 35 36 2 13 For sky wave operation the RT320 1 can use either a dipole on an end fed antenna both based on the wire antenna This comprises 47m of insulated braid marked at one metre intervals with one green marker at five metre intervals with two yellow markers and ten metre intervals with three blue markers it is wound on a bobbin equipped with throwing cord 2 14 Various dipole configurations each using two wire antennas are possible each case the direction of the antenna is not critical for communication over distances up to 300km but in tropical areas the antenna should run S for the lowest unwanted noise level For distances greater than 300km the antenna should be erected broadside on to the direction of communication 50 WHIP ANTENNA ADAPTOR a S COUNTERPOISE Ze O 15 am 12 10 5 4 Mast with Ground Wave Vertical Antennas 51 2 15 dipole configurations which give best results at maximum range are shown in Fig 11 The setting up procedure for these configurations is as f
36. handle to its stowage position as shown WARNING The voltages used in this equipment are high enough to endanger life CARLESSNESS COULD BE FATAL See First Aid instructions on pages ii to vi 100V 125V or 200V 250V 50 2 60Hz Fige17 Charging Unit 45 CHARGING UNIT Fig 17 2 25 The a c charging unit enables up to 16 Clansman 3 3Ah and 1 secondary batteries to be recharged simultaneously regardless of their state of discharge The charging procedure is as follows 2 25 1 Remove the cover from the charging unit 2 25 2 Adjust the voltage selector panel 8 to correspond with the voltage of the 50 60 Hz a c mains supply WARNING Ensure that the unit is disconnected from 44 the supply whilst making adjustments 2 25 5 Remove the cover from the a c mains fuse 4 and ensure that it is of the correct rating i e 20A for a 100 125V supply and 10A for a 200 250V supply 2 25 4 Open the sliding vent at the rear of the charging unit 2 25 5 Using the a c charging unit supply cable connect the INPUT plug 6 to the a c mains supply 2 25 6 Set the LAMPS switch 7 down on 20 25 7 Using the battery charging cables connect the charging connector of each battery to be charged to an outlet connector 5 and set the MAINS switch 5 down on Each outlet has an associated yellow lamp 1 which will light to indicate that the battery is properly connected
37. ignal and transmitter sidetone c I C Intercommunication between both operators on operation of their respective pressels Both operators hear received Signal superimposed on their inter communication d CALL Local operator calls remote by tone Switch spring loaded to return to position Remote operator can call Downloaded by RadioAmateur EU local in any position of CRL R function Switch by depressing call button on handset 2 20 Morse operation For morse operation CW a morse key and or headset handset at the remote position is connected via a control radio set remote combining unit RCU to the D10 cable in place of the remote control handset as shown The setting up and operating procedure is as described for speech operation in para 2 19 except that the CW mode is selected at the RT320 1 The setting up and operating procedure for the RCU details of which are given in the User Handbook for Clansman Radio Control Harness Army Code No 61172 is as follows 2 20 1 the 110 cable has been connected to the LINE terminals set the selector switch to A the cable has been connected to the LINE B terminals set the switch to B 2 20 2 Set the function switch to MORSE equipment is now ready for operation in the CW mode and can be controlled from either the local or the remote position by means of the CRL R function switch as previously described When the equipment is operating set
38. in any position but it will be found easiest to operate with the equipment on the ground required 3 3Ah battery may be used instead of the 1Ah but in this case the equipment must be removed from the carrier 41 The procedure for fitting and operating the generator is as follows 42 2 22 1 Lift the battery retaining latches on the RT320 1 fit the generator so that its Spring contacts engage with the contact studs of the RT220 1 and then close the retaining latches 2 22 2 Lift the battery retaining latches on the generator fit the battery so that its Spring contacts engage with the contact studs of the generator and then close the retaining latches 2 22 5 Loosen the generator handle retaining wing nut set the handle to the winding position and tighten the wing nut 2 22 4 Turn the handle As the turning speed is increased the generator indicator lamp provided with a sliding shutter for night operation will light until a speed is reached at which the lamp extinguishes Continue to turn the handle at this speed to keep the lamp extinguished 2 22 5 When using the RT320 1 at a normal transmit receive ratio of 1 9 the battery should remain charged by continuous operation of the generator If the normal ratio is exceeded it will be necessary to operate the generator after the radio is switched off in order to fully charge the battery 2 22 6 On completion of an operating period return the generator
39. ing units are also available as ancillaries PRC320 1 and its ancillaries are suitable for use in combat conditions anywhere in the world PURPOSE 1 2 Although it can be used as a ground station or vehicle radio the PRC320 1 is primarily manpack radio operating in the SSB mode DESCRIPTION 1 5 a manpack radio with whip antenna the PRC320 1 provides reliable ground wave SSB communi cation for distances of up to 35km day or night over the kind of country found in Western Europe The basic manpack weighs about 11kg including its carrier a ground station with a 7 vertical antenna it provides ground wave communication for distances up to 50km a ground station using an end fed or dipole antenna with optimum choice of frequency the Sky wave range is several thousand kilometres These ranges are dependent on the choice of frequency As a vehicle radio the PRC320 1 can be operated independently or through the vehicle control harness Its operating characteristics are similar to those of the manpack The manpack carrier is used to mount the radio in vehicle The radio must be run from its own battery and not directly from the vehicle Supply However the radio battery can be float charged by means of d c charging unit Remote control including intercommunication and call facilities is available in conjunction with the Control Radio Set Local Remote and various alternative remote units M
40. ired and depress the morse key YES Meter reads normal Sidetone heard YES antenna current in headset Check battery Check battery See para 5 5 See para 5 5 Check antenna connec Replace tions to radio headset Check antenna length correct and antenna radio raised above ground Check components of antenna Replace key Replace radio CW transmission satisfactory Fig 28 CW Transmission Check PART 2 2 PRC320 1 100W SSB 100W RADIO STATIONS CONTENTS CHAPTER ONE PURPOSE AND PLANNING INFORMATION 1 1 Introduction 1 2 Purpose 1 5 Description 1 6 Technical Data 1 7 Construction CHAPTER TWO OPERATING INFORMATION 2 1 100W Equipment 2 2 Installation 2 6 Operating Information 2 7 Antennas 2 8 Remote Operation and Rebroadcasting CHAPTER THREE PREVENTIVE AND CORRECTIVE MAINTENANCE AND FUNCTIONAL CHECKS 1 General 2 Functional Check 2 3 CHAPTER ONE TABLES 1 Radio Station PRC320 1 100W Equipment Page 75 76 78 82 85 85 72 65 LIST OF ILLUSTRATIONS Fig No CHAPTER TWO 100W Equipment Typical Vehicle Installation Typical Interconnection Diagram Operating Information PANN CHAPTER THREE 5 100W Transmission Check SUPPLEMENTS Long Wire Antenna Adaptor 66 Page TT 19 80 81 85 86 CHAPTER ONE PURPOSE AND PLANNING INFORMATION INTRODUCTION 1 1 The Radio Station PRC320 1 100W is a 100W derivative of the 30W PRC
41. m in Fig 20 loudspeaker output is required the PV2324 amplifier loudspeaker be connected to one of the RT220 1 audio sockets The battery is normally float charged by either a 14V or 28V input d c charging unit DCCU depending on the vehicle electrical suppiy Under no circumstances is the RT320 1 to be powered directly by the vehicle electrical supply as damage could result from so doing INSTALLATION 5 2 Fitting PV1316 vehicle whip antenna Fig 21 Proceed as follows 5 2 1 Determine the required location of the antenna which must be sited clear of all obstructions to prevent short circuit to the vehicie frame and in the selected position cut a hole of approximately 25mm diameter to accommodate the seal on the antenna feeder 5 2 2 Pass through the hole the free end of the antenna feeder and the cord attached to the Seal and bolt the sprung base to the vehicle over the centre of the hole 49 5 5 5 2 5 Pull the seal into the hole by means of the cord ensuring that the hole is now watertight and conect the antenna feeder to the RT320 1 antenna terminal 5 2 4 Screw together the whip antenna sections three for a 3m antenna or four for a 4m antenna slacken the wing nut on the antenna base adaptor insert the antenna into the adaptor set the antenna to a vertical position and tighten the wing nut Fitting RT320 1 Fig 22 Proceed as follows 5 5 1 Using the holes appropriate to the mounti
42. ng position bolt the vehicle rack in such a position that the RT320 1 antenna terminal is as close as possible to the antenna 5 5 2 Fit the carrier complete with RT320 1 and battery on the vehicle rack mounting blocks and tighten the associated clamps It is not necessary to remove the webbing straps from the carrier in order to install the equipment OPERATION 5 4 Connect the RT320 1 as required as in Chapter 2 or in Fig 20 of this Chapter and tune and operate the equipment as described in Chapter 2 50 F SECTION 4 SECTION 5 SECTION 2 SECTION 1 ANTENNA BASE ADAPTOR ANTENNA FEEDER ANTENNA FEEDER CONNECTION SPRUNG BASE SEAL CURD eum FEEDER Fig 21 PV1516 Vehicle Whip Antenna 51 BENCH MOUNTING VERTICAL MOUNTING HORIZONTAL USE HOLES 9 CONTROLS AT SIDE MOUNTING USE HOLES CONTROLS UPPERMOST USE P Fig 22 Installation in a Vehicle 52 CHAPTER FOUR PREVENTIVE MAINTENANCE GENERAL 4 1 To obtain maximum performance from the equipment it must be ensured that is is kept in good condition by regular maintenance This is normally the responsibility of the operator NOT of the Workshop or repair staff and is as described below 4 2 The RT320 1 is a fully sealed radio and must NOT be opened by the operator under any circumstances MAINTENANCE INSTRUCTIONS 4 5 The following maintenance tasks should be carried out by the operator at specified times or as req
43. ole and release the cap Pass two or three turns of the wire antenna around the strain relief clips 5 Recommended wire antenna lengths when using the PV1313 are 2 to 2 15 metres 4 to 8MHz 25 metres 8 to 16 2 15 metres 16 to 30MHz 10 metres WARNING VERY HIGH R F VOLTAGES ARE PRESENT AT THE ANTENNA TERMINALS WHILST TRANSMITTING SWITCH OFF THE EQUIPMENT BEFORE HANDLING AND AVOID CONTACT DURING OPERATION 87
44. ollows 2 15 1 Establish the required length of each dipole element from the table on the case of the RT320 1 2 15 2 Unwind the required lengths of antenna wire from each bobbin and tie off with a double loop or clove hitch so that the coloured length marked is just free of the knot 2 15 5 Erect the horizontal dipole as shown in Fig 11 the side of house or wall could be used instead of a tree using a suitable weight such as a jack knife on the throwing cord to get the wire or cord through the branches of the tree Tie off the cord in the same way as the antenna wire 2 15 4 When only a 5 4m mast is available to Support the antenna a centre supported dipole can be used This dipole is erected as shown in Fig 11 and the dipole centre junction is secured to the top of the mast with a length of cord The bobbins of the wire antennas are Supported by securing the throwing cords to the Spare stakes included in the mast kit 2 15 5 Remove the coaxial link between the RT320 1 INT TUNER and T R sockets and connect the latter to the dipole centre junction by means of the antenna feeder cable Ensure that no strain is applied to the terminals and 32 Fig 11 Dipole Configurations using Antenna Feeder Cable 29 coaxial socket of the dipole centre junction by looping the antenna wires through its lugs and Suspending the antenna feeder cable from it by means of the loop of cord attached to the cable as shown 2 15 6 Set
45. ratio 24V d c 14h secondary battery normally used with hand generator which can power the radio for long periods 24V d c signal batteries when used with special cable assembly fitted with non reversible polarity connector BATTERY CHARGING FACILITIES 1 5 The 14V or 28V D C Charging Units can charge Clansman 3 3Ah or 1Ah battery They operate from a nominal 14V or 28V d c source and provide a constant current charge output The units are intended primarily to float charge the radio battery in vehicle installations The Charging Unit will recharge up to 16 Clansman 5 5Ah or Ah batteries simultaneously It operates from a 100 125V or 200 250V 50 60 Hz a c supply The approximate times for charging batteries from flat using either a d c or an a c charging unit are 5 5Ah 4 hours lihours Charging control is automatic and overcharging or battery damage cannot occur The Hand Generator which clips on to the RT320 1 and battery will maintain the charge state of the battery for an indefinite period with a normal transmit receive ratio of 1 9 VEHICLE INSTALLATION 1 6 When the PRC320 1 is installed in a vehicle its carrier frame is clipped to a mounting rack The battery may be float charged by the d c charging unit from the vehicle supply radio must not be powered directly from the vehicle supply since this could cause damage The radio can be operated with headset h
46. ry Fig 24 Transmission Check 60 5 5 5 SSB reception Set the mode selector switch to LSB and the GAIN control as required completion of the check below repeat it with the mode selector switch set to USB NO Fig 25 SSB Reception Check 5 5 4 SSB transmission Set the mode selector switch to LSB the GAIN control as required depress the pressel and speak into the microphone On completion of the check below repeat it with the mode selector switch set to USB YES Sidetone heard YES in handset Meter reads normal antenna current while speaking only NO Check battery Check battery See 5 3 See para 5 5 NO Check antenna connec Replace handset tions to radio NO Check antenna length correct and antenna raised above ground Check antenna components Replace handset ME Replace radio LSB transmission satisfactory Fig 26 558 Transmission Check Replace radio 62 5 5 5 CW reception Set the mode selector switch to CW and the GAIN control as required YES Loud whistle like signals or receiver hiss heard in headset Check switch set to CW Check headset properly connected Check battery See para 5 5 Check GAIN control Check antenna connections to radio Replace headset n Replace radio CW reception satisfactory Fig 27 CW Reception Check 5 5 6 CW transmission Set the mode Selector switch to CW the GAIN control as requ
47. supply voltage when the antenna is accurately matched 85 2 2 5 REF the reflected power in the antenna For an acceptable matching accuracy the ratio of reflected to forward power should be better than 1 8 ratio of 1 2 5 or worse causes the PV1518 red FAULT lamp to light indicating that the antenna system may have been damaged or its impedance altered by the proximity of conducting structures fault should be rectified and if the antenna is fed via the ATU the system should be re tuned as shown in Fig 4 5 2 4 SUPPLY VOLTS the d c supply voltage to the equipment which should be within the range 20V to 327 for satisfactory operation 5 5 Set the PV1511 function swtich to AMPLIFIER depress the pressel switch and check the equipment as Shown in Fig 5 84 LES Meter indicates normal FWD OUTPUT POWER Meter indicates SUPPLY VOLTS within range 20V to 32V Check supply and supply connections to PV151 and FUSE Check connection from PV1511 to PV1515 Replace 1311 Check PV1518 TUNING lamp extinguished and READY lamp alight Check connection from PV1518 to PV1313 Replace PV1515 Replace 1518 Operate PV1518 RESET switch and depress pressel indicates normal REF FWD OUTPUT POWER ratio connection from PV1515 to antenna and check antenna satisfactory Fig 5 100 Transmission Check 85 SUPPLEMENT LONG WIRE ANTENNA ADAPTOR ANTENNA TER
48. the position between 6 and 9 inclusive which enables the highest meter reading to be achieved when adjusting the TUNE control Complete the tuning procedure as indicated in Fig 6 20 2 7 2 In the case of end fed antenna set the antenna length and the switches according to the table e g for frequency of 5 763 MHz set the antenna to a length of 52 metres and the switches to C and 7 Complete the tuning procedure as indicated in Fig 6 2 7 5 In the case of a dipole antenna using a dipole centre junction and antenna feeder cable antenna tuning is performed solely by adjusting the length of each dipole element to the nearest frequency listed in the table e g fora frequency of 5 763 MHz set the of each element to 11 5 metres 2 7 4 the case of a dipole antenna in which the elements are connected directly to the RT320 1 V dipole the switches are set as shown in addition to adjusting the element lengths e g for frequency of 5 763 MHz set each dipole element to a length of 11 5 metres Set the switches to C and the position between 5 and 7 inclusive which enables the highest meter reading to be achieved when adjusting the TUNE control Complete the tuning procedure as indicated in Fig 6 21 22 1 CHECK BATTERY Set to and CW Depress pressel morse key Check meter needle registers on or above second mark The first mark is zero Release pressel If needle was below second mark repl
49. the battery retaining latches of the RT320 1 fit the battery to the RT320 1 so that the contacts of both engage and then Secure the retaining latches Fig 4a Fitting Battery 2 3 3 If it is required to operate the RT320 1 with the battery separated connect the battery with the battery extension cable ensuring that the plug and socket are correctly orientated on the battery and RT320 1 respectively by means of the locating studs and that the plug and socket securing screws are tightened 17 2 5 4 If it is required to operate the RT320 1 with 24V signal battery connect the battery with the external supply cable ensuring that the socket is correctly orientated on the RT320 1 the socket securing screw is tightened and the red and black leads are connected to the battery positive and negative terminals respectively Downloaded by RadioAmateur EU RT320 1 CLANSMAN 24V BATTERY CONNECTOR BENT D c 24V SIGNAL gt BATTERY CONNECTORS RED Fig 4b Fitting Battery Cables 2 4 Assembling manpack Proceed as shown in Fig 5 1 ASSEMBLE AND FIT WHIP ANTENNA Fit together eight antenna sect ions Slip ferrule over antenna base pull out cord hold ferrule in one hand and rotate antenna to E wind cord round its base Slip d FERRULE ferrule over cord Fit whip adaptor and antenna Set antenna to its operational vertical position 5 ADJUST MORSE KEY IF FITTED Adjust scre
50. the rear of the PV1313 and one of the two earthing screws on the front of the PV1517 to the vehicle framework 2 5 For installation other than that shown in Fig 2 the 1511 and PV1515 can be mounted directly on the 1517 and the RT320 1 can be mounted on a combination of the 1517 and PV1518 In the latter case the M5 securing Screws are inserted from the underside of the PV1318 to engage with the threaded bosses on the underside of the RT220 1 normally used for attachment to the manpack carrier OPERATING INFORMATION 2 6 Set up and tune the equipment as shown in Fig 4 78 Downloaded by RadioAmateur EU uorjoeuuooJequ 4 314 SS3NUVH 3121H3A 0220 1n0HLIA As 24949103 HLIA 24 99121 1 604 59121 1 604 114 19121 1 504 2714415 niv 104170 82 01290 BIEL Ad VNNALNY T9 1 SWITCH ON Set to AMPLIFIER Amber STANDBY lamp lights 2 CHECK SYSTEM SUPPLY Set to SUPPLY VOLTS Meter indicates d c Supply voltage which Should be 20V to 327 LE ARAAAXNLAAAAAAAAAAAAAA 2 5 RF OUTPUT DRIVER AMPLIFIER S BBB 02 45 02 prem po Fig 4 Operating Information 80 J
51. uired 4 5 1 Keep the equipment clean and dry Remove any dust or dirt from the connectors control knobs and terminals If the equipment has been subjected to immersion remove loose water from all connectors Dry the headset or handset by shaking Remove water from inside the morse key by shaking and from the contacts by blowing through the hole below the knob 4 5 2 Check switches and controls to ensure that they are functioning correctly and are Securely mounted on the case 2 5 5 Inspect the case for damage and corrosion 4 5 4 Check that battery connections clean and undamaged 55 54 4 5 5 Check the battery fixing clamps and latches for security Report any weak or broken springs 4 5 6 Check the security of the RT320 1 on its carrier 4 5 7 Examine cable assemblies for frayed ends or damaged insulation Pay particular attention to coaxial connectors used on antenna feeders 4 5 8 Check that wire antenna connections are clean and in good condition If an antenna wire breaks strip back the insulation on each Side of the break and as a temporary measure tie the bared ends together If the ferrule breaks off from the end of an antenna wire Strip back the insulation and again as a temporary measure connect the bared end to the appropriate terminal on the RT320 1 4 5 9 Carry out the functional tests described in Chapter 5 CHAPTER FIVE CORRECTIVE MAINTENANCE AND FUNCTIONAL CHECKS GENERAL 5
52. unted on the vehicle 2m antenna can be obtained by omission of the top section of the tubing The wire antenna consists of 47m of insulated braid wound on a bobbin The braid has coloured markers at one five and ten metre intervals to facilitate measurement of the required antenna length a 40m throwing cord is attached to the bobbin Two wire antennas can be used as a dipole in conjunction with a dipole centre junction and antenna feeder cable The antenna counterpoise comprises four 9m lengths of insulated wire attached to a bobbin on which they are wound when not in use short lead joined to the wires on the bobbin provides an external connection 1996 029 66 6964 79061 7 079 02 lt 8 029 66 4969 yous 3006 9061 7 079 6206 129 50013595 8 66 0285 dryn ez 307 erp x 06061 7 0 9 quesse 6206 129 66 0285 300 wog X ozz 1 0 9 dtym 403 832 X 061 X LOGLE 1 0 9 youduew 1508 029 66 0 19 uyer 2 X 061 X 081 8897 7 079 Ave Saepuooes f1ej38g 1 OZELH 1 02614 8
53. w G for key gap and Screw T for tension to obtain required operator feel 4 FIT SOLAR SHIELD IF REQUIRED In strong sunlight fit solar shield so top just clears antenna socket Fig 5 Assembling Manpack CARRYING POSITION 2 5 The correction carrying position for the manpack is as shown in Fig 1 page xii OPERATING INFORMATION 2 6 Set up and tune the PRC320 1 as shown in Fig 6 ANTENNA TUNING 2 7 The settings of the RANGE AND LOAD SWITCHES on the RT220 1 antenna tuning unit ATU are determined by the operating frequency and the type of antenna various configurations are described in para 2 12 to 2 17 as shown in the ATU RANGE AND LOADING TABLE Fig 7 page 24 on the equipment case Switch Settings for V dipole and vehicle 4m whip antennas are not given in this table and form the subject of a Separate table also illustrated in Fig 7 The method of using the tables is as follows 2 7 1 Determine which block in the appropriate ANTENNA column corresponds with the selected operating frequency in the FREQ MHz column and initially set the RANGE and LOAD switches respectively to the letter and number given in the block e g if the operating frequency is 5 763 MHz commence tuning with the switches set to B and 5 respectively when using the manpack whip antenna B and 6 with the 5 5m vertical antenna and B and 2 with the vehicle 3m and 4m whip antennas When using the 7 9m vertical antenna set the switches to B and
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