Kenwood AT-130 Car Stereo System User Manual
Contents
1. setting up the antenna coupler first determine the antenna system SWR a Set the controls as shown in Figure3 2 Set the BAND switch to the THROUGH position b In the transmit mode calibrate the meter with the calibration control c Depress the CALISWR switch to the SWR 1 position and read SWR If the SWR is lower than 1 5 1 the antenna system impedance is sufficiently matched for practical use If above 1 5 1 tune the system NOTE In the event of too high an SWR over 10 I check the antenna system for breaks or a short circuit ii Using a tube power amplifier transceiver such as a TS 820 Connect the transceiver or transmitter and dummy load or antenna through the AT 1 30 as shown in Figure 3 3 Before adjusting the antenna coupler you should first know the antenna sys tem SWR Connect the dummy load to the ANT connector and adjust the transceiver or transmitter final tuning Then replace the dummy load with the antenna and measure the antenna system SWR NOTE During antenna measurements your transceiver may be operating under heavy loading conditions e l Your signal may also interfere with other stations Use the least amount of power possible and complete measure ments as quickly as possible Ground lead Figure 3 1 Interconnection Coax T I BAND R TUNE CAL PULL LAMP ANTENNA k 1 1 Switch out set CAL control Figure 3 2 Switch Settings 62. 2 brass Philips screws holding inform you of the date of receipt and estimated lamp P C B to meter service time 6 Swing P C B rear edge up and out NOTE When claiming warranty service please 8 Reverse disassembly procedure c 1 Circuits and specifications are subject to change for improvement g cT SWR LAMP 12V Model AT 1 30 Serial Date Purchased Dealer A product of TRIO KENWOOD CORPORATION 1715 2 chorne s h l b u y a sh buya KU Tokyo 150 Japan TRIO KENWOOO COMMUNlCAllONS 11 1 West Walnut Street Cornoton Calfornra 90220 U S A TRIO KENWOOO COMMUNICATIONS GmbH D 6 3 7 4 Stelnbach TS lndustr estrasse 8 A West Germany TRIO KENWOOD ELECTRONICS N V Leuvensesteenweg 504 8 1930 Zaventem Belg um TRIO KENWOOD AUSTRALIA PTY LTD 4 E Woodcock Place Lane Cove N S W 2066 Australla 025309PRINTED I N JAPAN 850 3928 08 K 0
3. 7 The panel meter can be illuminated by an external power source 8 The antenna matching circuit is also effective in reducing TVI since it acts as a band pass CONTENTS AT 130 Specificat ions 3 Section 1 Preparation for Use 4 Section 2 Controls and their functions 5 Section 3 Operation 6 Section 4 Circuit Description 9 Section 5 Additional Information 10 Schematic Diagram 1 1 PIL w w 691 a 1 9 wwz91 M 8 amp Z ww09 H pnls pue lnu 6 u 0 4 adAl dHfl U09 adAljHfl y3 ew wnw ldo le gp 5 0 ueyl ssa1 M OZ 1 Pueq ZH W 4 amp Xew M 0s 1 pa3uelequn uoo amp 01 02 004 ZH W L 6Z 01 S E w o spueq n a e w e 8 Accessories Carefully unpack your AT 1 30 Antenna Tuner and verify the following accessories are included Operating manual 1 copy Mounting bracket J29 0402 02 1 piece Mounting hardware Screw 4 mm diameter 4 pieces Flat washer 4 mm diameter 4 pieces Lock washer 4 mm diameter 4 pieces Nut 4 mm diameter 4 pieces Wing Bolt 4 mm diameter 09 0007 05 4 pieces Polyethylene washer 4 pieces 2P power plug 09 0203 25 1 piece Ground lug 23 0015 04 1 piece Cut end of cable ev
4. Adjusting the Antenna Coupler The antenna coupler is used to match a trans mitter to an antenna system when i t s SWR is too high i e greater than 1 5 1 SWR a Place the BAND switch to the same band setting as your transceiver as shown in Figure 3 41 b Set the CALISWR switch to the CAL I position c Transmit and adjust the CAL control so the meter indicates CAL d Place the CALISWR switch in the SWR position e Ncw you will measure the reflected power Adjust the R TUNE and X TUNE controls alternately for a good minimum meter indica tion Reflected power will be close to zero as a good match is achieved Table 3 1 shows approximate control positions for coupler adjustment Table 3 1 I BAND MHz1 I R TUNE I X TUNE I p B ANT System A Dummy load TS 820 o r other Transceiver f 1 I I a 1 0 0 0 A T 120 ANT First tune up on I i oo l I A Dummy load 4 1 Then check I19 M I I o o o l l I ll _ antenna SWR necessary r71 Coax INPUT Coax Ground Cable Figure 3 3 Inter Connection Adjust alternately f o r minimum 4 SWR reading BAND R TUNE X TUNE PULL LAMP ANTENNA TUNER AT 130 c Figure 3 4 AT 130 Mobile Installation Securely install the Mobile Mount using four lock washers four flat washers and four screws and nuts Install the AT 130 in the Mobile Mount by four w
5. Dear OM if you desire to correspond on a technical or operational problem please make your note short complete reliable repair and to the point And PLEASE make Attempting service without factory authorization it readable can void the unit s warranty Please list Model and serial number 2 Ordering Spare Parts The question or problem you are When ordering replacement or spare parts for having Please give sufficient detail to diagnose other your equipment be sure to specify the following T equipment in the station meter readings and Model and serial number of your transceiver anything you feel might be useful in attempting w Schematic number of the part Printed circuit diagnosis 3 Service You may return your unit for service either to the Authorized Kenwood Dealer from whom you purchased it or to Trio Kenwood A copy of the service report will be returned with the unit Please do not send sub assemblies or printed circuit boards send the complete unit in its original boxes and packing You need not return accessory items unless they are directly related to the service problem 4 Dial Lite lnformation Part B30 9996 00 Rating 12V 40mA To replace 1 Remove top cover 2 Note position of all leads on S meter and lamp P C B 3 Remove all leads from meter and lamp P C B If you want verification of receipt please supply 4 Remove meter bracket a self addressed card or letter and we will 5 Remove
6. The Model AT 130 is designed to satisfy your antenna tuning requirements It has been manu factured with the quality and performance that makes Kenwood The Pacesetter in Amateur Radio This unit has been carefully engineered and manu factured under rigid quality standards and should give you satisfactory and dependable operation for many years Should any trouble arise with this unit please contact the authorized KENWOOD dealer from whom you purchased the item AFTER UNPACKING Shipping Container Save the boxes and packing in the event your unit needs to be transported for remote operation maihtenance or service The following explicit definitions apply in this manual NOTE If disregarded inconvenience only No risk of equipment damage or per sonal injury CAUTION Equipment damage may occur but not personal injury FEATURES 1 The AT 130 is a high performance H F antenna tuner and is a modification of the popular AT 200 antenna tuner The AT 130 is sma l and light and is suitable not only for opera tion in your HAM shack but also for mobile or field operation 2 The AT 130 consists of an antenna coupler an SWR meter and an antenna switch 3 The AT 130 is designed to be used on the w Amateur bands between 3 5 MHz and 30 MHz 4 Antenna MATCHING or THROUGH opera tion is BAND switch selected 5 The SWR meter operates in both THROUGH and MATCHING modes 6 A mounting bracket is included for mobile operation
7. en Using a sharp knife or razor score and remove the sheath Don t cut the braid Slide the coupling over the cable and carefully solder the connector Make certain the insulation is not melted by Interconnection Cable To connect your AT 130 with the TS 130S V or other transceiver an interconnection cable is required Refer to Figure1 1 for details Meter Lamp Power Figure 1 21 Power for the meter lamp is supplied from an external power source Use the supplied 2 PIN plug for power supply connection Observe pola rity I Figure 1 2 Meter Light Power Connection 1 JIIIII IIIII I IIIII IIIII IIII IIIII IIIII IIIII IIIII IIIII IIIII IIII IIIII IIIII IIIIII IIIII IIII IIIII IIIII IIII IIIII I III IIIII IIIII IIIII IIIII IIII IIII IIII SECTION 2 CONTROLS AND THEIR FUNCTIONS I I IIII IIII IIII III IIII IIII IIII IIII IIII II I IIII IIII IIII IIII IIII IIII IIIII IIII IIII IIII IIII IIII IIII IIII IIII IIII IIII PULL LAMP ANTENNA TUNER AT 130 r 71 r 71 Figure 2 1 I Front view 1 Meter The meter reads SWR standing wave ratio and may be illuminated by an external power source 2 CAL Calibrate SWR Switch To measure SWR first set this switch to the CAL 1 position Adjust the CAL control until the meter pointer swings to the CAL line on the meter scale Then depress
8. ing bolts and polyethylene washers Adjust the tilt before tightening the bolts Mounting bracket Figure 3 5 Mounting bracket Detail Figure 3 6 Adjusting the Mounting Angle Figure 11 shows a block diagram of the AT 1 30 Direcltional Coupler The directional coupler samples forward and reflected power from the transceiver to the load Meter Circuit The forward and reflected power sampled by the directional coupler is used for SWR measure ment Forward power is calibrated with the CAL control so reflected power is read as SWR Band Selector Switch This selects the band to which the matching circuit is tuned In the THROUGH position Idthe antenna is connected directly to the trans ceiver bypassing the coupler while still allowing SWR measurement Antenna Coupler The universal matching circuit is capable of matching 20 to 300n loads to the 50a input impedance 1 ANTENNA COUPLER INPUT I METER CIRCUIT n ANT GND Figure 4 1 AT 130 Block Diagram i DIREC TIONAL COUPLER c BAND SELEC c TOR 1 General lnformation Your AT 130 has been factory aligned and tested include a photocopy of the bill of sale or other proof of purchase showing the to specification before shipment Under normal date of sale circumstances it wili operate in accordance with these operating instructions If your unit fails to work contact the authorized dealer from which you purchased it for quick
9. the switch to the SWR 1 position and read the SWR 3 CAL Calibrate ControlIMeter Lamp Switch Before measuring SWR this control is used to calibrate the meter Adjust as described above in item 2 The meter lamp lights when the control is pulled ON 4 BAND Switch Set this switch to the band in which you are operating The BAND switch also has a THROUGH position at which the antenna is connected directly to the transceiver SWR can also be measured at the THROUGH position CAUTION DO NOT operate the band switch while transmitting Equipment damage WI LL occur 5 R TUNE The R TUNE adjusts the resistive component of antenna impedance b 6 X TUNE ransmit u n i n Control The X TUNE adjusts the reactive component of antenna impedance Figure 2 2 Rear View 1 Serial No Plate 4 INPUT Connector This plate is stamped with the Serial Number of The INPUT UHF connector accepts the H F input your unit signal fed from the antenna connector on the 2 GND post transceiver Connect the GND post to the transceiver GND 5 ANT Connector stud Use as short a cable as possible using the The ANT UHF connector accepts the antenna supplied ground lug coaxial cable 3 12V DC Accepts 12V DC for meter illumination Use the supplied plug NOTE Viewed from the rear the right terminal is POSITIVE Measuring antenna system SWR i Using an all solid state transceiver such as a TS 130s or TS 130V Before
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