OWNERS MANUAL
Contents
1. LLLI LEE 100 200 500 i 4 5 10 Hz 7 kHz Fig 21 Frequency curves for the AF amplifiers showing the effect of the High and Low filters 20 50 Square wave response for the AF amplifiers at 40 Hz 100 Hz 1 kHz and 10 kHz R 8 ohms 232. ON OFF pis FM STEREO FI Pe P Pi FM Lg TAPE TAPE Ur qF MONITOR TANDBERG Fm STEREO RECEIVER TR 1000 Instruction Manual BASS _ TREBLE SPEAKERS OF A eee B TAPE 3 Choose the right speaker system TR 1000 has the extra power that is needed to reproduce any kind of music without distortion even at a very high volume Also at a lower sound volume the ample power rating provides a more correct reproduction of music with a wide dynamic range large varia tions in loudness It is however not only the desired sound level that will influence your choice of speaker system The type of music you want to listen to must also be considered Music with loud tones of long duration requires a high average power Organ music has most of the power concentrated at the lower frequencies and will thus require large bass speakers in large ca binets On the other hand pop music often has a very high concentration of power at the higher frequencies and puts therefore severe demands on the power handling capability of the tweeter Even in large speaker systems this may be a diffi cult limitation to overcome because the size of the tweeter is determined by the frequency range to be reproduced and not by the volume of the enclosure The safest way to prevent TR 1000 from damag ing your speakers is to keep an eye on the out put power indicator see page 10 Further
3. Volume control MONO L button The left channel programme is fed to both channels when the button is depressed Pilot lamp lights 2D MONO R button The right channel programme is fed to both channels when the button is depressed Pilot lamp lights 28 29 Depress MONO L and MONO R simultaneously for 30 31 32 33 34 35 36 af 3B 39 40 stereo reproduction with the channels interchanged Balance control Loudness control with pilot lamp Low filter rumble filter with pilot lamp BASS separate bass controls for left and right channels outer and inner knobs High filter 1 scratch filter with pilot tamp High filter 2 scratch filter with pilot TREBLE separate treble controls for E and right chan nels outer and inner knobs PREAMP RECORD Controls the signal to TAPE 3 output pilot lamp lights Speaker setector lf the knob is pulled out the left tuning meter will indicate output power Hinged front lid Conceals operating controls seldom used Stereo jack for connection of tape recorder TAPE 3 Connection of record player tape recorders loudspeakers and headphones 5 pins DIN phono sockets ground 1 TAPE 1 and 2 2 pins DIN terminal screws The DIN sockets wired according to the DIN specifications DIN socket for connection of PHONC record player G Left channel Right channel Fig 2 DIN and phono sockets for connection o
4. I High Filter 2 5 dB at 15 kHz High Filter 1 12 dB at 15 kHz Low Filter dB at 50 Hz Loudness Power indicator Stereo mono 10 The left meter will act as a power indicator when the speaker selector SPEAKERS is pulled out The meter is peak reading and indicates out put voltage for left or right channel whichever momentarily has the highest output Maximum obtainable output power depends on the speaker impedance load per channel The table below shows the relation between output power and meter reading at different load impe Note If the receiver is overloaded at too high ambient tempera ture unsufficient ventilation a thermal switch will switch off the current to the amplifier The amplifier will how ever resume normal operation as soon as the temperature inside the receiver has dropped sufficiently REBLE SPEAKERS TAP IU OFF A 8 B 3 dances For instance from the table we see that for meter readings of 7 5 10 12 5 and 15 the corresponding values of output power with 4 ohm will be approximately 14 25 40 and 56 respec tively The output monitoring function of the meter ser ves two purposes To avoid overloading of the output amplifier To avoid overloading of speakers that are not rated for the full output power of the amplifier Stereo mono switching is performed with the but tons STEREO MONO L and MONO R beh
5. RECTIFIER RECTIFIER 5 E d ariel 3 rua 5 i mov TX mw WORSE TEKST 40645 TEGN HR 304255 15 12 71 Aa Fig 15 Block diagram TR 1000 and TR 1010 Operating controls operating controls are located at the front of M the receiver The primary controls are easily Ui nous mer mo m pa accessible while the secondary controls are con cealed behind a hinged lid in the lower section of pa in B t g p the front panel to prevent unwanted operation AT LE i gat The lid can be easily flipped down with the finger tip as shown Potentiometers for setting of input TANOBERG anexo ta moo sensitivity are located underneath the receiver ower on off switch Switch the receiver on by depressing the button lU nce EO AFC py marked ON OFF Another light push on the button TA GIN rS will switch the power off TANDBERG FM STEREO RECEIVER Volume Balance The output level is primarily adjusted with the t TAPE VOLUME BALANCE BASS knob VOLUME The relative output levels of the UI 4 two channels are set with the BALANCE knob Speaker selector The speaker selector switch marked SPEAKERS Laer BASS TREBLE SPEAKERS has the following 4 positions 1 OFF All speakers are disconnected A Programme to speaker outputs A only Programme to al
6. O RECEIVER 100 The muting circuit automatically blocks the recei ver for FM signals that are too weak to give satis factory noise suppression The muting is also ef fective between the stations and thus ensures a pleasant and noise free tuning When it is desirable to receive a station that is not strong enough to cancel the blocking of the recei ver the muting can be manually switched off by depressing the button MUTE OFF NV PHONES ON OFF MUTE FMSTEREO AFC P1 OFF OFF OFF m i TANDBERG FM STEREO RECEIVER 11 Meters Pretuning of FM stations 12 Correct tuning is important particulary for stereo reception because distortion might otherwise occur TR 1000 is therefore equipped with two tuning meters one indicating the field strength the other one indicating midscale for correct tun ing When tuning in to a station adjust to maxi mum deflection on the left indicator then carry out the fine tuning to obtain midscale indication on the right meter 5 10 1 zB set should be allowed few minutes warming be fore the pretuning procedure is carried out NOTE The TAPE MONITOR button must be released when listening to radio Depress the AFC OFF button in order to disable the automatic frequency control Then depress one of the buttons P1 P2 P3 P4 or P5 and tune with the corresponding tuning knob behind the hinged front lid until the de
7. cations are minimum values All curves represent typical curves Definitions DIN Deutsche Industrie Normen 45 500 IHF Institute of High Fidelity Mains voltage 220 240 volts AC 50 60 Hz Can be rewired for 115 volts Power consumption 28 225 watt Dimensions Length 43 cm 17 height 12 cm 43 27 depth 30 5 cm 12 knobs 2 cm 3 4 Weight 8 8 kg 20 Ibs FM section Tuning range 87 5 108 MHz Frequency range 50 s deemphasis 20 16 000 Hz 3dB Sensitivity at 26 dB signal noise DIN 14V at 75 ohms 24V at 300 ohms Sensitivity at 30 dB signal noise 24V at 300 ohms Signal noise at 1mV antenna voltage Unweighted DIN 64 dB in mono 62 dB in stereo Weighted DIN 66 dB in mono 64 dB in stereo Unweighted IHF 68 dB in mono 66 dB in stereo Distortion at 40 kHz deviation DIN 0 2 o Distortion at 75 kHz deviation 0 3 o IF rejection IHF 100 dB Image frequency rejection 70 dB IF bandwidth 6 dB 210 kHz Limiting 3 dB 1 5 V at 75 ohms Muting threshold 54V at 75 ohms Capture ratio 1 8 dB Static selectivity 300 kHz 48 dB Channel separation DIN 35 dB at 1 kHz Pilot tone suppression DIN 68 dB 38 kHz suppression DIN 50 dB Supplement for TR 1010 AM section Frequency range mediumwave 518 1600 kHz IF frequency 455 kHz Sensitivity IHF Ferrite Aerial 600 V m external aerial 60 nV at 1000 kHz and 20 dB s
8. corders connected to the outputs TAPE 1 or TAPE 2 respectively For playback from tape recorder connected to TAPE 3 either one of the TAPE selecting buttons or the TAPE MONITOR button must be depressed The PREAMP RECORD button behind the lid must be in released position If the PREAMP RECORD button is depressed the signal applied to the TAPE 3 connector will be fed direct to the power amplifiers and consequently the volume and tone controls will have no influence on the programme being played back The output volume will be attenuated approx 30 dB For stereo mono switching see page 10 PHONO TAPE 2 MONITOR 2 3 rr 2 VOLUME Simultaneous recording can be accomplished on tape recorders connected to both TAPE 1 and TAPE 2 The programme can also be recorded on a third tape recorder connected to TAPE 3 provi ded that the TAPE MONITOR button is not depres sed If it is desirable to feed the programme to TAPE 3 via the tone controls and the volume control dep ress the PREAMP RECORD button The speaker volume will then be attenuated to a suitable moni toring level If the PREAMP RECORD button is in released position the programme to TAPE 3 is unaffected by all operating controls BASS TREBLE SPEAKERS 1 gm Copying tape Simultaneous recording of a radio programme and playback from tape Headphones Copying f
9. e bass and treble controls have no effect on the record ing If the tape recorder has separate heads for record ing and playback the programme can be monitor ed in playback while recording is going on B test by depressing the TAPE MONITOR button The tape recorder must be set for B test To return to monitoring of the programme source switch the tape recorder to A test SOURCE or release the TAPE MONITOR button with another light push B test monitoring can also be performed when recording on TAPE 2 The TAPE MONITOR button should then be in released position while the TAPE 2 should be depressed Note The programme select button must be held in its depressed position while the TAPE 2 button is depressed in order to prevent that the programme select button is released Connect the record player and the tape recorder to the sockets PHONO and TAPE 1 respectively set the tape recorder for recording depress the button and start the record player The recording is unaffected by speaker selector vo lume bass and treble controls B test of the recording can be obtained by depres sing the TAPE MONITOR button see preceding paragraph NO TAPE 2 1 VOLUME MONITOR 2 1 FM PHONO i4 iu Pact 15 Playback from tape recorders Recording on more than one tape recorder Recording tone controlled programme on TAPE 3 16 Depress buttons TAPE 1 or TAPE 2 for playback from tape re
10. ed In the Tandberg Hi Fi speakers systems the frequency range is divided in two or three ranges each one with a carefully matched speaker In systems for high output power there are usually three speakers one special bass speaker which has little radiation in the medium frequency range one speaker for the medium range and one for the treble For moderate output volume two speakers will give satis factory result because the smaller bass speaker also will cover the medium range One small treble speaker in addi tion takes care of the higher tones Pressure chamber systems All Tandberg speakers are mounted in tight enclosures This method which has been used by Tandberg for 35 years renders good bass reproduc tion even for small enclosures Bass resonance bass response Every Hi Fi speaker sy stem has a resonance frequency which determines the lowest frequency that can be reproduced without distortion and with approximately the same volume as the rest of the tone range A good bass performance requires a low reso nance frequency Size of the enclosure bass response a pressure cham ber speaker the bass resonance is determined by the size of the enclosure the diameter and the weight of the speaker cone Even with a small enclosure and a moderate speaker diameter the bass resonance can be kept at a low frequency if the weight of the conet is increased This has been done 20 in Tandberg Hi Fi speaker systems 20 a
11. f record player 5 pins DIN phono sockets Stereo jack Phono sockets for connection of record player Phono sockets Signal to tape recorder for recording Right channel Left channel DIN socket for connection of tape recorder Left channel Phono sockets Signal from tape recorder Right channel for playback Fig 3 DIN and phono sockets for connection of tape recorders TAPE 1 and TAPE 2 SPEAKERS TAPE OFF A Stereo jack for connection of tape recorder TAPE 3 iy Fig 4 Connection of tape recorder TAPE 3 4 LOUDSPEAKERS 4 8 OHMS Left channel Right channel output output B Left channel Right channel output B output Fig 5 DIN sockets for connection of loudspeakers Left channel output Right channel output B Left channel output B Right channel output Fig amp Terminal screws for connection of loudspeakers These terminals should be used in installations designed for high output power Motice the terminal polarity to obtain correct phasing see page 19 y PHONES ON OFF Stereo jack for connection of headphones Fig 7 Stereo jack for connection of headphones Mating plugs for record player tape recorders headphones and loudspeakers The plugs are seen from the wiring side Fig 8 Record player PHONO Common lead Signal from pick up right channel eed nnected Sig
12. he programme can be tone controlled if the but ton PREAMP RECORD is depressed as explained in the preceding paragraph Pa P4 Po FM PHONO TAPE MONITOR PH NES ON OFF MUTE STEREO P2 OFF OFF OFF noc a EES SS TANDBERG FM STEREO RECEIVE 17 Adjustment of input To match the output signal from the programme itivity f sources connected to these outputs and to ensure INPUT SENSITIVITY sensi vity or the same output level when switching from one PHONO 2 1 1 programme source to another adjust as follows MIN MAK MIN Tune the receiver to strong station and feed n and TAPE 2 inputs programme from the record player and the tape 6 ms recorder to the appropriate inputs of the receiver Without operating the volume control adjust the corresponding input level controls at the bottom of the receiver until all programme sources reproduced at approximately equal sound levels Supplement for TR 1010 The TR 1010 is a special version of TR 1000 In addition to Tuning on mediumwave the FM band TR 1010 is equipped with a mediumwave band Select the AM band by depressing the button marked AM with a built in ferrite aerial The number of pretuning FM The dial pointer will then light and the tuning can be accom stations however is reduced to 4 plished with the tuning knob at the right hand side of
13. ignal noise Static selectivity 9 kHz 42 dB 21 Audio section Max output power one channel only continuous sinus Nominal output power continuous sinus 0 2 distortion at 1 kHz 2 x 50 watts in 4 ohms 2 x 35 watts in 8 ohms 0 2 o distortion at 1 kHz 64 watts in 4 ohms Music power 2 x 70 watts in 4 ohms intermodulation 250 8000 Hz 4 1 Power amplifier 0 2 7 Damping factor 30 at 4 ohms 60 at 8 ohms Power bandwidth 10 50 000 Hz Frequency range linear inputs 12 50 000 Treble control 14 dB at 10 000 Hz Treble loudness 7 dB at 10 000 Hz Bass control 16 dB at 50 Hz Bass loudness 12 dB at 50 Hz Low Filter 8 dB at 50 Hz High Filter 1 12 dB at 15 000 Hz High Filter 2 5 dB at 15 000 Hz Channel separation DIN PHONO 52 dB TAPE 55 dB Signal hum and noise DIN reference 50 mW in 8 4 ohms nominal input signal 1 56 53 dB 2 56 53 dB PHONO MAGN 55 53 dB Signal hum and noise IHF reference max output in 8 4 ohms nominal input signal TAPE 1 82 80 dB TAPE 2 82 80 dB PHONO MAGN 66 64 dB Preamplifier 0 2 o 1 5 dB Sensitivity at nominal output power in 8 ohms 1 kHz TAPE 1 adjustable 130 500 mV TAPE 2 adjustable 130 500 mV PHONO MAGN adjustable 1 8 6 mV TAPE 1 and TAPE 2 outputs unloaded 1 volt at phono sockets 200 mV at DIN sockets E HH
14. ind the front lid Pilot lamps indicate the activated func tion STEREO button depressed the two channels are separated for stereo reproduction MONO L button depressed the left channel pro gramme is fed to both channels MONO R button depressed the right channel programme is fed to both channels MONO L and MONO R simultaneously depressed the two channels are separated for stereo re production with the channels interchanged TAPE VOLUME BALANCE BASS MONITOR a gt e R Tuning AFC automatic frequency control Muting Tandberg TR 1000 has diode tuning enabling pretuning and pushbutton selection of FM stations There are six buttons for selection of stations and six tuning knobs Five of the tuning knobs are loc ated behind the hinged front lid while the sixth one is the tuning knob on the right hand side of the dial which is engaged with the dial pointer Each one of the tuning knobs is furnished with a frequency dial and covers the entire FM band from 87 5 to 108 MHz The tuner has automatic frequency control ensur ing accurate tuning This function can be disabled by pushing the button marked AFC OFF This may be necessary while listening to a weak FM station operating on a frequency close to a stronger sta tion In that case the automatic frequency control may lock on to the stronger station ON OFF MUTE FMSTEREO AFC PI P P3 Pi OFF OFF OFF TANDBERG FM STERE
15. information on the Tandberg speaker sy stems can be found in our main product catalo gue TANDBERGS RADIOFABRIKK A S KJELSASVEIEN 161 OSLO Tandbergs Radiolabrikk A S Kjelsas Tandbergs Radiofabrikk A S avd Kjeller 881 12 72 Part nr 288105 reclamo Operating Controls 16 na Qu c Oo m qq ta 2T 2B FM dial the pointer will light up when the FM button 20 is depressed FM stereo indicator will light during FM stereo recep tion Tuning indicator For output power indication pull out speaker selector knob Centre mark tuning indicator FM tuning knob Socket for connection of stereo headset Mains switch Pretuning of FM stations P1 Muting disable button FM stereo off 11 12 13 14 15 16 17 18 18 20 21 22 23 24 25 ing 26 AFC disable button Pretuning of FM stations P2 Push button selection of FM station P1 Push button selection of FM station P2 Pretuning of FM stations Push button selection of FM station P3 Push button selection of FM station P4 Push button selection of FM station P5 Pretuning of FM stations P4 Push button selection of FM station FM dial Function selector record player Pretuning of FM stations P5 Function salector TAPE 2 Function selector TAPE 1 Tape monitor switch Must be released for radio listen Stereo switch Depress the button for stero reproduc tion Pilot lamp lights
16. l speakers B Programme to speaker outputs B only T The programme is fed to the headphones output in any position of the speaker selector Tone controls Bass and treble can be adjusted independently with the knobs marked BASS tnd TREBLE Each control has an inner knob for right channel and an outer knob for left channel Loudness At low volume the ear is less sensitive to high and low frequencies To compensate for this depress the button LOUDN behind lid whereby the bass and treble are boosted as the volume is turned down The pilot lamp LOUDN will light Rumble filter Rumble from the record player and acoustical feedback between the speakers and the pick up can be reduced by depressing the button LO FILT behind the front lid A filter then attenuates all fre quencies below 70 Hz and the pilot lamp LO FILT lights Scratch filters If the programme is accompanied by strong his sing or scratching sounds old and worn grammo phone records depress the button HI FILT 1 behind the front lid whereby tones above 8000 Hz are heavily attenuated The pilot lamp HI FILT 1 then lights A similar effect but less pronounced is obtained by depressing the button HI FILT 2 behind the front lid The pilot lamp HI FILT 2 will then light To obtain a stronger effect depress HI FILT 1 and HI FILT 2 simultaneously n BASS _ TRERE SPEAKERS OFF A 8 8 KENE LUME L2 BASS T TREBLE SPEAK p OFF A l ER 15 Y
17. lso pick up more remote stations quite efficiently It should be observed that the ferrite aerial is highly directional with a sharp mini mum around the longitudinal axis of the receiver The fer rite aerial can never perfectly replace a good outdoor aerial FM aerial 300 ohms FM aerial 75 ohms coaxial AERIALS AM aerial ground m t Fig 14 Aerial sockets TR 1010 Outdoor aerial The receiver is designed for good reception with moderate aerial lengths but the best result can normally be obtained by using wire 15 20 meters 50 60 feet long at the highest possible elevation Grounding A ground wire should be connected from the receiver to the nearest water pipe or grounding point CENTRE 300 TUNER S 4 on FM TUNER e rir DETECTOR Pad FM AERIAL uu EM DS i E TUNING POWER pa INDICATOR po Pine T Qe pe 2 AM wv ay AM IF ki 5 AERIAL TUNER LM 1 DETECTOR xdi SC RE nw CONTROL somal 06 00 eS STEREO 7 RECTIFIER circuit t PEAKER SELECTOR OUTPUT h e AMPLIFIER RIGHT Teo MITTER DLLOWER b LOUDNESS 1 i LEFT T 5 d FELI ei idv 1 109 m Mure pes ia j x zn n9 v
18. nal from pick up player chassis left channel The common lead and the shield must not be wired together Fig 9 Tape recorders TAPE 1 and TAPE 2 Common shield To tape recorder input right channel recording From tape recorder output right channel playback To 01 5 let Ren pl From tape recorder output recording Lett channel playback Fig 10 Tape recorder TAPE 3 and headphones PHONES anm Left channel Right channel Common shield Fig 11 Loudspeaker SPEAKER Flat pin on Loudspeaker the plug is ground Warning A short circuit in a speaker cable may not necessarily affect the output volume enough to be noticed when playing at low levels Continued operation under such heavy load may shor ten the life of the output transistors If the output level is rai sed an electronic circuit will limit the current to the power amplifiers and thereby limit the output power available To avoid short circuiting take the following precautions when installing speakers Do not strip off more insulation from the wire ends than what is necessary to ensure reliable contact with the plug Twist each wire end Use insulated clamps when fixing the cable to the wall Aerials FM aerials The receiver is equipped with balanced as well as unbalan ced FM aerial input FM aerial 300 ohms balanced FM aerial 75 ohms coaxial AERIALS Fig 12 FM aerial s
19. nd TL 1210 The bass reproduction in these speakers is impressing when con sidering the small speakers cabinets Efficiency operating power The price which must be paid to obtain a good bass response in a small pressure chamber speaker system is a lower efficiency This means that more power must be supplied to the system in order to obtain the same output volume Power limitation Dissipation of heat in the moving coil sets an upper limit for the electric power which can be supplied to a speaker The smaller speaker systems should there fore only be used when a moderate sound volume is needed Tandberg Hi Fi Systems TL 2510 and TL 5010 are designed to match the full output power from TR 1000 These systems are furnished with DOME tweeters and meet the strongest demands for clarity and tone colour in the entire frequency range TL 5010 can be delivered in a special version with a built in protection circuit for the tweeter unit which otherwise may be damaged when music having a high concentration of power in the treble range is to be played at high output volume Selection of speaker system For selection of the right speaker system for a given application we refer to our main product catalogue which contains complete technical speci fications and more comprehensive description of the Tand berg Hi Fi speaker systems Technical Specifications for TR 1000 and TR 1010 Right to alter the specifications is reserved All specifi
20. ockets The balanced input marked 300 2 is intended for connection of a folded dipole 300 ohm with balanced feeder IEC plug must be used The unbalanced input marked 75 Q is intended for direct connection of a coaxial feeder when shielding is necessary coaxial plug must be used A simple indoor aerial for connection to the balanced input can easily be made from flat twin lead with an impedance of 240 300 ohms A 135 cm 53 piece of aerial lead is used for the loop Strip off appr 1 cm 2 of insultation at each end and solder as shown Cut one of the wires in the middle of the loop and connect another twinlead to feed the aerial input Solder as shown The aerial must be mounted with the loop perpendicular to the incoming signal To avoid disturbance and to obtain the best possible recep 6 tion the optimal aerial orientation may have to be found experimentally In areas with unsatisfactory receiving conditions better results can be acheived by means of a more complex FM aerial with several elements Reception of stereo broadcast requires a stronger input sig nal to the receiver A more careful positioning and adjust ment of the aerial can then be necessary in order to avoid signal deterioration caused by reflection TR 1010 Ferrite aerial For operation on mediumwave TR 1010 is equipped with a built in ferrite aerial This aerial is intended for local recep tion but can under good receiving conditions a
21. ption requires a stronger antenna signal and is more sensitive to multipath distortion better aerials are needed under difficult conditions and in fringe areas If the stereo reception is disturbed by noise and distortion the stereo decoder can be disabled by depressing the button marked FM STEREO OFF whereby the programme is reproduced in mono with a better noise suppression PHONES ON OFF MUTE FMSTEREO AFC P2 OFF OFF OFF TANDBERG FM STEREO RECEIVER 13 Record player Connection of tape recorders 14 set has three tape recorder inputs 1 TAPE 2 and TAPE 3 which offer several features for recording playback and copying of tape The different functions will be described later on TARE 2 RS 1 _ 25 t Tow our RNE Connect record player with magnetic pick up to either the DIN socket or to the phono sockets marked PHONO Start the record player and depress the PHONO button Note If hum is picked up by the signal cables connect a wire from the record player chassis to the ground terminal on the receiver To the left of aerial sockets PHONG IN ME TAPE MONITOR 3 P5 FM ee BASS TREBLE E x A KI F RS OON WW Recording Monitoring of recording on TAPE 1 Recording from record player Connect the tape recorder to the TAPE 1 Any pro gramme that is reproduced in the speakers will now be fed to the tape recorder The volum
22. rom TAPE 1 to TAPE 2 and vice versa If tape recorders are connected to these outputs copying from either one to the other can be perfor med Depress the function selector TAPE 1 or TAPE 2 corresponding to the master tape recor der Depress the TAPE MONITOR button for B test see page 15 Recording of a radio programme on a tape recor der connected to TAPE 2 can take place while a programme from another tape recorder connec ted to TAPE 1 is played through the speakers The radio programme can only be monitored in headphones connected to the tape recorder The tape programme that is played back and reprodu ced through the speakers can be adjusted with the volume and tone controls Procedure Tune in to the desired radio program me and depress the TAPE MONITOR button Stereo headphones can be connected to the 3 pole jack PHONES on the left hand side of the front The programme level in the headphones can be set with the volume and balance controls For headphone listening without disturbing other people in the room set the speaker selector to OFF Copying from TAPE 1 TAPE 2 to TAPE 3 Copying may be performed from a tape recorder connected to either 1 or 2 to a tape recorder connected to TAPE 3 Depress the func tion selector TAPE 1 or TAPE 2 corresponding to the master tape recorder B test monitoring is not possible as depressing of the TAPE MONITOR button would interrupt the programme to TAPE 3 T
23. s this will impair channel separa tion and may cause instability Combination of several speakers Each channel has two outputs A and B in parallel If the A outputs are used for the master speakers both B outputs can be used for remote speakers somewhere else in the house or vice versa As already mentioned certain precautions must be taken when more than one speaker are connected to the same output socket Maximum output power is obtained when the combination of load impedances for A and B output of each channel is 4 8 ohms For that reason some recommended ways of connecting 2 3 4 og 5 speakers to one output soc ket are shown in the figures Polarity When the two loudspeakers are placed near each other the polarity must be correct In other words the conesmust move forward and backward in phase If the polarity is wrong one cone will move forvard while the other is going backward and the result will be a reduction of the bass volume This can be corrected by reversing the leads to one of the spea kers 19 Loudspeakers Tonal balance multispeaker system Every speaker has a tone range that is limited by the physical dimensions The largest speakers reproduce the deepest bass tones and fall off for the higher tones whereas the small speakers will have maximum radiation of high tones If the entire Hi Fi frequency range is to be reproduced with good balance a combination of smaller and larger speakers is need
24. sired station has been found Proceed similarly until all the favourite sta tions have been tuned in If the push button marked FM is depressed the FM dial pointer will light and ON OFF MUTE FM STEREO AFC P2 P3 OFF OFF OFF EELEE TEE sm x eee a M P4 S the tuning knob on the right hand side of the dial can be used to search for still another station which can later be selected by pushing the FM button When the pretuning has been performed release the AFC button thereby reactivating the automatic frequency control 8 FM PHONO TAPE TAPE 207 2 NI CUR Lo LL Pushbutton selection FM Stereo Assuming that six stations have been pretuned either one can later be immediately selected by pushing the corresponding programme select button The receiver is fully equipped for reception of FM stereo broadcast FM stereo broadcasting is in several countries based on the pilot tone system which allows the program to be received in mono on mono receiv ers without impairment of programme quality It is an inherent property of the system that a stronger signal is needed in stereo to obtain the same noise suppression as in mono The FM stereo decoder has automatic switching to stereo operation when a stereo signal of sufficient strength is being received If the signal level falls below a preset threshold the programme will be reproduced in mono Because stereo rece
25. the dial erati Op As for the rest of the functions the TR 1010 is similar to Aerials TR 1000 18 TR 1010 has built in ferrite aerial for the AM band This aerial is intended for local reception but can under good receiving conditions also pick up more remote stations quite efficiently The best results however will normally be obtai ned by using an outdoor aerial see page 6 Connection of loudspeakers Connect the speakers to the sockets SPEAKERS at the rear see fig 5 and 6 The amplifiers are designed for 4 8 ohms per channel and supply optimal power when the resultant impedance of all speakers connected to each channel is 4 8 ohms Speakers or combinations of speakers with higher or lower impedance will give less output power Warning A short circuit in a speaker cable may not necessarily affect the output volume enough to be noticed when playing at low levels Continued operation under such a heavy load may shorten the life of the output transistors If output level is raised an electronic circuit will limit the current and thereby the output power available To avoid short circuiting take the following precautions when installing speakers Do not strip off more insulation from wire ends than what is necessary to ensure reliable contact with the plug Twist each wire end Use insulated clamps when fixing the cable to the wall Note Don t use a common return wire for the two channels a
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