My Telefunken Collection

TR 350



Device Type

Analog Receiver

Start of Sale

1979

General Description

If all you wanted was a simple Hifi receiver in 1979, Telefunken's TR 350 might have been a possible answer. One could call this device a crossing of the TT 350 tuner and the TA 350 amplifier. The tuner section is exactly the same as in the TT 350, even located at the same place in the identical housing, just without the variable FM muting level and exact tuning indicator the TT 350 features (it would be possible to add such an indicator by adding a few missing components on the tuner board). The amplifier section is the well-known Hifi Chassis 1000, also used in the TA 350. The housing doesn't look as empty as for the TT 350, yet there is still plenty of space.

Features

FM/MW/LW, tuning indicator, muting switch, selectable automatic fine tuning, monitor function, selectable loudness,

Connectors

AM antenna, FM antenna (coaxial and symmetric), Phono (DIN and Cinch), Tape (DIN and Cinch), monitor (DIN), ground clamp, 2xspeaker (DIN), headphone (DIN and 6.3mm)

Technical Data

(taken from the service manual)
Receiver Part
Wave Ranges: FM = 87.6 ... 108 MHz
MW = 518 ... 1610 kHz
LW = 148 ... 325 kHz
Circuits: AM 5 / FM 9
Intermediate Frequency: AM 460 kHz / FM 10.7 MHz
Sensitivity: FM 1.4 µV Mono / 4.5 µV Stereo
(S/N = 26 dB, 199 Hz, 40 kHz Modulation, 240 Ohm
Distortion Factor FM: < 0.5% Mono / < 0.6% Stereo
(1 kHz, 40 kHz Modulation)
Extraneous Voltage Ratio FM: > 62 dB Mono / > 58 dB Stereo
(acc. to DIN 45 500, Sht 2)
Signal / Noise Ratio FM: > 61 dB Mono / > 55 dB Stereo
(acc. to DIN 45 500, Sht 2)
Pilot Tone Suppression: > 53 dB (acc. to DIN 45 500,
Sht. 2/8, AF and TB)
Channel Separation: > 38 dB / 1 kHz
Amplifier Part
Nominal Output Power: 2 x 50 W RMS
Peak Output Power: 2 x 70 W
Nominal Output Resistance: 4 Ohms
Intermodulation Factor: < 0.5% (250/8000 Hz, 4:1)
Frequency Range: < 20 Hz ... > 40000 Hz +/- 1.5 dB
Power Bandwidth: < 15 Hz ... > 43000 Hz @ K <= 0.7%
Inputs: Input Impedances, Nominal Input Values,
Overdrive ReServe at 1 kHz:
Phono Magnetic: 47 kOhm / 2.4 mV / 27 dB
Tape: 470 kOhm / 290 mV / 25 dB
Monitor: 40 kOhm / 200 mV
Outputs:
Tape DIN: 1.2 mV / kOhm (@ 40 kHz Modulation)
Tape Cinch: 1 V (Ri = 10 kOhm/ 40 kHz Modulation)
Headphone: > 100 Ohm (DIN), > 8 Ohm (6.3 mm)
Speaker: > 4 Ohm (DIN 41529)
(2 x Room 1, 2 x Room 2)
Regulators:
Balance: +3 dB / -13 dB
Treble: +12.5 dB / -12.5 dB @ 15 kHz
Bass: +17.5 dB / -17.5 dB @ 40 Hz
Filter: Noise: Steepness 8 dB / Octave,
Limiting Frequency 6000 Hz
Subsonic: Steepness 8 dB / Octave,
Limiting Frequency 60 Hz
Deemphasis Phono Magnet: according to IEC resp. DIN45547
Extraneous Voltage Ratio: > 60 dB acc. to DIN 45 500
Crosstalk: between channels: > 53 dB (1 kHz)
> 35 dB (10 kHz)
among inputs: > 50 dB (10 kHz)
Dampening Factor: 1:13 (at 1 kHz), 1:6 (at 50 Hz)
Semiconductors: 11 Integrated Circuits
30 Transistors
11 LEDs
16 Diodes
Mains Voltage: 220/110 Volts AC at 50/60 Hz
Fuses: Mains 220 V 1 x T 1.6 A
110 V 2 x T 1.6 A
Secondary 2 x T 2.5 A, T 630 mA
Dimensions: 460 x 145 x 350 mm

Common Failures

none known so far

Spare Part Numbers

(taken from the service manual)

Cabinet Parts
Position Order No. Designation
501 309 796 043 cabinet, brown
502 309 796 042 cabinet, silver
503 309 710 210 flood light dial for brown
504 309 710 211 flood light dial for silver
505 309 833 492 cover for dial
506 309 833 530 cover for brown
507 309 833 531 cover for silver
508 309 833 532 front cover for brown
509 309 833 533 front cover for silver
510 309 833 534 cover for fuse
511 309 831 709 light box for brown
512 309 831 711 light box for silver
513 309 770 920 cabinet foot
514 309 809 951 toggle switch knob for silver
515 309 809 952 toggle switch knob for brown
516 309 802 090 knob for speaker switch
517 309 802 113 control knob for balance, treble bass
518 309 802 126 control knob, fichable, for balance, treble bass
519 309 802 114 tuning knob
520 309 802 115 control knob for wave range
521 309 802 116 control knob for volume
522 309 833 535 cover for knob
523 309 833 536 cover for knob
Electrical Parts
Position Order No. Designation
BS 5109 349 362 016 AM-FM switch board
BS 5344 349 364 975 AF preamplifier board
BS 5350 349 362 013 AF switch board
BS 5352 349 654 944 AF control board
BS 5402 309 370 953 AF preamplifier board
BS 5420 349 364 970 AF o/p amplifier board
BS 5530 309 310 140 mains transformer with fuse board
BS 5606 349 350 925 FM mixing unit with AM tuning capacitor
BS 5730 349 395 022 LED indication for field strength
BS 5772 309 651 972 speaker socket board
BS 5773 309 369 988 speaker switch board
FU 1 309 625 610 fuse T 1.6 A
LA 1 309 621 960 dial bulb 6-7 V/300 mA
525 309 630 994 mains switch, 2-fold
527 309 695 935 power cord with connector
ST 1 309 651 973 sockets bar, 5 contacts
528 309 601 701 FM antenna
529 309 603 807 AM antenna
AM-FM Switch Board
Position Order No. Designation
BS 5109 349 362 016 AM-FM switch board
BU 101/S 101 309 670 923 FM antenna socket
BU 102 309 670 927 AM antenna socket
C 113 309 450 605 disc trimmer N 750 10/40 250 V
C 121 339 582 048 Al-electr. capacitor 10 µF/10 V
C 127 309 410 641 Al-electr. capacitor 4.7 µF/25 V
C 136/165/184 309 413 485 Al-electr. capacitor 100 µF/25 V
C 138/146 309 411 673 Al-electr. capacitor 22 µF/10 V
C 141/148/161 309 410 634 Al-electr. capacitor 4.7 µF/35 V
C 152/162 309 410 655 Al-electr. capacitor 2.2 µF/25 V
C 153 309 412 645 Al-electr. capacitor 47 µF/25 V
C 182/183 309 410 688 Al-electr. capacitor 1 µF/25 V
D 104/109/105/106 309 410 688 diode 1 N 4148
FI 101 309 103 951 ceramic filter 10.7 MHz/0.03 MHz
FI 102 309 111 802 band filter
FI 103 309 103 953 ceramic resonator 460 kHz
FI 104 309 220 031 IF filter coil 2
FI 105/106 309 103 948 ceramic filter 19 kHz/38 kHz
FP 101/102 309 914 708 ferrite pearl
IC 101 309 368 133 IC TDA 1046
IC 102 309 368 094 IC CA 3089 E
IC 103 309 368 173 IC TCA 4500 A
L 101 309 259 919 choke
L 102 309 309 950 antenna transformer
L 103 309 250 930 RF choke 2200 µH
L 104 309 207 922 pre-circuit coil MW
L 105 309 208 911 pre-circuit coil LW
L 106 309 259 934 RF choke
L 107/108 309 218 922 oscillator coil
L 111 309 220 083 filter coil 18 MHz
L 112 309 220 046 filter coil 10.7 MHz
R 143 309 509 075 variable resistor P 10 K 1 0.07 W
R 157 309 500 071 variable resistor S 5 K 1 0.15 W
R 166 309 509 401 variable resistor S 10 K 1 0.07 W
S 104 309 639 003 rotary switch
T 101 309 001 238 transistor BF 441
T 102/103/107 309 001 226 transistor BC 308 B
T 104 309 001 227 transistor BF 256 B
T 108/111/112 339 556 224 transistor BC 548 C
530 309 689 904 IC socket, 16 contacts
T 110 339 556 087 transistor BC 548 B
AF Control Board
Position Order No. Designation
BS 5352 349 654 944 AF control board
C 315 309 412 679 Al-electr. capacitor 47 µF/25 V
C 318 309 412 655 Al-electr. capacitor 47 µF/50 V
C 319/323 309 412 644 Al-electr. capacitor 47 µF/16 V
C 320/324/325/326 309 410 634 Al-electr. capacitor 4.7 µF/35 V
IC 301/302 309 368 212 IC HA 1457
R 316 309 501 949 variable film resistor 2x100 kOhm - volume
R 344 309 501 950 variable film resistor 2x25 kOhm - balance
R 354 309 501 951 variable film resistor 2x100 kOhm - bass
R 373 309 501 952 variable film resistor 2x100 kOhm - treble
S 301 309 639 971 toggle switch 4 x UM
S 302 309 639 977 toggle switch 5 x UM
AF Preamplifier Board
Position Order No. Designation
BS 5344 349 364 975 AF preamplifier board
BU 301/303/305/ 309 679 503 cinch socket
1301/1303/1305
BU 302/304/306 309 672 801 DIN socket, 5 contacts
C 303/310/1303/1310 309 410 728 Al-electr. capacitor 4.7 µF/40 V
C 306/1306 309 414 794 Al-electr. capacitor 100 µF/35 V
C 307 309 413 485 Al-electr. capacitor 100 µF/25 V
C 312/313 309 413 481 Al-electr. capacitor 100 µF/35 V
C 316/1316 309 410 641 Al-electr. capacitor 4.7 µF/25 V
C 317/1317 309 411 654 Al-electr. capacitor 10 µF/35 V
D 301/303/304/305/1301 309 325 027 diode 1 N 4148
IC 301/1301 309 368 212 IC HA 1457
L 301/302/1301/1302 309 249 053 RF choke
S 301 309 639 004 rotary switch
T 301/1301 309 001 211 transistor BC 550 B
T 302/303 309 001 812 transistor BC 237 B
AF Switch Board
Position Order No. Designation
BS 5350 349 362 013 AF switch board
S 301 309 639 986 toggle switch 3 x UM
S 302/303 309 639 980 toggle switch 2 x UM
S 304/306 309 639 972 toggle switch 2 x UM
FM Mixing Board
Position Order No. Designation
BS 5606 349 350 925 FM mixing unit with AM tuning capacitor
C 603/604/607/608/613/614 309 500 967 tuning capacitor
C 625 309 461 703 Ta-electr. capacitor 22 µF/6.3 V
D 601 309 327 956 diode SMV 709
D 602 309 325 027 diode 1 N 4148
L 601 309 209 930 antenna coil
L 602 309 209 931 pre-circuit coil
L 603 309 219 935 oscillator coil
L 604/606 309 249 171 IF pre-circuit coil 2
L 605 309 250 943 RF choke
T 601 309 005 007 transistor 2 SK 55 D
T 602/603 309 001 933 transistor BF 241
LED Indication
Position Order No. Designation
BS 5730 349 395 022 LED indication for field strength
532 309 900 292 diode holder, 12-fold
533 309 651 974 sockets bar, 5 contacts
D 701-710 309 327 053 LED CQY 85 red
D 711 309 327 022 LED FLV 110 red
IC 701 309 368 230 IC U 244 B
IC 702 309 368 231 IC U 254 B
Speaker Switch Board
Position Order No. Designation
BS 5773 309 369 988 speaker switch board
BU 407/408 309 671 961 headphone sockets board
535 309 671 963 speaker socket, 4-fold
536 309 382 025 push button assembly, 2-fold
537 309 981 716 reverting spring for push button assembly
S 401/402 309 640 986 chamber switch, 12-fold
Mechanical Parts
Position Order No. Designation
538 309 863 988 frame chassis
539 309 943 014 shaft
540 309 943 015 drive shaft
541 309 927 911 flywheel
542 309 926 715 cord roller B 10
543 309 926 713 cord roller B 21
544 309 926 983 cord disc
545 309 926 808 tension roller
546 309 981 802 spring for tension roller
547 309 870 925 dial cord
548 309 823 013 pointer
549 309 921 913 switch rod with knob, black for mains switch
550 309 921 920 switch rod with knob for mains switch
551 309 928 904 clutch
552 309 921 913 switch rod
553 309 928 904 clutch
AF O/P Amplifier Module
Position Order No. Designation
BS 5420 349 364 970 AF o/p amplifier board
BS 5402 309 370 953 AF preamplifier board
521 309 651 976 sockets bar, 7 contacts
C 402 309 412 674 Al-electr. capacitor 47 µF/40 V is.
C 403 309 410 634 Al-electr. capacitor 4.7 µF+150-10%/35 V
C 406 309 413 515 Al-electr. capacitor 100 µF/16 V
C 406/1408 309 413 481 Al-electr. capacitor 100 µF+100-10%/35 V
C 412/422/1412/1422/1519 309 414 796 Al-electr. capacitor 1500 µF/70 V
C 512 309 414 662 Al-electr. capacitor 22 µF+150-10%/35 V
C 517 309 414 770 Al-electr. capacitor 470 µF+50-10%/40 V
C 518/519 309 414 798 Al-electr. capacitor 2200 µF/70 V
D 401 309 325 927 diode 1 N 4148
D 502/503/504/505 309 327 008 diode MR 751
FU 501 309 627 910 fuse T 630 mA
FU 502/1502 309 627 916 fuse T 2.5 A
GR 501 309 320 928 rectifier B 300 C 400 A 5
IC 501/502 309 368 130 IC UA 78 GU 1 C
L 401/501/502 309 249 053 RF choke
R 419/1419 309 504 805 variable resistor 500/1/0.15 W
S 401 309 639 996 thermo switch, 1-fold
T 401/1401 309 001 241 transistor BC 238 C
T 402 309 001 224 transistor BC 559 B
T 403 309 001 235 transistor BC 549 B
T 404 309 001 206 transistor BC 546 B
T 405/1405 309 001 216 transistor BC 546
T 406/1406 309 001 264 transistor BDV 65 A
T 407/1407 309 001 265 transistor BDV 64 A
T 408 309 001 204 transistor BC 238 B
309 653 501 fuse holder

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©2002 Alfred Arnold, alfred@ccac.rwth-aachen.de