My Telefunken Collection


TT 350



Device Type

Analog Tuner

Start of Sale

1979

General Description

The TT 350 was Telefunken's 1979 offer if all you wanted was a simple tuner that did it's job, in sharp contrast to the synthesizer-based TT 750. The 'main board' is the same one as in the TR 350 or the STT 1 / CM 20, and apart from this board, there is not much else in the standard case that was used for almost all components of that series. As a result, the case is almost empty and everything would easily fit into a fraction of this space...

Features

Variable Muting Level, Automatic Fine Tuning, Exact Tuning Indicator

Connectors

FM Antenna (symmetric + coaxial), AM Antenna, AF Output (both DIN an Cinch)

Technical Data

(taken from the user's manual)

Wave Ranges: FM = 87.5 ... 108 MHz
MW = 518 ... 1610 kHz
LW = 148 ... 325 kHz
Circuits: AM 5 / FM 9
Intermediate Frequency: AM 460 kHz / FM 10.7 MHz
IF Bandwidth: AM 4.5 kHz / FM 170 kHz
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 / > 59 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
Tuning Aids: Field strength indicating element
for AM/FM with LEDs, stereo indicator,
exact tuning indicator
Semiconductors: 6 Integrated Circuits
13 Transistors
12 LEDs
7 Diodes
1 Mains Rectifier
Mains Voltage: 220/110 Volts at 50/60 Hz
Fuses: Mains 220 V 1 x T 80 mA
110 V 2 x T 80 mA
Secondary T 315 mA
Dimensions: 460 x 145 x 350 mm

Common Failures

none known

Spare Part Numbers

(taken from the service manual)

Housing Parts
501 309 796 045 cabinet, brown
502 309 796 046 cabinet, black
503 309 770 920 cabinet foot
504 309 710 214 flood light dial for brown
505 309 710 215 flood light dial for silver
506 309 833 546 dial cover
507 309 833 545 front cover for brown
508 309 833 547 front cover for silver
509 309 831 713 light box for brown
510 309 831 714 light box for silver
511 309 809 952 toggle switch knob for brown
512 309 809 951 toggle switch knob for silver
513 309 802 114 tuning knob
514 309 802 115 control knob for range and input selector
515 309 833 535 knob cover
Electrical Parts
Position Order No. Designation
BS 5108 349 362 015 FM-AM-AF amplifier board
BS 5508 309 653 943 fuse board
BS 5517 309 310 142 mains transformer with fuse board
BS 5606 349 350 925 FM mixing unit with AM tuning capacitor
BS 5729 349 395 021 LED indicator for field strength
FU 1 309 627 917 fuse T 80 mA
D 103/107 309 327 022 LED FLV 110 red
LA 1 309 621 961 dial bulb 6-7 V / 300 mA
R 1 309 500 072 film variable resistor 10 kOhm
S 1 309 630 994 mains switch
S 3/4 309 639 009 toggle switch 1 x UM
520 309 601 701 FM antenna
521 309 603 807 AM antenna
522 309 695 935 power cord
AM-FM Switch Board
Position Order No. Designation
BS 5108 349 362 015 FM-AM-AF amplifier board with rotary switch
BU 101/S 101 309 670 923 AM antenna socket
BU 102 309 670 927 antenna socket, combined
BU 103 309 672 801 DIN socket, 5 pins
BU 104/105 309 679 503 cinch socket
C 113 309 450 605 disc trimmer A N 750 10 40/250V
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 136/165/184 309 413 482 al-electr. capacitor 100 µF/25 V
C 138/146 309 411 673 al-electr. capacitor 22 µF/10 V
C 141/161 309 410 634 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 177 309 414 737 al-electr. capacitor 2200 µF/40 V
C 182/183 309 410 688 al-electr. capacitor 1 µF/25 V
D 104/105/106 309 325 027 diode 1 N 4148
Fi 101 309 103 951 ceramic filter 1.10 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
FU 101 309 627 901 fuse T 315 mA
GR 101 309 320 602 rectifier B 30 C 350/250 KP
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
IC 104 309 368 130 IC UA 78 GU 1 C
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 LW
L 111 309 220 083 filter coil 18 MHz
L 112 309 220 046 filter coil 10.7 MHz
R 157 309 500 071 variable resistor 5 K 1 0.15 W
R 166 309 509 401 variable resistor 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 558 B
109
T 104 309 001 227 transistor BF 256 B
T 105/106 309 556 087 transistor BC 548 B
T 108/111/112 309 556 224 transistor BC 548 C
FM Mixing Unit
Position Order No. Designation
BS 5606 349 350 925 FM mixing unit with AM tuning capacitor
C 105/116/122 309 400 967 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
Fi 601 309 220 084 FM IF coil
L 601 309 209 930 FM antenna coil
L 602 309 209 931 pre-circuit coil
L 603 309 219 935 oscillator coil
L 604/606 309 249 171 IF 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 Indicator
Position Order No. Designation
BS 5729 349 395 021 LED indicator for field strength, 10-fold
530 309 900 292 diode holder, 12-fold
531 309 651 977 sockets bar, 4 pins
D 701-710 309 327 053 LED CQY 85 red
IC 701 309 368 231 IC U 254 B
IC 702 309 368 230 IC U 244 B
Mechanical Parts
Position Order No. Designation
535 309 863 988 frame chassis
536 309 926 713 cord roller
537 309 926 983 cord disc
538 309 926 808 tension roller
539 309 981 802 spring for tension roller
540 309 943 018 drive shaft
541 309 927 911 flywheel
542 309 870 925 dial cord
543 309 823 015 pointer
544 309 928 904 clutch
545 309 921 916 switch rod
546 309 653 501 switch rod

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