Analog Tuner
1981
(taken from the user's manual)
| FM Receiver | |
|---|---|
| Wave Band: | 87.5 - 108 MHz |
| Circuits: | 12, 4 adjustable |
| Sensitivity: | <0.9 µV at 75 Ohms |
| (26 dB/40 kHz deviation) | |
| Limit Range: | <1.2 µV for -3 dB at 75 Ohms |
| Intermediate Frequency: | 10.7 MHz |
| IF Bandwidth: | 150 kHz |
| Selection: | 60 dB (2 signal method) |
| Mirror Selection: | >75 dB |
| Capture Ration: | 2 dB |
| Phase Suppression: | >60 dB |
| Carrier Signal Suppr.: | >60 dB |
| Frequency Response: | 22 Hz - 15.0 kHz |
| Distortion Factor: | <0.5 % stereo |
| <0.3 % mono | |
| Cross Talk Dampening: | 40 dB |
| Voltage Ratio: | >64 dB stereo |
| >66 dB mono | |
| S/N Ratio: | >62 dB stereo |
| >66 dB mono | |
| Range of Strength Display: | 1 µV - 2 mV |
| Stereo Threshold: | ~5 µV at 75 Ohms |
| AM Receiver | |
| Sensitivity: | 10 µV at 600 kHz |
| (at 1 kHz 30% Modulation) | |
| Wave Band: | MW 520 - 1610 kHz |
| Circuits: | 5, 2 adjustable |
| Intermediate Frequency: | 460 kHz |
| IF Bandwidth: | 4.2 kHz |
| Voltage Ratio: | 53 dB at U = 10 mV, |
| 1 kHz, 30% Modulation | |
| Range of Strength Display: | 20 µV - 50 mV |
| General | |
| Components: | 4 Integrated Circuits |
| 15 Transistors | |
| 12 Diodes, 7 LEDs | |
| Mains Connection: | 220/110 V |
| Fuses: | 1 x T 630 mA |
| 1 x T 315 mA | |
| 1 x T 100 mA | |
| Dimensions: | 435 x 56 x 250 mm |
| Weight: | ~ 3.5 kg |
Believe it or not - corrosion! Below is a common picture of an RT100 that has been in service for more than 15 years:
The most probable reason for this corrosion is the light bulb that illuminates the frequency display. There is almost no clearing above the lamp, which means that the cover becomes very hot at this place. All chemical reactions, including corrosion, increase their speed when the temperature increases...of course, the lamp (~12V) is also burned in most cases and needs a replacement. I usually use a standard E10-socketed bulb and solder the cables to the bulb. It may also be necessary to replace the ring of green transparent plastic foil that makes the illumination look greenish. However, it is also possible to leave it out; the illumination won't be green any more, but still looks good (as in the device shown above...).
(taken from Telefunken's 1981-1991 Service Handbook)
| ICs, Transistors, Diodes | |
|---|---|
| Transistor 3SK59GR | 339 556 438 |
| Misc. Electrical Parts | |
| 12V Lamp | 339 560 306 |
| Documents | |
| Service Information | 339 407 135 |
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