| TELEFUNKEN E 103 Aw |
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| General Coverage Communications Receiver |
| Double Conversion Superheterodyne |
| 9 Tubes + Semiconductors |
| Made in West Germany 1951 - 1961 |
| Specifications | |
| Coverage: | 103
- 254 / 245 - 590 / 554 - 1370 kHz
1.33 - 3.28 / 3.18 - 6.9 / 6.7 - 14.5 / 14.1 - 30.4 MHz |
| Modes: | AM/CW |
| Antenna Input: | Long wire below 3.28 MHz, 250 Ohms or 60 Ohms above 3.18 MHz |
| Sensitivity: | CW (1 kHz IF filter + 800 - 1000 Hz AF filter): 0.3(HF) - 0.5(LF) µV 6 dB S/N, AM (7 kHz filter): 3 µV 10 dB S/N |
| Setting & Read out: | 200
Hz/mm - 20 kHz/mm. Above 14.1 MHz app. 5 kHz
setting accuracy is possible using a magnifier on the linear scale (if the position is registered in a logbook) |
| Stability: | 5 kHz at 30 MHz after warm up under normal conditions |
| Selectivity | 16/12/7/3/1
kHz -6 dB, 200 Hz with AF Filter,
formfactor 6/60 dB 1:2,8 at 7 kHz |
| IF: | 1st IF: 950 kHz, 2nd IF: 70 kHz; single conversion below 1.33 MHz |
| IF Rejection: | > 60 dB at 0.11 MHz, >80 dB at 1.40 MHz |
| Image Rejection: | >60 dB below 0.590 MHz, >50 dB above 0.554 MHz, >60 dB above 1.33 MHz, > 50 dB above 6.70 MHz, >40 dB above 14.1 MHz |
| Audio Output: | 3 W/4.5Ohms |
| Voltages: | 90/110/127/200/220 VAC 50-60 Hz, 53 W |
| Physical: | 570x350x380mm, 40 kg |
| Features | |||
| - Head. Jack (2) | - Speaker | - Speaker Switch | - Line Out 600 Ohms |
| - AF Filter 0.8-1 kHz | - BFO +/-1.5 kHz | - S-Meter | - AGC/MGC |
| - RF Gain | - Dial Lamps | - Dual Conc. Knob | - Rack Handles |
| Circuit Complement and Variants |
| A
mechanical stabile receiver with a very big coil turret in order to avoid
cross modulation. Four ganged variable capacitors driven by a dual concentric
knob. 4 circuits for RF, 4 for 1st IF and 6 for 2nd IF.
EF 42 (>6 AM 6) RF Amp, ECH 42 (=6 CU 7) 1st mixer, EF 42 (>6 AM 6) for VFO in E 103 Kw/4 only, ECH 42 (=6 CU 7) FFO and 2nd mixer or as 1st IF Amp below 1.33 MHz, EAF 42 (=6 CT 7) IF Amp and AGC Rect, EAF 42 (=6 CT 7) IF Amp and detector, EAF 42 (=6 CT 7) BFO, ECL 11 (>6 BM 8) 1st AF Pre- and Power-Amp, STV 150/15 (150 V, 15 mA) voltage regulator for VFO in E 103 Kw/5 only. Selenium rectifiers in PS. E 103 Aw/4 (1952) for marine applications: low noise, high µ (85) tube EF 42 in RF amplifier, no AGC provided in order to obtain higher linearity and to reduce cross modulation. Additional EF 42 in VFO for better conversion conductance of 1st mixer tube ECH 42. E 103 Aw/5 (1953) for more convenient AM reception: biased AGC controls amplifying of EF 85 (=6 BY 7) replacing EF 42 in R stage. Only the triode of the 1st mixer tube ECH 42 is in use as a VFO. Two germanium diodes for ANL. |
| Comments |
| Originally designed at the end of the Forties as an universal single conversion receiver for different ranges. It was in use at postal service, press and police as well. Many receivers have been exported to France and Italy. |
| Additional Information |
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Block diagram of the E 103 Aw/4 (click to enlarge).
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Top view of the Telefunken E 103 Aw/5.
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Noval, rimlock and pre war tubes used in the E 103 Aw/5.
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Prototype of the Telefunken E 103 (1950).
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The following photo shows the E 103 in use on board of freighter "Franchina Fassio" (Callsign ICGO).
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Freighter "Franchina Fassio."
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