Torn. Fu. b1 |
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The Torn.Fu.b1 transceiver was introduced in 1936. It is one of the first models of the "new generation" of military radio devices developed during Germany's rearmament in preparation for WWII. The vacuum tubes in the Torn.Fu.b1 are the RV2P800 type. The Torn.Fu.b1 uses one filament battery (2,4NC38) and two 90 Volt anode batteries. Translated from: Based on he foundation of the Torn.Fu.a2 transceiver, the Lorenz firm designed a new portable transceiver in three variants.
The two-stage 1 Watt transmitter was constructed with a RV2P800 in the master oscillator stage and a RL2P3 in the power driver stage. The 6-tube super-heterodyne receiver used an RV2P800 in the HF, mixer, oscillator, IF, detector and LF stages. The transmitter, receiver and service unit were housed together in an "armored wood" case. The transceiver weighed 20 kg, just as much as the equally-sized battery accessory case. This accessory case also carried the antenna parts. A special device (Fernbesprechungsgerät bf) was used for interfacing with FF33 telephones. Which can be used to transmit over a 50 meter cable connected to a FF33 field telephone. This allows telephone links to be established between two Torn.Fu.* transceivers. The power source for this transceiver was the rechargeable filament battery 2B38 and two 90-volt anode batteries. The range was 25 km using A1 mode (CW) and 12 km on A3 mode (voice). These devices were later used on all fronts. They were easy to repair, and could be configured with several antenna configurations based on application (2,8 meter sectional antenna with a small (4 x 0,4 meter) or large (8 x 0,4 meter) antenna star, or as an alternate arrangement - a 12 - 15 meter wire antenna. These previous antenna combinations were for stationary operation. If these transceivers operated in vehicles, a roof antenna or a whip could be used. For bunker or fortress antenna systems, a special small antenna tuning device "Abst.a." was placed between the Torn.Fu.* device and external antenna.
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Specifications |
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FREQUENCY RANGE: |
Sender: 3 - 5 MHz. Empfänger: 3 - 7.67 MHz |
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NUMBER OF CRYSTALS: |
1 |
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PRESET FREQUENCIES: |
2 click-stops for transmitting |
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ANTENNA: |
Wire or rod. Low rod antenna-vertical portion of 3, and top portion of 8 antenna sections; high rod antenna-vertical, portion of 7 and top portion of of 4 antenna sections. High rod gives longer range. A 45 foot wire from set to tree can also be used. Set can be operated with an American 15 foot vehicular antenna. |
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TUNING:(MO OR CRYSTAL) |
Master Oscillator |
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SENSITIVITY: |
100 uV input for 1 mV output |
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SELECTIVITY: |
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POWER SOURCE: |
Batteries. For filament: 2,4 Volt storage cell; for plate: two 90 Volt anode batteries. |
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SIMILAR SETS : |
TFuG.k, Torn.Fu.c, Torn.Fu.f, SCR-511 |
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POWER OUTPUT:(WATTS) |
0.7 (approximately) |
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TUBES (TYPE and NUMBER): |
Transmitter: 2 x RV2P800 + 1 x RL2P3 Receiver: 6 x RV2P800 Quartz glow tube calibration crystal, which glows when the set is correctly calibrated. |
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USE: |
These are portable radio sets, and are intended for field service as pack sets. The transmitters can be modulated using ordinary field telephone lines. Satisfactory operation is possible over about 1.5 miles of field wire. |
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TYPE OF SIGNAL: |
Received: CW, tone and voice Transmitted: CW and voice (AM) |
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RANGE: (MILES) |
12 (CW), 6 (Voice) - approximately |
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TO COMMUNICATE WITH: |
TFuG.k, Torn.Fu.c, Torn.Fu.f, Torn.Fu.d2, and any other set with overlapping frequency range. |
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| TO REPLACE IN PART: | |||||||||||||||||
TRANSPORTATION: |
Pack sets to be carried by two men - one for the transceiver and the other for battery pack which houses also headphones, key, microphone, antenna gear and other accessories. The set also has a case containing equipment for remote voice operation. Not intended to be used while on the move. |
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The front of the unit. The paint is original. |
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Faceplate |
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Manufacture data and Waffenamt stamp. |
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Matching serial number on the case. |
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Ammeter and antenna connector. Antenna mode switch. |
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Cover off - aluminum covers on an Electrum chassis. |
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Top of the transceiver. |
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Left side of transceiver. Unscrew the three screws outlined in red, and you can pull apart the receiver, transmitter and lower modules. The whole transceiver is constructed out of modules that connect with male and female plugs. |
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Inside of the case. |
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