Aircraft Wireless Station FG IV
Stat 1005 a F, Telefunken AG, Berlin

Telefunken Logo
Swiss Army Communication Sets
Synoptic Table
Army Transceivers
Transceivers SE-0xx
(SE-001) / FG I
(SE-002) / FG II
(SE-004) / FG IV
(SE-009) / FG IX
SE-010 / FG X
S-011 / FG XI
SE-013 / SCR-522
SE-015 / STR.9X
SE-016 / Omera
SE-018/m / H-Stat.
SE-020 / Socrat
SE-023 / Collins
SE-051 / Omera
SE-054 / Magnavox
varia / copyright
about / contact

überarbeitet am 31.12.2012

The Aircraft Wireless Station FG IV has been ordered in 1937/38. The station based on Telefunken aircraft station Stat 1005a F has beeen produced under Telefunken licence by Telefunken Zurich.
The FG IV system has been installed in two-seater aircraft Fokker CV-E and C 35.

Transmitter / Receiver,

Receiver Telefunken E 406 F: 3000 - 6000 kHz

Transmitter Telefunken S 347 F: 3000 - 6000 kHz

A1 (telegraphy CW), A2/A3 (telegraphy modulated / telephony), pout 60 / 25 W



Antenna tuner, remote frequency control to select one of two mechanically preset frequencies by means of Bowden cables, dynamotor power supply; precision wave meter Spez 831 F

Based on the construction of Telefunken Aircraft Station Stat 1005a F (with it's components Transmitter As 82, Receiver Ae 83 and antenna tuner Al 84), Telefunken adapted the station slightly for the Swiss Air Force, it was introduced as FG IV. While the German station was intended to be used in single seat fighters (and had to be operated by the pilot himself), the station was installed in Switzerland only in two-seated airplanes and was operated by an oberserver / wireless operator.

As German industrie was switched for war production, the station has been produced under Telefunken licence in Switzerland: the transmitter was produced by Telefunken Zurich (Albiswerk), the receiver by Zellweger, Uster.

The receiver Telefunken E 406 F is a five valve (all NF4) superhet covering 3000 - 6000 kHz in the shortwave band.

The transmitter Telefunken S 347 F covers also 3000 - 6000 kHz in the shortwave range. In the modulator three (or four?) valves NF4 (later RV12P4000) are used, one of them as AF generator, two more as modulation amplifiers. One RS287 (RL12P35) is used in the driver stage and two more RS287 in the RF final stage. The output power is 60W in CW telegraphy and 25W in telephony.
At least in the Swiss variant, two mechanically pre-tuned frequencies could be selected by the help of Bowden cables.

The system is equipped with an antenna tuner.

The valve heaters are powered from the airplane's on board accumulator, the plate voltage of 600 - 800 V is generated by a dynamotor.

Both operation frequencies were mechanically pre-set from ground personnel, the used the high accuracy wave meter Telefunken Spez 831 F.
Wellenmesser FGIV Telefunken Spez 831F

There is some evidence, that the components of the FG IV have also been used as ground station with the designation Z-Station 38.
The aircraft station FG IV has been withdrawn together with the airplanes where they had been instelled in the years 1945 - 1954.

I would be very thankful for further information and images.

further information:
Information from the Swiss Air Force Museum Dubendorf, where the equipment is displayed.
d: Telefunken Datenblatt zur Sende- Empfangsanlage für Flugzeuge Stat 1005a F

© 31.12.2012 Martin Bösch