Aircraft radio Socrat ER 3 A

Socrat 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-027 / Socrat
SE-051 / Omera
SE-054 / Magnavox
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überarbeitet am 3.1.2013

The Socrat ER 3 A got the military designation SE-027. The Swiss Air Force Alouette III helicopters built by Sud Aviation came with these aircraft radios installed.


100 - 156 MHz,

Telephony A3, pout xx W

Receiver section superhet, IF 9,72 MHz


up to twenty crystal controlled channels crystal, power supply from 27,5 Volts on-board system via a rotary transformer, rod antenna.

The Socrat ER 3 A is a compact VHF aircraft transceiver built up with valves, is is powered by the helicopter's on board 27,5 V electric system, the high voltages for plate and grids is generated in a rotary transformer.

The VHF radio Socrat / SE-027 was installed in helicopters Alouette III of the Swiss Air Force, it was in use during the years 1964 - 1976.

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: Socrat ER.9.A in the www.autophon-museum.ch

© 3.1.2013 Martin Bösch