====== SE-204 ======
**SE-204 Radiovox**; manufactured by [[Autophon|Autophon AG, Solothurn]].

[[Autophon]] developed an adapted variant of the frequency-modulated transceiver [[SE-203]] to be used for connections between the fire control radar system Mk VII and the regimental headquarters in the early fifties.

{{:images:se-204.jpg?direct&600|SE-204}}
===== Technical Specifications =====
  * [[Principle]]: [[Transceiver]], Receiver: [[Single conversion]], [[IF]] 4.3 MHz
  * [[Modes]]: [[F3|FM (F3) or phase modulation G3E]]
  * [[Frequency Range]]: 80 - 87.5 MHz (four crystal controlled channels)
  * [[Sensitivity]]: [[F3|FM (F3)]] / [[selectivity]]
  * [[Output Power]]: 25 W

==== Power Supply ====
  * [[Mains]]: the station's transmitters and receivers can be powered from 220V AC mains.

==== Dimensions ====
  * Transmitter and receiver each 390 x 215 x 218 mm, approx. 60 kg

==== Accessories ====
  * In the mobile stations at the fire control radar systems, a vertikal antenna A 78 Spez was used.
  * At the regimental or section headquarters, a remote long distance antenna FA 78 was used.
  * 
===== Operation =====
{{ :images:se-204-front.jpg?direct&400|SE-204}} The station consists of one transmitter S 78 NU and two receivers E 78 NU; a control unit K 78 A is used to remotely control via a 50 m cable.

===== Technical Principle =====

==== Tube Layout ====

==== Development ====
The radio station Radiovox was developed by [[Autophon]] in around 1951/52, it was used by police forces and the Air Force. As [[SE-203]], this station was adapted for communication with the aircraft command vehicle (FLEIW) and as SE-204 for communication with the fire control radar.

==== Mission ====
The eight stations were used by anti-aircraft units, four stations located at the regimental headquarters and four stations in the fire control radar Mk VII sites.

{{gallery>:images?se-204*.jpg&0&80x80&lightbox&showtitle&titlesort}}

===== Technical Documentation =====

==== Additional Information ====
  * [[https://www.hamfu.ch/de/geraete/geraet.php?id=233|SE-204 (Radiovox) on Hamfu website]]