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en:se-301 [2019/12/02 12:10] (aktuell) – angelegt - Externe Bearbeitung 127.0.0.1
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 +====== SE-301: Fahrbar Schwere Funkstation ======
 +**Fahrbar Schwere Funkstation **, **F.S.**; made by [[Telefunken]].
  
 +The **Fahrbart Schwere Funkstation F.S.25**, which was developed by [[Telefunken, Berlin]] in 1923/24, was one of the earliest mobile wireless stations which could operate in telephony mode. Four stations were acquiered in 1925/28 and handed over to the Signals Kp 5 in 1937.
 +
 +{{:images:se-301-fs25-stationswagen.jpg?direct&600|SE-301: F.S. 25}}
 +
 +===== Technical Specifications =====
 +  * [[Principle]]: Wireless station consisting of a separate [[transmitter]] and [[receiver]]:
 +    * [[Transmitter]]: Telefunken Spez 219Bs; [[Frequency Range]]: 99 - 857 kHz
 +    * [[Receiver]]: Telefunken Spez 7Bs ([[E25]]) (from 1925 on): dual tubed circuit reflex receiver
 +    * [[Receiver]]: Telefunken Spez 470Bs ([[E31]]) (after 1933): three tuned circuit TRF receiver
 +  * [[Modes]]: [[A1|A1 (CW)]], [[A2|A2 (modulated telegraphy)]], [[A3|A3 (AM telephony)]]
 +  * [[Frequency Range]]: see above
 +  * [[Sensitivity]]: [[A3 | AM (A3)]] / [[selectivity]]
 +  * [[Output Power]]: [[A1]] 200 W / [[A3]] 70 W
 +
 +==== Power Supply ====
 +  * [[Generator]]: Siemens generator (100 V, 500 Hz, 20A and 50V, 12 A) powered by a petrol engine.
 +
 +==== Dimensions ====
 +  * Apparatus trailer 1100 kg, machine trailer 1300 kg and mast trailer 1400 kg
 +
 +==== Accessories ====
 +  * **Antenna material**: Usually the mobile heavy radio station F.S. / SE-301 operates on a 60 m T / L - antenna on two 12 m  masts or an umbrella antenna.
 +
 +===== Station Material =====
 +{{:images:se-301-fs25-old-bw.jpg?direct&600|S.M.25 - Station equipment}}\\ 
 +SE-301 Apparatus Trailer with the E25 / Spez 7Bs \\ 
 +// Photograph published by R. Ritter //
 +
 +{{:images:se-301-fs25-new-bw.jpg?direct&600|S.M.25 - Station equipment}}\\ 
 +SE-301 Apparatus Trailer with the E31 / Spez 470Bs \\ 
 +// Photograph published by R. Ritter //
 +
 +The station consists of three uniaxial trailers, an apparatus trailer with the transmitting and receiving equipment, a "machine" trailer (with the generator) and a mast trailer.
 +
 +The **Telefunken transmitter** Spez 219Bs is tunable from 350 - 3025 m (99 - 857 kHz). In the transmitter, the valves [[de:RS55]], two [[de:RS19]] and a rectifier [[de:RG64]] are used.
 +
 +The station has a maximal output power of 200 W in contiuous wave telegraphy (A1) and 70 watts in modulated telegraphy and telephony. The 500 Hz alternating current is used to generate the 1000 Hz audio frequency for modulated telegraphy after rectification.
 +
 +As **receiver**, first a Telefunken **Spez 7Bs** (receiver [[E25]]) (two [[de:RE062t]]) with a two-stage audio amplifier Spez 60Bs was used; in 1933 it was replaced by the Telefunken **long wave receiver Spez 470Bs** / [[E31]], the three tuned circuit TRF receiver has a frequency coverage of 100 - 1091 kHz in four ranges, it is equipped with six valves [[de:RE074n]].
 +
 +===== Technical Principle =====
 +
 +
 +==== Valve Layout ====
 +
 +
 +==== Development ====
 +The Fahrbar Schwere Funkstation F.S. was developed by [[Telefunken, Berlin|Telefunken GmbH, Berlin]] in around 1923/4 and was delivered to the troupe in 1924/5, a total of four stations were acquired.
 +
 +Usually, the station was moved as a trailer train of two or three carriages, after the apparatus trailer (1100 kg) follows the "machine" trailer (with the generator, 1300 kg) and a mast trailer (1400 kg). The maneuvering characteristics of the prototype vehicles with theiur solid rubber tires reminiscent of cavalry times were at least "challenging".
 +
 +==== Field use ====
 +Initially, one signal company Kp 1 to 3 was assigned to each of the Army Field Corps, each company was equipped with one "Fahrbar Schwere Funkstation"; they served as a link between the general staff of the army field corps.
 +
 +In 1937, the F.S. used for command communication was assigned to signal Kp 5. In "active service" during the years of Second World War, the station was converted to portable use in transport crates, to which after 1951 the designation **SE-216** was assigned .
 +
 +The four stations saw their last use as **SE-301** after 1951 with the Landsturm Fk Kp 57/58 until it's liquidation in 1956.
 +
 +{{:images:se-301-fs25-fahrt.jpg?direct&600|F.S.25 unterwegs}}\\ 
 +F.S. 25 on the move\\ 
 +//Image found at the Website of O'Neills Electronic Museum//
 +
 +{{:images:se-301-fs25-biasca.jpg?direct&600|F.S.25 in Stellung bei Biasca}}\\ 
 +F.S. 25 in position near Biasca\\
 +//Image found at the Website of O'Neills Electronic Museum//
 +
 +{{gallery>:images?se-301*.jpg&0&80x80&lightbox&showtitle&titlesort}}
 +
 +===== Technische Unterlagen =====
 +
 +==== Weitere Informationen ====
 +  * [[http://armyradio.ch/radio-d/se-301.htm|SE-301 on www.armyradio.ch]]
 +  * [[https://www.hamfu.ch/de/geraete/geraet.php?id=101|SE-301 on Hamfu Website]]
en/se-301.txt · Zuletzt geändert: 2019/12/02 12:10 von 127.0.0.1