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en:se-401 [2019/12/11 19:38] (aktuell)
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 +====== SE-401: Motorized Wireless Station 44 ======
 +**Motorized Wireless Station 44**, **M44** resp. **SE-401**; developed and produced [[Zellweger,​ Uster]].
  
 +The [[Zellweger]] Company, based in Uster, did develop the **Funkstation Kurz Lang 43** (Short Long Station 43) based on the components of the [[SE-300|FL40]] (Mobile Light Station 40) in the years 1943/44 to replace the Telefunken Short- / Longwave Station [[SE-217|Kurz - Lang - Station / D-Station]],​ of which because of the World War II, Telefunken was not able to provide a sufficient number.
 +
 +Now, the call for a motorized radio station was heard at [[Zellweger]]. In fact, the [[SE-300|FL40]] was mobile, but a separate vehicle was needed to tow the trailer. So [[Zellweger]] developed the **Motorized Radio Station M44**.\\ ​
 +The components of a standard [[FL40]] were installed in similar steel tube frames and with similar auxiliary equipment like in the KL43 in a light truck; In contrast to the KL43, the station was equipped with a crank mast at the rear of the truck, like the one found on the [[FL40]].
 +
 +{{:​images:​se-401-m44-fahrzeug.jpg?​direct&​600|SE-401 / M44 in Berna truck}}
 +===== Technical Specifications =====
 +  * [[Principle]]:​ Wireless station with separate [[transmitter]] and [[receiver]]
 +    * [[Transmitter]]:​ [[S-300]], Transmitter of the [[SE-300|FL40]]:​ [[Frequency Range]]: 0.19 - 0.715 MHz (in 3 ranges) and 1.5 - 4.5 MHz (in three ranges).
 +    * [[Receiver]]:​ [[E-601]] resp. [[E41]]: [[Double conversion]],​ [[IF]] 70/465 kHz, [[Frequency Range]]: 170 kHz - 24 MHz).
 +  * [[Modes]]: [[A1]] with BFO, [[A3|AM (A3)]], [[A3J|SSB (A3J]] with BFO
 +  * [[Frequency Range]]: Transmitter 190 - 7150 kHz and 1.5 - 4.5 MHz, receiver [[E41|E41 spec.]] 170 kHz - 24 MHz
 +  * [[Sensitivity]]:​ [[A1]] 2 μV, [[A3|AM (A3)]] 3 μV / [[selectivity]]:​
 +  * [[Output Power]]: [[A1]] 80 - 120 W, [[A3]] 25 - 35 W
 +
 +==== Power Supply ====
 +  * [[Generator]]:​ Three-phase generator Uster (50V, 150 Hz) to be driven from a gasoline or electric motor; while driving, the station is operated by the built-in generator in the truck.
 +
 +==== Dimensions ====
 +  * The van CR1D with the station material has a total weight of 5070 kg
 +  * The **transmitter** in it's tubular steel frame has a weight of 75 kg 
 +  * The **receiver** in it's steel tube frame has a weight of 75 kg
 +
 +==== Accessories ====
 +  * While on the move, a **roof antenna** is used.
 +  * For fixed operation, a **14 m telescopic mast** (same as with the [[FL40]], mounted to the truck) is used
 +  * Alternatively,​ a **longwire antenna** can be erected, for operation on **longwaves** 50 m in length, mounted between two 10 m masts.
 + * The motorized radio station 44 is equipped for **remote operation**. On the receiver side, a remote control unit with a tone generator is installed in the receiver frame. On the transmitter side, a similar device, the **TTG** ("​Tontastgerät"​) is connected in the telephone line between the transmitter and the remote control post. The modes telephony, telegraphy (with a 900 Hz filter) and a service phone connection between remote post and the receiver / transmitter site can be selected.
 +
 +===== Station Material =====
 +The **Motorized radio station 44**, abbreviated M44, is a wireless station built into a Berna truck. It consists of the transmitter and receiver components of the FL40. Thanks to the power supply from a built-in car generator and the roof antenna, the station can be operated while driving.
 +
 +The station is quite similar to the [[SE-218|Short-long station 43 / "​G-station"​]] of the Air Force; in contrast to the KL, the standard components of the normal [[FL40]] with their frequency range were used.
 +
 +The **transmitter** is the reliable [[S-300|FL40 transmitter]],​ similar to the [[SE-218|KL43 / G-Station]],​ the transmitter is installed in a steel tube frame.
 +
 +The frequency ranges 190-240 / 240-400 / 400-715 kHz in the longwave range as well as 1.5-2.3 / 2.3-3.3 and 3.3-4.5 kHz in the shortwave range are covered. By means of a quartz crystal, the transmitter can be calibrated on the frequency of 4000 kHz.
 +
 +The transmitter has three stages, a [[de:​EBL21]] in the oscillator / exciter stage, two [[de:​EBL21]] in frequency doubler stage and two [[de:​OS41/​1250]] in the power amplifier stage. Operation modes are A1 (CW), A2 (modulated telegraphy) and A3 (telephony);​ the modulator stage ([[de:​EBL21]]) acts on the grids of the power amplifier stage. The output power is switchable, in position „Einpfeifen“ ("​tune"​) / „Low“ it is 5 - 7 Watt, in position „Medium“ 20 - 30 W and in position „High“ 80 - 120 W.
 +
 +The plate voltage of 330 V in the exciter / modulator stages and 1200 V in in the power amplifier stage is generated from the three phase 50V / 150 Hz voltage via a transformer and four [[de:PV 200/600]] rectifier valves.
 +
 +**Receiver** is the proven [[E-601|Uster / E41 All wave receiver]], but only the 200 kHz - 24 MHz ranges are covered with seven coil inserts. A station clock is mounted to the right of the frequency coil.
 +
 +The truck Berna CR1D is equipped with a 65 hp four-cylinder diesel engine and with the built-in wireless station, it has a weight of 5070 kg. The vehicle is equipped with a three-piece L - roof antenna to operate thestation on the move. For shortwaves, a 14 m crank mast Magirus, similar to the one found in the [[FL40]] is used, and for fixed operation for shortwave a 8 m  and for longwaves 50 m long wire antenna between two 10 m masts is used.
 +
 +As with the [[FL40]], the power is supplied via a gasoline or mains motor-fed converter group, which provides the 50 V / 150 Hz three-phase current. During driving, the converter is fed by the car generator.
 +
 +===== Technical Principle =====
 +description above
 +
 +==== Valve layout ====
 +description above
 +
 +==== Development ====
 +==== Entwicklung ====
 +Von der Funkstation M44 wurden 1943/44 vier Stationen entwickelt und zu einem Stückpreis von 105'​000.- Fr. der Truppe "zu Versuchszwecken"​ übergeben, sie wäre Ende des Zweiten Weltkriegs zur Beschaffung in grösserer Anzahl bereit gewesen.
 +
 +==== Einsatz ====
 +Als Einzelstationen waren die vier Stationen M44 der Leichten Kompanie der Funkerabteilung 6 bis zur Einführung der Truppenordnung 61 zugeteilt, sie wurden 1963 durch SE-222 ersetzt und 1967 liquidiert.
 +
 +
 +==== Development ====
 +Four stations of the wireless station M44 were constrcted in 1943/44, and these were handed over to the troops "for experimental purposes"​ at a price of 105'​000.- Fr. Everything has been prepared to produce this station in larger numbers at the end of the Second World War.
 +
 +==== Mission ====
 +The four stations M44 were assigned to Signal Division 6 as individual stations. When troop order 61 was introduced, they were replaced by [[SE-222]] in 1963 and were liquidated in 1967.
 +
 +{{gallery>:​images?​se-401*.jpg&​0&​80x80&​lightbox&​showtitle&​titlesort}}
 +
 +===== Technical Documentation =====
 +
 +==== Additional Information ====
 +  * [[http://​armyradio.ch/​radio-d/​se-401.htm|SE-401 / M44 on www.armyradio.ch]]
 +  * [[https://​www.hamfu.ch/​de/​geraete/​geraet.php?​id=108|SE-401 / M44 on Hamfu website]]
en/se-401.txt · Zuletzt geändert: 2019/12/11 19:38 von mb