en:se-403
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+ | ====== SE-403: M1K ====== | ||
+ | **Motorized shortwave station**, **M1K** or **SE-403**; developed by [[Telefunken Berlin]], manufactured by [[Telefunken|Telefunken, | ||
+ | The motorized shortwave station M1K was developed by [[Telefunken Berlin]] GmbH in 1941 - 1944, it was called Telefunken shortwave station 1122B.\\ | ||
+ | In Switzerland, | ||
+ | |||
+ | {{: | ||
+ | |||
+ | ===== Technical Specifications ===== | ||
+ | * [[Principle]]: | ||
+ | * [[Transmitter]]: | ||
+ | * [[Receiver]]: | ||
+ | * [[Modes]]: [[A1|CW (A1)]], [[A2|Modulated telegraphy (A2)]], [[A3|AM (A3)]], high speed telegraphy | ||
+ | * [[Frequency Range]]: 3 - 35 MHz | ||
+ | * [[Sensitivity]]: | ||
+ | * [[Output Power]]: [[A1|A1 (CW)]] 1000 - 1400 W resp. [[A3|A3 (AM)]] 300 - 350 W | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | * [[Generator]]: | ||
+ | * [[Mains]]: three-phase current 380/220 V, 15 kVA | ||
+ | |||
+ | ==== Dimensions ==== | ||
+ | * Saurer M6 station vehicle: 6 x 2.2 x 3.2 m; Length with trailer 9.4 m; Weight 9350 kg + generator trailer 2095 kg | ||
+ | * Saurer 2CM station vehicle: 6.6 x 2.3 x 3.2 m; Length with trailer 10 m; Weight 9100 kg + generator trailer 2095 kg | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | {{ : | ||
+ | * The **standard antenna** on the truck was the roof antenna, later a rod antenna was used while driving. | ||
+ | * For fixed operation, a 12 m umbrella antenna or even an elaborate 35 m umbrella antenna could be erected, it could be operated at a distance of 65 m from the station vehicle. | ||
+ | |||
+ | ---- | ||
+ | {{: | ||
+ | ===== Station Equipment ===== | ||
+ | The first motorized high power radio station of the signal troops was built on a Saurer M6 truck chassis, the station vehicle had a weight of 9,350 kg, the diesel generator on the single-axle trailer another 2,100 kg. For duplex operation, the receiver had to be operated in a distant location, either remote controlled or in a separate signals vehicle. | ||
+ | |||
+ | The Telefunken - [[Transmitter]] As 3028 has a four stage construction, | ||
+ | Three [[de: | ||
+ | The station has an output power of 1000 - 1400 W in CW telegraphy (A1) and 300 - 350 watts in modulated telegraphy and telephony. | ||
+ | |||
+ | Initially, the Autophon [[sm46]] all-wave receiver was used as main receiver, it is equipped with a turret tuner and a calibrated frequency dial and exclusively with battery valves [[D1F]] are used.\\ | ||
+ | Later, the autophone [[E-627]] was used as station receiver. | ||
+ | |||
+ | Initially, a vehicle roof antenna was used with the M1K / SE-403, later it was replaced by a rod antenna. A 12 m umbrella antenna or a half-wave long-wire antenna was installed for fixed use. | ||
+ | |||
+ | The M1K / SE-403 was the first station of the Swiss Army to use high speed telegraphy " | ||
+ | It was only after the transgression to teleprinter operation with the [[ETK]] in 1955, when the requirements for station personnel in decoding Morse telegraphy were no longer necessary. | ||
+ | |||
+ | ===== Technical principle ===== | ||
+ | {{: | ||
+ | ===== Technical principle ===== | ||
+ | **Transmitter AS60**: In the **transmitter driver** a [[de:LS50]] works as oscillator, the following stage serves as a separation stage for frequencies from 3 - 6 MHz and as a doubler stage at operating frequencies of 6 - 12 MHz; the two variable capacitors of the tuning unit are in synchronicity. The signal is fed to the transmitter final stage, where another [[de:LS50]] works as a separation stage for frequencies below 12.5 MHz, in the frequency range 12.5 - 25 MHz, this stage again acts as a doubler stage. In the output stage two [[de: | ||
+ | |||
+ | In telephony, the transmitter is modulated via a three-stage amplifier (two [[de: | ||
+ | |||
+ | ** Receiver**: see [[sm46]] resp. [[E-627]] | ||
+ | |||
+ | ==== Valve layout ==== | ||
+ | {{ : | ||
+ | V6, V7 (two [[de: | ||
+ | Stabilizer [[de:STV 280/80]], iron hydrogen resistor 100 - 300 V, 150 mA. | ||
+ | |||
+ | ==== Development ==== | ||
+ | The **Motorized shortwave station M1K** was developed by [[Telefunken Berlin|Telefunken GmbH]] in Berlin from 1941, production began in 1944 and was delayed due to the war. Finally the transmitter was manufactured by [[Autophon]] under license as **AS60**; the Autophon - all-wave receiver [[sm46]] was used as main receiver. The antenna material had to be adapted to Swiss topography, [[Telefunken]] Zurich was responsible to install the station equipment in the vehicles. | ||
+ | |||
+ | ==== Field use ==== | ||
+ | From 1947 - 1951, 20 stations were constructed on the base of a Saurer M6 off-road truck at a unit price of CHF 330,000. An additional station was used in Bülach. | ||
+ | |||
+ | The M1K / SE-403 was used for command communications by the Signal Kp of the Field Corps and the Signal Kp of the Army. After the single sideband station [[SE-222]] in 1960 with the signal companies of the Field Corps, all M1K stations were transferred to Signal division 6 and after the radio teletype station [[SE-415]] was introduced, the stations were definitely withdrawn and liquidated in 1980. | ||
+ | |||
+ | {{gallery>: | ||
+ | |||
+ | ===== Technical Documentation ===== | ||
+ | * {{ : | ||
+ | |||
+ | ==== Additional Informations ==== | ||
+ | * [[http:// | ||
+ | * [[https:// | ||
+ | * [[https:// |
en/se-403.txt · Zuletzt geändert: 2019/12/14 08:56 von 127.0.0.1