en:se-214
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+ | ====== SE-214: Portable Radio Station 18/25 ====== | ||
+ | **Portable Radio Station 18/25**, **T.S.25** (" | ||
+ | In the years of the First World War, when very broadband spark transmitters were used and the insufficient selectivity of the receivers could not pick out a wanted signal from the general wave chaos, H. Bredow developed a valve transmitter. General Staff Colonel Hilfiker managed to organize wireless equipment to be brought for testing to Switzerland, | ||
+ | |||
+ | In the following years, the station material of the " | ||
+ | |||
+ | {{: | ||
+ | |||
+ | ===== Specifications ===== | ||
+ | * [[Principle]]: | ||
+ | * [[Modes]]: [[A1|A1 (CW)]] | ||
+ | * [[Frequency Range]]: approx. 166 - 1000 kHz | ||
+ | * [[Sensitivity]]: | ||
+ | * [[Output Power]]: 7-10 W (ARS68) to 20 W (AR245) | ||
+ | |||
+ | Configuration **1918** | ||
+ | * [[Transmitter]] ARS68 from [[Telefunken]] | ||
+ | * [[Receiver]]: | ||
+ | |||
+ | Configuration **1922** | ||
+ | * [[Transmitter]] ARS68 from [[Telefunken]] | ||
+ | * [[Receiver]]: | ||
+ | |||
+ | Configuration **1925** | ||
+ | * [[Transmitter]] AR125 from [[Telefunken]] | ||
+ | * [[Receiver]]: | ||
+ | |||
+ | {{ : | ||
+ | Configuration **1926** | ||
+ | * [[Transmitter]] AR245 from [[Telefunken]] | ||
+ | * [[Receiver]]: | ||
+ | |||
+ | Configuration **1932** | ||
+ | * [[Transmitter]] AR245 from [[Telefunken]] | ||
+ | * [[Receiver]]: | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | * [[Generator]] Petrol generator MAG 2C36, 12-24V 6A and 800V 0.1 A or rotary rotary generator for emergency operation | ||
+ | * for the receiver accumulators 6 V and plate batteries | ||
+ | |||
+ | ==== Dimensions ==== | ||
+ | * various | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | * The standard antenna used was a 50 m L or T antenna between two 9 m masts. | ||
+ | |||
+ | ===== Station Material ===== | ||
+ | The transmission branch of the Meissner transmitter US17/D resp. ARS 68b of the original " | ||
+ | |||
+ | In 1925 it was replaced by the newly developed transmitter AR125; with two triodes [[de:RS5]] this had an antenna ouput power of 15 watts. From 1926 on, the slightly improved transmitter AS245 was used, with it's two triodes [[de:RS55]] it achieved an antenna output power of 20 W, the operating range was specified as 50 - 75 km. | ||
+ | |||
+ | {{ : | ||
+ | ---- | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | The standard antenna material was a two-wire 50 m L or T antenna between two 9 m high masts. The entire station came as 18 payloads, with a total of 336 kg, the station was conditionally " | ||
+ | |||
+ | ===== Technical Principle ===== | ||
+ | see description of the individual devices | ||
+ | |||
+ | ==== Tube Layout ==== | ||
+ | * **Transmitter** | ||
+ | * in the **ARS68b** a transmission triode [[de:RS5]] | ||
+ | * in the transmitter **AR125** two triodes [[de:RS5]] | ||
+ | * in the transmitter **AR245** two triodes [[de: | ||
+ | * **Receiver**: | ||
+ | |||
+ | ==== Development ==== | ||
+ | The German Telefunken society for wireless telegraphy, Berlin, " | ||
+ | |||
+ | In a first step to improve the station' | ||
+ | |||
+ | The next step of renewal of the station was the replacement of the transmitter part by a AR125 transmitter in 1925 and by a AR245 transmitter with a slightly higher output in 1926. Then the receiver Telefunken Spez 7Bs with dual tuned circuits and an external AF amplifier Spez 60Bs and from 1932 the receiver Spez 470Bs / [[E31]] was used. | ||
+ | |||
+ | According to the documentation "radio stations of the army", initially 56 sets were purchased for a price of 16' | ||
+ | |||
+ | ==== Field Use ==== | ||
+ | {{: | ||
+ | |||
+ | {{gallery>: | ||
+ | |||
+ | ===== Technische Unterlagen ===== | ||
+ | |||
+ | ==== Weitere Informationen ==== | ||
+ | * [[http:// | ||
+ | * [[https:// | ||
+ | * [[https:// | ||
+ | * [[https:// |
en/se-214.txt · Zuletzt geändert: 2019/12/02 08:22 von 127.0.0.1