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en:se-111 [2019/12/01 12:00] (aktuell) – angelegt - Externe Bearbeitung 127.0.0.1
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 +====== SE-111: Small Decimeter Station "K-Dm" ======
 +**Small decimeter station**; manufactured by [[Hasler|Hasler AG, Bern]].
  
 +In 1941, a low power radi oset operating in the UHF range was developed by the Bern based company [[Hasler|Hasler AG]] and was introduced with the troupe in 1942/3 after some problems with the early sets have been cured. Since the device with the odd-shaped antenna could only used for point-to-point - coommunication in optical distance, it was used only in isolated occasions.
 +
 +===== Technical Specifications =====
 +{{ :images:se-111-k-dm.jpg?direct&250|}}
 +  * [[Principle]]: [[transceiver]]
 +  * [[Modes]]: [[A3|AM (A3)]]
 +  * [[Frequency Range]]: 440 - 520 kHz, tunable
 +  * [[Sensitivity]]: [[A3|AM (A3)]] / [[Selectivity]]:
 +
 +==== Power Supply ====
 +  * [[Accumulator / batteries]]: Accumulators
 +  * [[Generator]]: pedal generator
 +
 +==== Dimensions ====
 +
 +==== Accessories ====
 +  * Standard antenna is a double - quad antenna
 +
 +===== Operation =====
 +{{:images:se-111-k-dm-seitl.jpg?direct&200 |}} The manpack set is built into a sheet steel cabinet, it can be operated with an accumulator pack or from a pedal generator.
 +
 +The double-quad antenna is plugged in the socket on top of the cabinet. A canvas pocket is used to store the accessories, the hand microphone, throat microphone and the headphones.
 +
 +The few control elements are located on the right front side, the measuring instrumentcan be set co control the valve heaters and plate voltage.
 +
 +===== Technical Principle =====
 +
 +==== Tube Layout ====
 +
 +==== Development ====
 +{{ :images:se-111-k-dm-bw.jpg?direct&300|}} After in 1938 experiments with a decimeter device made by the German company [[Lorenz]], it was apparently the "Elster" set, had been done, the KTA in 1941 made a contract to construct a portable one - channel decimeter set with Hasler AG in Bern.
 +
 +==== Mission ====
 +From the decimeter station "K Dm", 42 sets of tha manpack variant with internal designation H223b and 30 sets of a slightly bigger but technically largely identical set with the internal designation H249 in a die-cast housing for use in fixed installations in fortresses "(K-Dm fortress") were acquired.
 +
 +The "K-Dm" decimeter station was introduced with the troops in 1942/3 and came out of service around 1950.
 +
 +The manpack station was used by Fk Kp, the K-Dm fortress station with it's remote double quad antenna for fixed connections between artillery bunkers. In 1978, this material was also liquidated.
 +
 +Almost at the same time, [[Brown Boveri]] got a contract to develop the higher powered decimeter station "[[SE-213|TLD]]" ([[SE-213|"Portable Light Decimeter"]]). Because for this microwave station only a very small number of multi-channel interfaces were acquired, this station met hardly any higher requirements than the "K-Dm", so even this station was mainly used for individual "point-to-point" connections.
 +
 +{{gallery>:images?se-111*.jpg&0&80x80&lightbox&showtitle&titlesort}}
 +
 +===== Technical Documents =====
 +  * none available
 +
 +==== Additional Information ====
 +  * [[http://www.armyradio.ch/radio-d/se-111.htm|SE-111 / K-Dm auf www.armyradio.ch]]
en/se-111.txt · Zuletzt geändert: 2019/12/01 12:00 von 127.0.0.1