en:se-406
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+ | ====== SE-406 ====== | ||
+ | **Motorized shortwave station SE-406** or **Telefunken Stat 1125B**; manufactured by [[Telefunken|Telefunken - Albiswerke, Zürich]]. | ||
+ | Only [[Telefunken|Telefunken Zürich]] sent in a project on a call for projects for a high power shortwave radio station in 1949. In 1954, two prototypes of the radio station SE-406 were operational, | ||
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+ | Following the great success of the development of the [[Zellweger]] single-sideband station [[SE-222]], with which single-sideband technology gave nationwide coverage with relatively low transmitter power, no further SE-406 stations were procured. | ||
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+ | {{: | ||
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+ | ===== Technical data ===== | ||
+ | * [[Principle]]: | ||
+ | * [[Receiver]]: | ||
+ | * [[Transmitter]]: | ||
+ | * (transmitting) [[Modes]]: [[A1|CW (A1)]], [[A3|AM (A3)]] | ||
+ | * [[Output power]]: [[A1]] 400W, [[A3]] 250W | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | The station can be powered from mains or from a petrol generator: | ||
+ | * [[Mains]]: The station can be powered with 500 V or 3x380 V AC by means of mains transformer P1432. | ||
+ | * [[Generator]]: | ||
+ | |||
+ | The power supply of the station takes up a larger part in the technical manual. In the **Ap 3060** power supply unit, the necessary voltages are fed to the individual units. A three-phase AC source (mains supply or petrol generator) can be connected to the power supply **G 4017**, mains current 220 V 800 W or a 220 V generator can be connected directly to the power distribution unit. The AC transformer **P 1432** is used to transform the three-phase voltage from 500 V to the required voltages of 380/220 V. With the switching unit **Ap 3072**, the three-phase generator can be started or stopped from the operating room, a rectifier **Ms 434** is used to charge the accumulators for vehicle lighting and reception only while the transmitter is not operational. | ||
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+ | ==== Dimensions ==== | ||
+ | * Station vehicle 631 x 215 x 360 cm, 7887 kg | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | * Two **rod antennas** for reception and one rod antenna for transmission are be used as standard antennas. | ||
+ | * Alternatively, | ||
+ | * Transmitting and receiving operation is also possible via a **dipole antenna**, which has a length of 2 x 20 m on the lower frequencies and 2 x 10 m on the higher frequencies. | ||
+ | * Automatic **antenna tuner Ap 3073**: the output of the transmitter with an impedance of 70 ohms is adapted to antennas with different impedances, automatic " | ||
+ | * **Ap 3075 switching unit** | ||
+ | * with the **remote control Ap 3076** the station can be remote operated. It comes with a microphone amplifier and modulator oscillator tube. A microphone or microtel, a morse key or a Moser-Baer high speed telegrapy system graph or an [[ETK]] teleprinter can be connected. | ||
+ | |||
+ | ---- | ||
+ | {{: | ||
+ | ===== Station equipment ===== | ||
+ | The shortwave station SE-406 is constructed on a truck chassis **Saurer 2CM**, it is divided to a radio room with the transmitter and two receivers and a operation room with the [[ETK]] teleprinter and the [[TC53]] cipher machine | ||
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+ | The **Transmitter Ap 3062**, the automatic **Antenna tuner Ap 3063** with five preset frequencies and two | ||
+ | **Autophon [[E-627]]** receivers are located in the front part of the radio room. | ||
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+ | {{ : | ||
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+ | The **transmitter **is a plate modulated three stage transmitter, | ||
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+ | The semi-automatic antenna tuner (6) can be pre-tuned to the five crystal controlled frequencies; | ||
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+ | |||
+ | {{ : | ||
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+ | In the SE-406 station, newly developed radio teletype technology was fitted. The 14 segment teleprinter [[ETK]] together with the ciphering machine [[TC53]] from E. Gretener AG can be used for encrypted radioteletype operation. | ||
+ | |||
+ | ===== Technical principle ===== | ||
+ | The design of the transmitter closely follows the design of the BC-610 transmitter which was used in the [[SM46]], similar U.S. tubes were used. | ||
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+ | {{ : | ||
+ | |||
+ | In **telephony mode**, the microphone voltage is amplified in the microphone amplifier tube V56 ([[de: | ||
+ | In CW mode ([[A1]]), the keying relay R6 is addressed directly, with " | ||
+ | For teletype operation, the AF signal of the [[ETK]] or the keying tone from the remote control is also fed to the keying amplifier (V52b, V51a). | ||
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+ | The **modulation amplifier** consists of five stages: first the microphone or teletype signal is amplified (V57a ([[de: | ||
+ | |||
+ | The radio frequency is processed in the **transmitter rack**. The oscillator V201 ([[de: | ||
+ | Next is the **intermediate stage** V202 ([[de: | ||
+ | In the **transmitter final stage **, the two final tubes V251, V252 (each [[de: | ||
+ | |||
+ | In the **Antenna tuner Ap 3073**, the settings for five operating frequencies can be mechanically preset. With each frequency change, the antenna tuning is adjusted accordingly with motors. In the sixth position " | ||
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+ | The **antenna switching unit** allows to connect the corresponding antennas to the two receivers, the main receiver (Ap 3074) and the auxiliary receiver (Ap 3064). The receiving antennas are earthed during transmission to prevent overloading of the sensitive receiver input stages. | ||
+ | |||
+ | ==== Valve layout ==== | ||
+ | **Transmitter**: | ||
+ | |||
+ | ==== Development ==== | ||
+ | Only [[Telefunken]] responded to a call for proposals for a high power shortwave station. Finally, from the Stat. 1125B only a preliminary series of 15 stations was purchased, these stations were delivered in 1952/55 and were in use by the troops from 1953. The stations were operated by signalmen from Fk Kp 25 for command traffic between the Army HQ and the Army field corps. | ||
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+ | {{ : | ||
+ | |||
+ | ==== Field use ==== | ||
+ | The SE-406 station remained in use with the FunkerKp 25 until 1970 and was assigned to Landsturm signal companies until it was definitely withdrawn in 1980. | ||
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+ | {{gallery>: | ||
+ | |||
+ | ===== Technical Documentation ===== | ||
+ | |||
+ | ==== Additional Informations ==== | ||
+ | * [[http:// | ||
+ | * [[https:// |
en/se-406.txt · Zuletzt geändert: 2019/12/31 17:25 von 127.0.0.1