en:se-411
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+ | ====== SE-411 ====== | ||
+ | **VHF radio station SE-411**; manufactured by [[Autophon|Autophon AG, Solothurn]]. | ||
+ | In addition to the [[SE-400|SCR-608]] radio sets acquired from U.S. Army surplus, there was an additional need for vehicle stations. After they had developed a prototype set in 1953, [[Autophon]] got the order to develop a powerful VHF radio station. In 1957, their new sets [[SE-407]] und SE-411 were introduced, 262 sets of the shortwave station were produced. Only in the seventies, this powerful but heavy and large set was replaced by the American AN/VRC12, in Switzerland called the [[SE-412]] . | ||
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+ | The station has twelve mechanical preset frequencies in its frequency range 24.1 - 35 MHz and has a modular design. The system consists of a transceiver, | ||
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+ | {{: | ||
+ | |||
+ | ===== Specifications ===== | ||
+ | * [[Principle]]: | ||
+ | * [[Transceiver]]: | ||
+ | * Auxiliary [[Receiver]]: | ||
+ | * [[Double conversion]], | ||
+ | * [[Modes]]: [[F3 | FM (F3)]] | ||
+ | * [[Frequency Range]]: 24.1 - 35 MHz | ||
+ | * [[Sensitivity]]: | ||
+ | * [[Output power]]: [[F3]] 20W | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | * [[Accumulator / Batteries]]: | ||
+ | * [[Generator]]: | ||
+ | * [[Mains]]: with the additional mains power supply **NG 83** from 220 V mains. | ||
+ | |||
+ | ==== Dimensions ==== | ||
+ | * Transceiver TR 96: 302 x 260 x 340 mm, 23.2 kg | ||
+ | * Additional receiver ZE 96: 212 x 260 x 340 mm, 21.1 kg | ||
+ | * Power Supply SG 83: 212 x 260 x 340 mm, 21.2 kg | ||
+ | * Mounting frame MRG 83: 778 x 500 x 395 mm, 19.5 kg | ||
+ | * Mounting frame (Mowag) MR 83 K3: 745 x 155 x 390 mm, 33 kg with cable set | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | * The standard antenna is the vehicle 's whip antenna. | ||
+ | * As an alternative, | ||
+ | |||
+ | ===== Operation ===== | ||
+ | The **SE-407**, developed for for the needs of the artillery and the airforce / anti-aircraft units, covers the frequency range from 24.1 - 35 MHz with 110 channels, it consists of the [[transceiver]] **TR 96**, auxiliary [[receiver]] **ZE 96** and the [[Power Supply]] **SG 83**. | ||
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+ | The variant [[SE-407]] with the frequency range of 34 - 50 MHz in 161 channels was designed for use in infantry and the armoured corps. Its components are transceiver TR 83, auxiliary receiver ZE 83 and the same power supply unit SG 83. | ||
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+ | The NF amplifier **NV 83** and the amplifier **BV 83** for the on-board intercom are integrated in the mounting frame **MR 83**. | ||
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+ | {{ : | ||
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+ | The incoming signal amplified in the input stage of the **receiver** and mixed with the local oscillator signal 8 MHz above the operation frequency. The resulting first intermediate frequency of 8 MHz is converted to a second IF of 1.6 MHz and the signal has to pass a limiter and is demodulated. | ||
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+ | The [[power supply]] provides the necessary voltages for the transceiver, | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | A core component of the radio system is the **" | ||
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+ | Different **control units** are used to recall the preprogrammed channels, the audio signal of the main transceiver, | ||
+ | |||
+ | There is a large number of other accessories like an external loudspeaker LS 83, the microtel (a telephone handset with a push-to-talk button typically used by Swiss armed forces) and a noise set with headphones and lip microphone; there are different antenna sets to fit the SE-411. | ||
+ | |||
+ | ===== Technical Principle ===== | ||
+ | {{: | ||
+ | In the transmitting section, the signal of the common oscillator O1 (range 24.1 - 35 MHz) is fed via an amplifier and driver stage to the two push-pull RF output tubes and via an antenna coupling and tuning unit to the transmitter antenna. A small inductance at the oscillator circuit, which is connected to the modulation diode via the microphone slightly affects the oscillator frequency, so frequency modulationis generated. | ||
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+ | The frequency is processed in the AFK section (" | ||
+ | |||
+ | In the " | ||
+ | |||
+ | In the **receiver**, | ||
+ | |||
+ | ==== Tube Layout ==== | ||
+ | As one of the first Swiss Army radio stations, the SE-411 instructions no longer contain any information about replacement of tubes, these duties are entirely left to the signal mechanic, so the signalmen operating the set do not have to take care of this. | ||
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+ | |||
+ | ==== Development ==== | ||
+ | Beginning in 1953, [[Autophon]] developed the unit as a Swiss alternative to the American surplus [[SE-400|SCR-608]], | ||
+ | |||
+ | ==== Field Use ==== | ||
+ | In 1957/60, a number of 262 units of the the [[Autophon]] SE-96 were acquired and introduced as SE-411 in the infantry and the mechanized troops. | ||
+ | |||
+ | The standard operation distance was 15 km in hilly terrain, 30 km in open terrain and in case of direct line of sight (on VHF frequencies, | ||
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+ | In addition to the use in armored vehicles, the station was also used in signal trucks (VW bus or Mowag). In order to be used as a relay staion, these vehicles were also equipped with a radio from the [[SE-206|SE-206/ | ||
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+ | {{: | ||
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+ | {{gallery>: | ||
+ | |||
+ | ===== Technical Manuals ===== | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | |||
+ | ==== Additional Information ==== | ||
+ | * [[http:// | ||
+ | * [[https:// | ||
+ | * [[https:// |
en/se-411.txt · Zuletzt geändert: 2019/11/22 21:15 von 127.0.0.1