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+ | ====== SE-211: TLA (Tragbar Leicht Artillerie, " | ||
+ | **Tragbar leichte Funkstation der Artillerie** (TLA), **SE-211**; developed by [[Telefunken|Telefunken Zürich]]. | ||
+ | In 1935, a in those days very modern Telefunken station was evaluated as a replacement of the obsolete radio material from the twenties. A case containing the transceiver, | ||
+ | |||
+ | {{: | ||
+ | |||
+ | ===== Technical Data ===== | ||
+ | * [[Principle]]: | ||
+ | * [[Modes]]: [[A1]], [[A3|AM (A3)]] | ||
+ | * [[Frequency range]]: 2 - 3.333 MHz, analog dial, ca. 5 kHz accuracy | ||
+ | * [[Sensitivity]]: | ||
+ | * [[Output power]]: [[A1|A1 (CW)]] 15 W, [[A2]]/ | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | * [[Accumulator / Batteries]]: | ||
+ | * [[Generator]]: | ||
+ | * [[Mains]]: with mains power supply [[NG-TL]], selector for 120, 145, 220, 250 V AC. | ||
+ | |||
+ | When the TLA was introduced, the mains power supply [[NG-TL]] (120, 145, 220, 250 V) from [[Zellweger, | ||
+ | |||
+ | ==== Dimensions ==== | ||
+ | {{ : | ||
+ | * Apparatus Case (Transmitter): | ||
+ | * Battery Case (Accumulator, | ||
+ | * Treadmill generator: 300 x 300 x 860 mm, kg | ||
+ | * Supplementary Case (antenna material, matching unit) | ||
+ | * Mains power supply ([[NG-TL]]): | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | * **Standard antenna** was a 16 m L-antenna erected between two poles and a counterpoise. | ||
+ | * **Long distance antenna**: an alternative to the standard antenna was the long distance antenna with a length of 27 m. | ||
+ | |||
+ | ---- | ||
+ | {{: | ||
+ | |||
+ | ===== Operation ===== | ||
+ | The " | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | By loosening the four red-marked screws, the chassis can be pulled out of the box; on the back the chassis, the tubes are now accessible, also the slider controls for the adjustment of the valve heaters voltage of the transmitter and receiver heating circuit (4 V), which need to be adjusted after each change of valves or hydrogen sulfide stabilizers. | ||
+ | |||
+ | First, all station components must be connected with the cables: the pedal generator is connected with the " | ||
+ | |||
+ | When the switch on the battery case is in the " | ||
+ | |||
+ | All accessories and the machine and apparatus cables as well as spare tubes are stored in the battery box. | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | With the very characteristic tuning lever, the frequency can directly be read from the dial window (in contrast to earlier sets, Telefunken not only provided a 0-100 dial, but for the first time a calibrated frequency dial). | ||
+ | |||
+ | After connecting the antenna and ground / counterpoise, | ||
+ | |||
+ | In the " | ||
+ | |||
+ | ===== Technical principle ===== | ||
+ | {{: | ||
+ | |||
+ | From the microphone, the AF signal is amplified (V4, [[de: | ||
+ | |||
+ | {{: | ||
+ | |||
+ | The **power supply** is very sophisticated. In reception mode, the receiver is supplied by the 6 Volt NiFe heaters accumulator and three plate batteries of 60 V each in the " | ||
+ | As soon as the pedal generator is activated, a relay circuit in the battery case switches to generator power. The heaters accumulator acts in buffer mode and continues to heat the receiver valves. The receiver gets its plate voltage directly from the pedal generator, the transmitter circuit gets the heating and plate voltages from the generator. In mode switch position " | ||
+ | The voltages from the pedal generator, heaters voltage 8.5 V and plate voltage of 330 V and the negative grid voltage are reduced by FeH stabilisers to the operating voltages of the transceiver. The treadmill has to be turned with 58 - 62 tours, the instrument on the treadmill generator displays the correct turning speed. | ||
+ | |||
+ | ==== Valve Lyaout ==== | ||
+ | {{ : | ||
+ | **Receiver**: | ||
+ | |||
+ | ==== Development ==== | ||
+ | In the year 1935, the wireless station Telefunken Stat 272 Bs has been evaluated by the Swiss Army as a possible successor of the very outdated Swiss Army wireless equipment dating from the twenties.\\ | ||
+ | {{ : | ||
+ | A similar set with a combined transceiver in one " | ||
+ | |||
+ | {{ : | ||
+ | At the time of the introduction in 1942, the mains power supply [[NG-TL]] was already available. | ||
+ | |||
+ | As early as 1947, the artillery stations were replaced in the field artillery by the wireless set [[REX]]. In 1951, the TLA station got the new designation SE-211, the TLA was liquidated in 1961. | ||
+ | |||
+ | ==== Field Use ==== | ||
+ | The station | ||
+ | |||
+ | A little later, the TLA was replaced by the radio set [[REX]] in the field artillery units, the TLA thus had only a very short service time. | ||
+ | |||
+ | {{gallery>: | ||
+ | |||
+ | ===== Technical Manuals ===== | ||
+ | * {{ : | ||
+ | |||
+ | ==== Additional Information ==== | ||
+ | * [[http:// | ||
+ | * [[https:// | ||
+ | * [[https:// |
en/se-211.txt · Zuletzt geändert: 2018/12/29 13:59 von 127.0.0.1