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en:ng-tl [2018/12/29 13:35] (aktuell)
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 +====== NG-TL ======
 +**Netzanschlussgerät NGTL** (Mains power supply); produced by [[Zellweger,​ Uster]].
  
 +Die ab 1935 bei der Truppe eingeführte Telefunken - Station [[SE-210|"​Tragbar Leicht"​ (SE-210)]] war zunächst nur mit einem Heizakku, Anodenbatterie und einem Tretgenerator zur Stromversorgung ausgerüstet. Der zum Sendebetrieb notwendige Betrieb des Tretgenerators stiess bei den Funkern auf mässige Begeisterung,​ so dass die Truppe bald improvisierte Netzanschlussgeräte besorgte, was natürlich ein Richtlinienverstoss bedeutete. Aufgrund der zunehmend geäusserten Bedürfnisse der Truppe konstruierte [[Zellweger]] ein Netzanschlussgerät,​ mit dem dass Stationsmaterial 1942 erweitert wurde.
 +
 +The Telefunken "​Portable Light" radio station ([[SE-210]]) which was introduced in 1935 was initially equipped only with a heaters and plate battery and a treadmill generator for power supply. The operation of the pedal generator, which was necessary for transmitting,​ was not that popular among the signalmen. That was the reason, that the signalmen looked for improvised power supply units, which of course meant a violation of the army regulations. Due to the increasing demand of the signal troop, [[Zellweger]] developed a power supply unit, which was added to the station equipment in 1942.
 +
 +{{:​images:​se-210-ng-tl.jpg?​direct&​400|Netzanschlussgerät NG-TL}}
 +
 +===== Technical Data =====
 +  * [[Principle]]:​ [[Power supply]]
 +
 +The mains power supply provides all necessary voltages to operate the radio sets [[SE-210|TL (SE-210)]] and [[SE-212|TL BBC (SE-212)]]: the plate voltage 330 V (160 mA), heaters voltage 8,5 V (3,5 A), grid bias voltage 65 V (0,65 mA).
 +
 +==== Power Supply ====
 +  * [[Mains]]: 120, 145, 220, 250 V; 160 VA
 +
 +==== Dimensions ====
 +  *  mm, 20.2 kg
 +
 +==== Accessories ====
 +A small wooden box contains the power cord, a spare rectifier tube [[de:83]], spare fuses and a lamp socket outlet (the so called "​Edison socket"​). This device can be screwed into a normal lamp socket, if no wall outlet is available, and electrical devices can be plugged in - in Switzerland,​ the use of these devices is prohibited for safety reasons since many years.
 +
 +===== Operation =====
 +The power supply unit is connected to the mains with the main switch in position "​0",​ and connected to mains by pressing the buttons on the circuit breakers. The mains voltage can be checked by the voltmeter.
 +
 +With the generator cable, the mains power supply is connected to the battery case of the [[TL]] station.
 +
 +Now the power supply is switched on with the mains switch, after a delay of around one minute, the plate voltage of 330 V is switched on.
 +
 +Since the heaters accumulator of the [[TL]] is used for buffering, the power supply unit must only be used with the 6 V heaters accumulator connected to the battery case of the [[TL]]. ​
 +
 +===== Technical Principle =====
 +The plate voltage of 330 V is rectified with a mercury rectifier tube. Since this must be pre-heated before applying the voltage, a bimetal switch ensures a delay of one minute until the high voltage is switched on.
 +
 +To rectify the heaters voltage, selenium rectifiers are used in a bridge circuit. Since the voltage can drop due to aging of the rectifier, the voltage drop can be compensated.
 +
 +Also the grid voltage is rectified with a selenium rectifier.
 +
 +Two circuit breakers protect the mains voltage connector, a high-frequency filter in the mains supply prevents high frequency from the transmitter to flow back into the mains power installations. With a voltmeter, the applied mains voltage can be controlled.
 +
 +==== Valve Layout ====
 +Rectifier valve [[de:83]], selenium rectifier 120/0,3 and 12/4,8.
 +
 +==== Development ====
 +The mains power supply NGTL has been developed by [[Zellweger]],​ Uster.
 +
 +==== Fiel use ====
 +From 1942, the mains power supply and the supplementary antenna material has been delivered to the troops.
 +
 +{{gallery>:​images?​se-210-ng-tl*.jpg&​0&​80x80&​crop&​lightbox&​showtitle&​titlesort}}
 +
 +===== Technical Manuals =====
 +
 +==== Additional Information ====
 +  * [[http://​www.armyradio.ch/​radio-d/​se-210-ng-tl.htm|NG-TL auf www.armyradio.ch]]
 +  * [[https://​www.hamfu.ch/​de/​geraete/​geraet.php?​id=87|TL auf der Website der Hamfu]]
 +  * [[http://​www.radiomuseum.org/​r/​zellweger_netzanschlussgeraet_ngtl.html|NG-TL auf der Website von www.radiomuseum.org]]
en/ng-tl.txt · Zuletzt geändert: 2018/12/29 13:35 von mb