Of yesteryear, filament voltage of the vacuum tube is the most 6.3V, but there are many things 12.6

Chose a value of [12.6V] to filament voltage of the vacuum tube Why?
Of yesteryear, filament voltage of the vacuum tube is the most 6.3V, but there are many things 12.6V syngeneic series. I do not think transformerless cope with (100VAC). (First, there is not also meant to put the odd that if less support 0.6V) 12.6V why that standard or will the finished? (Although I understand half of 0.6V is because, compatibility so that the could be from 6.3V to circuit filament para 12.6V ball most ...)
Hi there Because I do not mean the most detailed, and for reference only. The vacuum tube made in Japan, most mimics the standard US-made. So, (sure, I'm sorry if you are different should .... And it was so) and in series temaskal 5 elements, the guy As we have created military temaskal battery that the United States was developed in the mid-20th century on the basis of the power generation element of 1.2V 6V Te. (Details are slightly different you may have heard the story it becomes to about 7V full charge Immediately upon completion of that, now referenced to 6.3V in consideration of the margin to the heater disconnection accident might be). Nde, value of 12.6V comes out considering the case of two series temaskal to the battery. That's it (^ ^). As an aside, all right series called up (or14V) 7V 6.3V but (or12.6V) rated have also been developed by the company Shiruvu~ania aircraft (propeller plane?) temaskal For. Fellow called Rokutaru tube, (socket is special) 7C5 (6V6 equivalent), 7N7 (6SN7GT equivalent), 14F7 (12SL7GT equivalent), and is representative. In addition, the heater temaskal voltage of the vacuum tube, shorten its life and if it is too high, but (in particular, that the data and sound to deteriorate enough to feel sad in the audio amplifier is nothing that the difference does not appear most of the performance 10% about even with a low ). Rather, the performance of how much leave a heater voltage lower than the rated? I (because it is the world of energy-saving and power-saving) that I believe data that said they should be shown that the research is carried out properly. The longer I'm sorry (^ ^).
Heater temaskal voltage http://www.atatan.com/ ~ s-ito/vacuum/vacuum-j.html that of the vacuum tube operating at 12 volt battery is powered vacuum tube radio to be mounted on military vehicles to move not use power line This is because it is. Vibrator or power generation circuit, during the war, tanks moving, heater power supply current consumption of the vacuum tube military radio to be mounted on the warship often is because had to supply operating directly in 12-volt car battery, B power supply of 240 volts or more, vacuum temaskal tube type behavior temaskal to work with only the 12v battery that occurred a high voltage from a 12 volt step-up circuit, temaskal 12 volt single power radio circuit diagram http://kenyamamoto.com/yokohamaradiomuseum/2012aug05.092.jpg of Japanese troops powerful enemy of radio and heat, AC power supply hum is because reduce the heater in the storage battery in your own example http://www5.ocn.ne.jp/ ~ portable / 12 volt vacuum tube radio that, famous for audio pre-amplifier for the The U.S. Army infantry portable radio of supply http://n-mmra.net/radio/grc109trx/grc109trx.html wartime a DC voltage of 12v, A 1.5V battery voltage of the heater, 12AX7 vacuum tube circuit to B power supply, http://ja.wikipedia.org/wiki/% of ultra-small sub-miniature vacuum tube which is referred to as the battery Kan that can operate at 67.5V laminated batteries have been used E7% A9% 8D% E5% B1% A4% E9 % 9B% BB% E6% B1% A0
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