Big Transmitters and Tubes

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Big Transmitters and Tubes

Postby Alastair Reynolds » Fri Sep 13, 2013 8:44 am

A visit to WLW in Cinncinati At one time the biggest commercial AM station in the US. In 1932 they built a 500 Kilowatt(that's 1/2 a megawatt) AM transmitter. It took more than a dozen people simultaneously to operate it.
There's some big tubes in here.

http://www.youtube.com/watch?feature=player_embedded&v=CbHjcwIoTiY
A nice bit about the Audio Transformer about 27 mins in.
15 Tonne, 180 Kilowatt RMS audio from 50Hz to 10Khz.
and there were 2 of them. That's one mother of an Audio amp.
Alastair Reynolds
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Re: Big Transmitters and Tubes

Postby rob » Sun Sep 15, 2013 11:19 pm

Hmmmm. Three phase filaments!
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Re: Big Transmitters and Tubes

Postby Alastair Reynolds » Mon Sep 16, 2013 11:34 am

I like the pics of the Generator sets for the filaments. 3 x 33V DC, 1500 amp generators just to run the filaments, these were driven by AC Motors as trying to rectify 4500 amps would have been pretty tricky back then
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