• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Transmitter tubes

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Anyone here know the name of some of the largest radio transmitter tubes. I recall someone posting a link to a japanese tube amp using one of the mid sized transmitter tubes, that I believe were in the 2-3 foot tall range it seemed, and I was curious how big they got, and what they were called. A friend asked just how big some of them got, and I had heard that some were 4+ feet long in some of the larger radio stations. At the same time, I know the forced air cooled modern transmitter tubes aren't that large at all, even in the 20-50,000 watt range. Thanks for any help you can offer.
 
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