[Amps] twin 4CX-10 000D amplifier: multiple tubes

[PA3DUV]

Gentlemen,

For those interested in the design of HF power amplifiers this web page might be of interest:

http://66.249.93.104/translate_c?hl=en&ie=UTF-8&oe=UTF-8&langpair=ja%7Cen&u=http://www.iizuka-net.ne.jp/~bear-el/10000d-2&prev=/language_tools

or without the translator:

http://ns.iizuka-net.ne.jp/~bear-el/10000d-2/

This single band 7 MHz amp for amateur usage is conservatively rated at 20 kW output. Exciter is an Icom IC7800.
According to the builder of the amp is does 20 kW out without abnormal blower noise levels or a burning smell from the RF deck. A 30 kVA 3 phase power supply is used, generating an unloaded B+ of 8 kV DC.

Cheers, Dick
PA3DUV