Just noticed the extra zero, Ok 10KW output, will need 1Kw drive in common grid mode, or 500 Watts if grid driven!
Not to mention you will need a 20kW transformer assuming 50% efficiency!
That is 28A at 240V per phase, double. The current at 110Vs!
Interesting project, your ham licence allows you 1.5KW, well you will have headroom for digital modes!
What am I missing, is this for SW broadcast? Maybe FM?
SSB you could get 12KW PEP, still less than Italian stations 😎😎!!!
KR
Andrew
KR
Andrew
On January 2, 2026, at 14:25, David Mitchell via groups.io <wb2pjh=gmail.com@groups.io> wrote:
I'm trying to finish the repairs on my Alpha 8410 and would like to know if there is a company that has the proper fixture to test the two Penta 4CX10000a tubes? I checked for obvious shorts between the grids, cathode and plates and they all look OK. There aren't many repair facilities around that service amps that use these tubes.73,Dave WB2PJH
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