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Originally Posted by G8DLH
Since you're feeding in 1 Mc/s fixed freq., you might be better off replacing the anode load R with a L/C parallel tuned circuit - and run the amp. in class C.
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Class C with 1V p-p available as drive for the EF80? Not a chance.
The back of my envelope claims you will need something on the order of at least 10-15 times that to be able to reach class C through grid rectification with 170V on G2. Even more than that for higher powers.
Best regards
Frank N.