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Re: QCX 7mhz Output Filter


 

Here is a table of the RMS output voltage/power I'm getting.
I've tried tacking 20pf and 50pf capacitors across C30, but that lowers the output at 7.030mhz
Julian,

I think L4 is the key?
I think Hans has said it's resonance is what makes the PA (almost) work in class E.
And that is is one reason why the QCX is mono-band.

73 Alan G4ZFQ

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