Frequency doubling: Is bandpass filtering needed?

April 30th 09, 12:21 PM posted to rec.radio.amateur.homebrew

Scott[_4_] Scott[_4_] is offline

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Frequency doubling: Is bandpass filtering needed?

Joerg wrote:

BTW, in the olden days we preferred 3x, 5x per stage. Two 3x stages
would give you 9x. The most brazen ones (not me) did a direct 7x or even
9x. We just drove transistors in class C real hard.

Or today, many of us just overdrive an untuned MMIC amplifier and filter
out the unwanted harmonics...

Scott
N0EDV

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