[Amps]  200-ohm tank and "un-un" in HF amp design?

peter chadwick g8on at fsmail.net
Mon Oct 21 04:32:27 EDT 2013


>The touted higher harmonic suppression of a PI-L is mainly a myth.....a plane jane PI  is more than ample for harmonic suppression.<

As a Class AB stage has a second harmonic component of plate current only 6dB down on the fundamental, what sort of Q do you run in the pi network to get the extra 37dB of suppression needed to meet the FCC regulations or the extra 44dB needed elsewhere?

73

Peter G3RZP




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