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[AMPS] Capacitors & Resonance

To: <amps@contesting.com>
Subject: [AMPS] Capacitors & Resonance
From: mike@g0mjw.freeserve.co.uk (G0MJW)
Date: Thu, 4 Nov 1999 16:27:00 -0000
>
> A capacitor that is resonant at 50MHz looks like an inductance at 150MHz.
>  A better bypass for 150MHz might be 200 pF.

It would seem logical Rich. But what happens is that the anode then becomes
unloaded at low frequencies, where the gain is often higher. The amplifier
takes off at low VHF or worse sets up a resonance with the RF choke.


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