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Re: [Amps] Grid Dipping the Pi network in a new amp?

Subject: Re: [Amps] Grid Dipping the Pi network in a new amp?
From: Peter Chadwick <>
Date: Mon, 16 Jul 2007 11:46:57 +0200 (CEST)
List-post: <>
Tom said:
>If you want to do a resistor test, then you connect a 
resistor from anode to ground and look into the pi net 
output with an antenna analyzer. This is the ONLY test that 
tests the tank components for matching.<
If there's enough volts appear across the tube to allow  the use of VTVM with 
RF probe to measure it when you do this test, then you also get the advantage 
of being able to make sure that you haven't got a nasty RF choke resonance 
before applying power. This is a very delicate test, and well worthwhile.

Chuck, you might find it worthwhile disconnecting the coupling capacitor from 
the tubes, just in case there's a funny somewhere there.....

Peter G3RZP
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