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Re: [Amps] Heathkit Warrior High Plate Current

Subject: Re: [Amps] Heathkit Warrior High Plate Current
From: Ian White GM3SEK <>
Reply-to: Ian White GM3SEK <>
Date: Wed, 22 Oct 2008 07:38:45 +0100
List-post: <">>
Gary Schafer wrote:
>Check the meter shunt. Hook a known good meter in series with the plate 
>current meter circuit to see if they read the same. Keep your fingers 
>out of the high voltage.

Don't even plug the power cord into the mains! There is a better, much 
safer way to do it.

Working with a completely 'dead' amplifier, you can connect a small 
external power supply to deliver an accurately known current through the 
meter circuits. It isn't necessary to power  up the amplifier, or even 
to disconnect any of the existing wiring.

The exact details  of the test hookups will depend on the individual 
amplifier, but you can see the general idea in Section 6.1 of the Triode 
Board user manual, downloadable from the address below.


73 from Ian GM3SEK
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