-----Original Message-----
From: sm5ki <sm5ki@algonet.se>
To: Steve Thompson <rfamps@ic24.net>; amps@contesting.com
<amps@contesting.com>
To: <amps@contesting.com>
Date: 29 August 2000 07:08
Subject: SV: [AMPS] Testing HV Psu
>
>Hello:
>
>Years ago in one of the British ham magazines there was a circuit where you
>discharged the reservoire cap in the hv with a thyristor that was in
>paralell. When there was flash-over in the pa tube ( valve hi!) you got a
>pulse that fired the thyristor.
In the version I remember, the thyristor was triggered by the anode current
spike, but it grounded the screen grids (so as to protect the socket
capacitors), not the HV supply.
73, Steve
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