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Old 6th Jun 2008, 8:57 pm   #3
Steve_P
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Join Date: Sep 2003
Location: Bolton, Greater Manchester, UK.
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Default Re: Another (possibly silly) valve question

If the HT is fully off, then there is no problem. It is used sometimes to keep valves 'warmed up' as Paul says.

Do make sure it's fully off though. HT in the wrong place can do damage. Think of a Pentode when there is nothing on the anode and full HT on the screen grid. The grid tries to be an anode, glows white hot and destroys the valve.

Cheers,

Steve P.
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