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Old 22nd May 2003, 06:34 PM   #21
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Hi Alex,

Quote:
As to the reason why, I guess I am just not too comfortable to using a tube with one section not being used while the heater is running.
Just ground the section you don't use: grid, anode and cathode.

Cheers,
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Old 22nd May 2003, 06:45 PM   #22
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Quote:
Originally posted by fdegrove
Hi Alex,
Just ground the section you don't use: grid, anode and cathode.

Cheers,
Thanks Frank, I should have stated that, but consider it implicit in my response. If you're <i>really</i> worried about cathode poisoning, and I dont think it's an issue if you swap the tubes, say monthly, then run a high value resistor to the anode to keep a trickle moving through it. maybe 1/20 the active section. Opinions people?

As for elegant, that's certainly up to individual opinion, but I fail to see what's <i>in</i>elegant about this arrangement; you even get your tube pins cleaned regularly.

John,
Sorry if I came across as abit blunt before. Madly typing assignments at 2am.

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