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In Reply to: GE 6CA7 - Can't bias tube low enough posted by Capt. Z on April 12, 2007 at 04:56:47:
Just checked the LED after one hour or so after warm up and the LED light has gone off.
Follow Ups:
Checked the LED again a few times and I has been on again the last few hours. Switching the tubes to a different position only means, that the bias 'problem' follows the tube.
I would scrap it...you don't want to mess with marginal power tubes.
Not meant as a personal question -- really! If the tube is a little gassy, after it warms up thoroughly, it may be adsorbing enough gas to bias correctly. You should be able to use a tube tester to find out. If the tube is gassy, it's finished as far as I know.
Tube tester shows NO short or Gas
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