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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: B+ hesitation circuit posted by jenya on December 12, 2000 at 22:31:11:
> ...there is nothing more harming for tube than applying high voltage before heater warms up properly.
That's wrong. A concrete floor can be much more harming.When you build an OTL headphone amp you have to deal with a related problem: turn on output voltage peak that can damage your phones. A relay based delay curcuit can only delay the starup peak. A "soft" solution with tube rectifier or with a long time constant RC filter can solve both problems at once. The latter can supress a turn off peak as well however the plate voltage can be still high when the tube cools down.
Bye,
Lesha
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- Re: B+ hesitation circuit - Lesha 10:39:22 12/13/00 (0)
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