A curious observation - diyAudio
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Old 27th April 2006, 09:31 PM   #1
diyAudio Member
 
Join Date: Mar 2006
Location: Michigan
Default A curious observation

Hi, as I posted earlier, my first diy works, however I have a rather curious problem/question.

when my amp is warmed-up, and has been going for a while, When I flick off the main switch, after a second or two, the sound grows far louder, and more full for about a second, then dies down. any ideas as to why this happens?
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Old 28th April 2006, 02:09 AM   #2
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Join Date: May 2005
Location: California
Hi, The negative bias capacitor supply drains out faster than the B+ supply, so for a short time the output tubes are biased "hotter" until the B+ caps lose their charge. This will not harm anything because it lasts for such a short amount of time. In fact, this helps with the draining of the B+ filter caps.
Daniel
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