soft start in a audionote 300b

howardnair · 1767

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Offline howardnair

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on: December 31, 2013, 12:39:33 AM
thats the question-having arcing problems in the rectifier on startup-this was fixed for 6 mos or so
now it is occurring again-now granted the caps may or maynot  be failing---several remedies have been tried --the amp works and sounds fine but the arcing is not normal and unnerving -what is happening in the rest of the circuits as far as damage to tubes etc-i have not cked start-up voltage yet -it is most likely high but not alarmingly so just enough to give the 5u4g a hard time
schematic is here

http://www.4tubes.com/SCHEMATICS/BY-BRAND/Audio-Note/Kit1/

thanks howie



Offline Doc B.

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Reply #1 on: December 31, 2013, 08:29:39 AM
It's bad caps or bad tubes. Probably best to ask on the ANkits forum at Audio Asylum.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.