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In Reply to: RE: Golden tube issue posted by unclestu on April 18, 2014 at 14:21:34
the one i have here is a bit more than arc . will post some photos later
Follow Ups:
Stu is correct.There are resistor issues and board warp stressing but I was going to have you do the basics first..
Honest amplification is better than excessive 2nd order distortion anytime.
Hi Mike.
look at the one in my bench now. i think the 11 ohm on one of the tube is blow and it made big mess.
Pete
I'm looking at these reworked power supplies, whatever they may be, and different/better/more expensive(?) brd caps to replace the Wima's and in every case unless it's a Sonic Craft mod w/a few Beyschlags & metal oxide resistors (SC doesn't address the bias supply regulation problem either), all the other resistors remain carbon film..!!!! CARBON FILM..!!! LOL!Doesn't this amp deserve Vishay RN65's and Dale RS series resistors (and yes the Beyschlags)?
In addition, I see the 1/2watt 10k resistors in the bias circuit increased to 2watt carbon film.. LOL! What the hell will THAT do???
FYI, besides installing 10k cermets, I changed R56 to 390 ohms and those 1/2w 10k's to 4.7k 1/2 watt metal films. (I sent this to MS in a private email).
I can regulate anything from 6-5881 to 4-KT120's (up to 60mA, but will need to do better, I just don't want to push the junk supply)..!!!
Yes, I will rework that crappy bias supply and of course the p supply as the amp still remains stock with IC electros. (uuuggghhh)...
Although the dynamics & headroom have improved somewhat, w/out having yet reworked the p supply, I'm not impressed...
Edits: 08/19/17 08/19/17 08/19/17 08/19/17
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