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RE: I never said it was nefarious

68.41.247.154

In Reply to: RE: I never said it was nefarious posted by kentaja on December 18, 2024 at 09:01:59

I serviced the ARC equipment and couldn't see the numbers behind the color stripes. Either way the effect is the same.
Since you're so deep into subject please provide the types of fets used in Q1, Q2 ,Q3 Q4 positions on posted VT100 so I can exercise my right to repair the equipment I bought and paid for. I will be my own judge if the replacement I use are matched to the needed degree. Also since you're here give me the types of the pass transistors in the regulator circuit which are not subject of matching . I know they are selected because the circuits are marginal and require it in some but not all devices. I used Audio Research as an example of manufacturer who does protect some of the design aspects just like Tom Evans does and not to single it out like you suggest. Please do not tell nonsense of 90% refusal rate on modern production silicon devices from a reputable manufacturer on technical forum.

Edits: 12/18/24

Follow Ups:

And example - Wojciech 10:08:38 12/18/24 (0)
"A friend of mine was swapping tubes in his Audio Research Reference One preamp when he bent and broke one of the leads on an FET that has a heatsink very close to a tube so I contacted Kalvin at Audio Research for a replacement "Green White Brown" FET.
What I received was a Green Green Brown FET in a mailer envelope. They charged $15 for the FET and another $15 to send it in the mailer envelope!
Not to mention the whole parts process took 2 weeks from start to finish and I don't even have the correct "hand painted" part yet.
Needless to say, Audio Research will not be getting any more of our hard earned money for their "hand painted" parts. Or any more components for that matter."

With all due respect for ARC, the paint they use to "code" their components is of such quality that even lacquer thinner will barely break it down. But once it does finally clean away from the semiconductor the reveal is a heavily sanded component that is guaranteed to not expose its identity. The process of disguise must require meticulous sanding and an expert level of artistic painting. A level of personal attention unheard of in other companies products. I've never seen hand sanded and painted components in any Krell or Levinson piece. Slackers.

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