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I've had good luck with industrial surplus companies and fleabay.
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I've rebuilt a couple 60's and 120's and my experience has been replacing all electrolytics helps.
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As of about a month ago they still had the boards available. They come partially stuffed missing the outputs and the bias transistor. Their stock of outputs...
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Hi cheez,
I ended up purchasing the schematics, but it's been worth every penny. It turned out to be three bad opamps and a bad 4015 at the DA convertor-...
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I've purchased a 12 x 12 sheet of silpad before. Might have been digikey, but it's been a couple years.
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Wow, thanks very much!
You probably found those in minutes while I have been searching for weeks. Perhaps my Google skills need honing. ...
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Hey Mark,
This was a special case with this model. I've worked on them before and found them fairly straight forward as far as your typical class...
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I agree, but the customer wants what he wants. I've been around and around with this guy. When the amp fails again, and assuming it will be within the warranty...
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So, the response is pretty much what I expected. It's unusually difficult in this age to find ANY technical docs on this unit.
Well, if anyone happens...
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Hello all, just wanted to follow up with what hopefully is the conclusion to this repair.
I have grown to loath this amp and have made a deal with...
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Deltalab DL-4
Anyone have experience with these? No luck finding any service info for it. Only getting dry signal out of it.
Thanks!
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I know what you mean about switchers. Prior to this amp I just repaired a stack of QSC PLX amps. It's a different ball game rebuilding those supplies. ...
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Yeah I hear what you're saying on this one. As long as the owner keeps agreeing to another hour of work I'm making it a mission.
I think I've...
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More good news. I found a pair of 47k resistors which supply Vd to the MJE345/350 blown open. I have a feeling they were part of the original fault and...
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Ok, well it didn't take long to find. The gate resistors on the negative side of the channel that was running away are open. Explains why it was taking...
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Hey guys! Thanks for the responses.
This was brought to me because I have worked on a few and I have all available resources as far as service...
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Ampeg SVT-4 Pro
Hello all,
This is my first post on this forum. I have been a long time member at Diyaudio and was referred by a member.
I have an...
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