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I finished my WOPL conversion a few months ago and its been working just fine except I still had the NTE- 129A transistors in the bias sense. I could only get the bias down to about 400 mv and everyone on here said...."No! You need 2N5088's in those spots so it'll adjust correctly." So today I...

A friend got this PL400 off Ebay and brought it over today. Seller told him it has been sitting in a storage locker for many years... Sure looks like it to me. Transformer is good and so are the meters but it's gonna be a complete tear down and a new White Oak driver board and all new outputs...

I've built quite a few different amplifiers over the years and was curious if any of you on here also have. A few that I've done are the Krell KSA-50 MK2 and the KSA-100 MK2 and a number of pass labs Aleph circuits including the Aleph 30 and A pair of Aleph 2 mono blocks. Till I acquired the...

I need one top cover to complete my amp which is an early Series 1 Model 700. It's an easy part to duplicate, but it would be nice to have an original. If you have one you'd sell please let me know... Thanks! Mark Allen ksa50amp at yahoo.com

Well, the parts arrived today, but just barely intact. Box was crunched and split open along one long side. It all appears to be there though, so it's a testament to Joe's packing that it all stayed in the box. I'm doing the conversion first leaving the O/P stage Quasi Complimentary. Will do...

Hi all, I used to repair Phase Linear products in the Chicago area from about 1972 to 1975. Early on when I called PL to order parts sometimes Bob Carver would actually answer the phone. Repaired mostly PL-400 models but also quite a few 700's and 700B's. I left Hi-Fi repair for a position at...