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Several 700's on ebay right now. I may try for one of them if the price doesn't go over $500 (for a non-working amp - sheesh). Mark

Lee, I was wondering what grease you guys use on the bus bars and the cable lugs (aluminum wire?), is it "De-Ox-It" or "NO-OX-ID A Special" or some such stuff? I understand it does a mild corrosive cleaning and then prevents air from getting to the connection through a grease barrier. Could it...

I was reviewing articles for power conditioners that use RF filters and isolation transformers the other day when this tidbit jumped out at me. It seems that by using a 1:1 isolation transformer with a center tap on the secondary, you end up with 60V-0-60V. If you ground the CT, the 120V is...

Has anyone here ever heard about this regarding the PL 400 amplifiers (serial #1042-136): <Quote on> "Q: Hi I've got a question maybe you know the answer. On the back of these 400 's had 1500 watts max in while on the other models they had 750 max in. I wonder what made these units different...

Would Joe's main board work in this amplifier? http://www.ebay.com/itm/Vintage-Carver- ... 1c2802f900 Mark

Link to the old (archived) PhaseTek web page provided by the son (not Justin, the other one) of Ed Blackwood: http://web.archive.org/web/200810111725 ... m/PhaseTek He is selling a nice D-500 amp on ebay here: http://www.ebay.com/itm/PHASE-LINEAR-DU ... 19d1aa4429

Does anyone feel like recommending a replacement OPAMP for the venerable Texas Instruments TL072P? I'm thinking OP 275 or OPA 2604, maybe a LM6172. Thoughts?

Good time to bring this up, I hope Joe will chime in because this is in the theoretical realm. With a PL 400 on the bench, I use my 8 Ohm 300 Watt resistors as dummy loads to measure the loaded output voltage of the amplifier. But if the amp has one of the DC protect boards installed, it will...

Here is the White Oak Audio Capacitor Upgrade for the PL 400 amplifier instruction sheet.

I am going to post the White Oak Audio LED Board Instructions here. First up is the PL 400 Board.

This thread will document another Phase Linear 400 upgrade. Because we are accumulating the knowledge on this site we may not have to document every build from now on but while I am not too busy it is nice to have a record and let the rest of the community chime in. Here is the amp as I opened...

Hello Everyone, My name is Mark and I am hopelessly addicted to professional sound reinforcement (loud music reproduction). I am mostly old-school with a fascination with tube amps but not afraid of the little cans and plastic things with wires sticking out. My other audio pastime is a failed...