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I had to grin a little when I saw your post. It amazes me how many times I see someone selling a 4000 on ebay stating that it works perfectly. When if in fact they tried to use the "test procedures" in the service manual they would run into what you did. Either they would choose to ignore it or...

What you need is the later 6/81 version of the Phase Linear 4000 series 1 service manual. Not the earlier 6/76 version. Ed

The Dual 500/D-500's indeed used .39 ohm 2 watt resistors. They were TRW BWH series now replaced by SPH series. The text below is copied from an earlier post of mine...... Here is a link with some history on TRW BWH series resistors and its replacement SPH series after IRC bought out TRW/TT...

Here are some scans taken from the 6/81 revision of the Phase Linear 400 and 2/81 revision of the 700/700B service manuals: "connect four .01/1000V ceramic or mylar capacitors across each terminal of the bridge rectifier..." The purpose of these capacitors was to eliminate Radio Frequency...

After all the issues I noted in my previous post are dealt with on the 3000's they are a decent pre-amp. If my memory serves me correct, this was Dennis Bohn's first product after coming over to Phase Linear from National Semiconductor. I did give him a little ribbing about it when I met him...

The original relays in the Phase Linear 3000 II had a clear see-through top. Phase Linear had numerous problems with these. Earlier 3000's had 13 relays. Later 3000's added an additional (14th) relay in order to prevent problems when using 3-head tape decks. During the production of the 3000's...

I just received a reply this morning to a message I sent to Mr. Stravitz 2 years ago. Mr. Stravitz is a friend of Ed Hart's. He stated that Mr. Hart is currently in hospice care. Ed would be approximately 88 or 89 years old now. I only wish I had been contacted sooner so that I could have...

For future reference..... OnSemi "Product Change Notifications" including "Product Discontinuation Notifications" can be checked here: https://onsemi.secure.force.com/PCN/ Also you may find this article interesting: "Managing Semiconductor End Of Life" by George Karalias (Rochester Electronics)...

Peter, The cam operated power switch was originally designed for a 700B. I am not sure that it will work for a original 700 because of the clearance. I am also vacationing at the moment. So I don’t have the ability to double-check this. Ed

Here is a copy of the Carver C-1 service manual; 6.15 "Noise Tests" along with 6.1 "Pre-Sets".

I wonder if either Dave or James Sauter is the one selling this or know of who is? They both live near Fort Meyer's and built line source speakers for Bob Carver. Maybe Kingman knows? Ed

If in the long run you need some drivers...... I might suggest you getting some RCA66546's instead of RCA410's from some forum member who has some spares. It has been my experience that the RCA66546's are a little better than the RCA410's. Ed

Fred, Only half my amps are series 1's. Does that make a difference? LOL! Ed

Joe, It looks like you may need to update your ebay ad copy concerning ESR (?) and "parallel stack". Ed

I would agree with Joe. Most failures of Phase Linear amplifiers include blown output transistors. Ed

NOTE: I just edited my previous post #49 and added some quotes from Ben Duncan's and Bob Cordell's books concerning Zobel Networks. Along with a comment on Phase Linear 700 series 1 amps that had the Zobel network on a pc board screwed to the bottom of the Honeywell meters. Ed

I already have a good supply of the Dale 50 ohm 5 watt resistors. I had a good stash of them from many years ago obtained from Clyde Yamamoto, Dan Kiefer and Dean Nissen. Add to that the ones I got from Perry that were removed from his amps. The voltage rating on the .22uF mylar's Phase used...

224K is indeed .22uF Ed

The handles on Phase Linear series 2 products came from an entirely different vendor which was located in either New York or New Jersey. The manufacturer made them in a variety of different finishes. I'm not sure exactly which finish Phase Linear opted for. This company was bought out by another...

Here is a link with some history on TRW BWH series resistors and its replacement SPH series after IRC bought out TRW/TT Electronics: https://www.tedss.com/LearnMore/Failsafe-Moulded-Wirewound-Resistors#cross-reference Ed