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Thanks to the excellent wiring diagrams here and in the WOPL instructions, I wired this formerly PL36 PL400S2 to the new WOPL PL 14-20G. I want top make sure everyone concurs this is the proper order of wiring. Thanks for double checking my work.

I think I'll keep the TL 074's that are in it. I can follow directions and desolder/solder anything, and even trouble shoot a couple circuits, but No way does any of those articles make sense to me. That's electronics 300 or greater.. :)

Thanks Nav!

Yes.

Still interested in articles or threads discussing changes to this Preamp. Haven't found anything. Perhaps Ed has some info. I'll give him a call.

Ya Hey Professor! It seems to working fine, I am not aware of op amp issues. Do you have an article you could refer me to, regarding changing them out? I'd like more information regarding changing the opamps. Good to see you!

If you think it's a good idea, it probably is. I have no idea how to do that. I'm still in Electronics 200. :) I couldn't believe I was able to buy all new nitrogen filled yellow relays from Walmart of all places, and they were only about $3.50 each. I also replaced the somewhat scorched snubber...

Here are the caps needed for the recap of a Phase Linear 3000 preamp

I just finished a first listen to the above referenced set up. OMG, I've never heard such detail and clear power. Recapping the 3000 was totally worth it, and lets the WOPL soar. Thanks to all you guys for your tech support.

Nice!! I picked up a couple "non-working" Furman PS-8's a few weeks back. I have the first one up and running, it needed a single 1000uf 50V capacitor. The second one has a dead EFI filter, I'm waiting for the part to arrive. Pretty easy to work on. I'll probably off one of them to cover the...

Gotcha. I appreciate the explanation, and something I can be aware of in other electronic endeavors. BTW, your color diagrams of hooking up the board in a former pl36 configuration are very helpful.

ok, but still wonder why it matters? Curious mind here.

Curious why the screw heads should be on bottom. I reversed them so I could get a socket on the nut... ps thanks for checking things out!

Hi kids, I just finished assembly of a WOPL Control Board Version G for use in a Quasi setup. I thought I'd post a picture to see if anyone spots any issues before I go forward with installation. Thanks in advance for your eagle eyes.

Were you able to locate a schematic? I have a couple of the PS-8 I'd like to bring back to life. Thx!

What? I thought I was getting paid to not post!

thx, this was a well running amp before I caused a short.

Thx Laatsch. They all check out after lifting and testing. I also swapped the bias resistors 5088 from side to side with no change in results. The left pot/bias has a range of 0.28 - 0.51. the right pot/bias has a range of 0.13 - 0.32. I tested all the transistors inboard, and nothing stood out...

Do you think it would be ok to swap in a 2n3403 (with the ecb correct) to test if the bias transistor is the issue? Otherwise I can wait for my electronics store to open Monday... thinking about it, the lower beta of the 3403 might not give me any useful info?

D1-D4 all check out. Thanks for the idea.