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Reread the last sentence in my statement you quoted. Therein lies the answer to your question.

I hear what you're saying, and my first PL-400 is not purely original anymore. I did put Don's DCP board in it along with the cap upgrades. Still, it gives me a reference to compare my other amps to and I like it.

I have PL-400 I'm keeping as original as possible. It was almost perfect when I got it. I replaced the output transistors and upgraded the PS caps, recapped the control board with Nichicon FG caps and replaced the meter board with the WO LED board. Love these amps. IF the transformer is good...

KABOOM for sure. I'm thinking there were 6, 1000uf caps before a cap disintegrated and the fuse blew. Bet that ruined a pair of underwear!!

This is my next project, "Linda". I'm convinced some people should not be allowed to touch a soldering iron...

Backplane test fitted. DCP modified and installed. Rectifier/snubber assembly installed. I'll start populating the control board next. Leaving the wire hookup and routing till last. Ordering some sticky bases to secure the harness. 

...progress...

Here's a couple to start.

Iso alcohol took the stickiness out of the adhesive and cleaned off the nicotine on the face of the foil, but that was all. Goo Gone gets round 2. Started the build, I'll take some pics this weekend.

Back when I started this project, I disassembled the transformer. The back cover plate was rusted and peeling paint so I peeled the data foil off the back. I've cleaned up the cover and spray painted it. Now I'm wondering if it's possible to get a new reprinted data foil or just put the old one...

Copy that. Solves the problem of finding a high current switch in a small package.

Honestly don't recall. Wanted to go back to it and can't find it now. Don was involved in it quite a bit.

CALLING DON!!!! Found a thread on that site which shall remain nameless about using a triac for power switching. Then I get back to this thread and find that Don has developed a triac board for the 700. So Don, have you got one (or three) that can go in a 400? Seems that would make installing a...

My first name is Harold, but you can call me Harold...and sometimes smartass.:p:p

...and the adventure begins... Do I have the PEM nuts facing correctly?

Just won a "wounded duck" . Said channel A no output, channel B distorted output, and some mods that will need to be put right....this hobby is a bit addictive...:oops:

HAWT DAWG!!! My WOPL kit has arrived!! With spring here and summer comin on, I don't know when I'm gonna find the time to get started.o_O

Cleaning up the cooling fins, the middle fins popped off. Looked to be epoxied together with bare metal to metal contact. Can I JB weld it back together or reassemble with thermal paste?

I took a different approach to mounting the IEC jack. Moved the rail fuses outboard and brought the AC fuse inboard.

Well, all that's needed is a source for transformers and cooling fins then you could sell complete DIY kits.