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Yeah, now it's time to order parts. And I have a drawer full of plastic washers. So I'm sure I can resecure the boards without any risk of shorting. The back of the boards are trimmed very close, less than 1/16", probably closer to 1/32" on the highest solder joints. Also, does that parts list...

Oh yeah! I got one dun blowed up.

So my notes say I need: 10 ohm, MF, 2W 1%; 150 ohm, MF, 1W, 1%, and 0.33 ohm, MO, 3W, 2%. Is that correct?

If you mean the pico fuses, they are all good. I double checked them. I checked every resistor.

Well, it seems that there are a number of resistors on the backplane that are blown, as shown in the photographs. The layout of the board I have with my documents is different than the boards in front of me. So I’m not sure I have the numbers correct, as some can’t be seen, but I put arrows in...

Okay, going out now to try this again. Gonna reattach the red collector lead, check all the emitter resistors, and reassemble with all the proper hardware. Then I'll power back up and check everything Joe recommended. If all's well, I'll change out that resistor and see if I can't get it right...

Yeah, you and I are of the same sensibility on the lubricant. As an old race car guy, I never put fasteners together without lube. On a race car, everything is secured, unsecured, and resecured so many times that chatter is always a problem, especially on aluminum, particularly for getting...

Also, that is not the backplane board I have. I know that doesn't negate what you observed about the ground hardware, but I know nothing like that came my way. I certainly have such hardware here, but it didn't come from WOPL.

As far as I can recall, and I'm pretty confident about this, my kit did not come with such washers. There were small nylon washers, but nothing like what you are showing. And, as far as the transistors are concerned, I know they're crocked. They turned that way when I tightened them down. I...

I just re-checked the transistor. It's okay.

It's possible that bias wire shorted to something. Obviously, when I opened it up, the wire moved. So I have no idea what it might have come in contact with.

Another arrow.

Okay, additional information. I just saw that the red wire to the Bias-C connection is not connected. It must have broken off when I was replacing the pico fuses.

I don't see anything wrong on the backplane. Do you?

Okay. I'll go out now and do some sleuthing. Thanks.

My on again, off again project has hit yet another snag. I replaced the TL 431s on the board, plus all four of the pico fuses before, once again, attempting to breathe life into my WOPL 400. All went well, until it didn't. I went through the Variac and DBT process with no apparent problems. The...

I had to put my 3300 project away for a few months, but got back to it last week. I dropped R1 and R3 back in and fired things up. The unit now seems to be working beautifully. However, when other equipment is plugged into that power line, whenever I turn things off, I get a loud pop through the...

I'm still unclear as to R 1 & 3. What wiring is in need of fixing?

And these.

One more time.