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Since I now have Joe's new driver board in my 400, I don't really need the "vintage" original one. I really hate to toss it. Do I save it for posterity? I can't ever see the need to go back to it.

I'd like to change the outputs on my amp to the MJ21196G's, since they are currently all original. The amp is still the factory quasi-complimentary design. I've read conflicting stories. Some say to keep the original drivers, and some say to replace everything with the MJ21196G's. Do they have...

One of my bias transistors (the ones in the metal loop mounted to the chassis) came out of the metal loop. These: I put some thermal compound on it and slid it back in. Since I'm going to be changing the driver board to the White Oak board soon, I think I'd like to change both of them out. What...

Hi all. Happy New Year. First post here, but long time lurker. I have an early 4 fin 400 that I’m replacing the meter lamp board with a new White Oak LED board. The existing factory board meter lead solder pads are etched with a “+” on the PCB, but the lead goes to the meter on the non-positive...