JCM 2000 how much labor?

[Randall]

The mod and repair went well. I highly recommend the 3/16" hollow tile bit. I used a drill press and it was quick and clean. I desoldered pin 5, and the bit found it's way around the bare pin without trouble. Set of matched quads, new filter caps,and it's looking good, except a sealed Volume and a Treble pot that wouldn't respond to my attempts to get some DeOxit in there. Past that point I suppose, and I don't expect this customer to want to replace them on this go 'round.

I also didn't like where the factory instructions of 90mV put the tubes, around 50mA. I dialed them back to 70mV and they were sitting around 35 - 38mA, which I like a lot better.

[Leo_Gnardo]

The mod and repair went well. I highly recommend the 3/16" hollow tile bit.

You da' MAN Randall!

The 2000 that arrived at my shop this week, I'd already done the drift operation, still going fine with the tubes I'd put in it 3 years ago. Just a little bias tweak & that part was set. Trouble with this one was rectifier for filament DC supply was losing contact with its solder pads after 10 minutes warmup. Dig dig dig out the circus board, clean rectifier pins & resolder, reassemble & all's good. Such fun these 2000's... Yeh those Korg pots are another bugaboo. JCM2000s sound a treat when working, it's just about worth the hassle troubleshooting them.

[Randall]

I didn't realize those were Korg pots, but now that you mention it, they are four legged and look a lot like a couple of pots I replaced in a couple of keyboards last year from the original keys player from Rare Earth. CE Dist has them at $4 ea.

[TimmyP1955]

Check C46 - it likes to blow in a conductive manner, pulling one of the output tubes down.