Fisherdude,
You may recall that I also recently found one.
I'm glad you no longer have a reason to be jealous of mine.
Also, it's great that the unit of yours has a good looking cabinet and sounds great just as it is. You're very fortunate.
Good luck. These sure are lookers. They have the classic mid-century modern look and glorious Fisher tube sound. Plenty of 7591 muscle too! The hideaway panel is very cool.
http://www.audiokarma.org/forums/showthread.php?t=264093
Actually, I'm now jealous of you.
I've recently let mine run for a day and I'm not as fortunate as you servicewise with my X-101-C, though it cleaned up fabulously. When finished it will be a lifetime keeper. The sound is fine and will only improve. It didn't get particularly hot either.
I'm preparing to put new coupling caps in mine. I've happened into a bunch of Jensen Copper Foil PIOs with silver leads. But I believe I'll wait until I take care of some ills before putting the couplers in.
Here's the list of ills:
1. Power supply transformer hums - an oscillation hum that doesn't go into the speakers - I have a 500-C PSU and I need to compare the numbers, but I suspect I won't get lucky. I had this happen on a 400 and tightening, isolators, or other attempted oscillation dampers just didn't fix it. Replacing the transformer with one from another 400 fixed it.
2. The volume pot is unbalanced at low volumes. I have to play with the balance and volume knobs. After about the 9:00 setting on an analog clock it's fine.
3. When I go to shut it off, the right channel gets loud. Someone I trust suggested that the wiper may actually go past minimum and back onto maximum when it switches off. The sound dissipates as the charge drains off at shutoff. It doesn't happen when I unplug it.
Has anyone repaired one of these wipers?
Can you take a picture under the chassis? I can't find C31 on mine. It's listed as a molded .01uf 600V cap. I'm wondering if it's missing. It should be near the diodes.
So, I may be in the market for an untested unit. One never knows.