[R-390] For the r-390 wishlist -- Things for the R-390/URR

[Tom Norris]

Since Dave Medley retired, we've only see a few bits here and there on
the R-390 vs the 390A.  Anyone able to add any 390 experience?

I've only recently dug into any R-390's.  The 390A I can almost tear
down and put together blindfolded* - though I'm not sure I can add
anything that hasn't been covered in "Pearls"
Other than the one odd troubleshooting incident written about earlier,
I've not ran into many things that weren't simple by-the-book fixes.

Reason I ask about the R-390 is I have 2 here that don't seem to have
simple by-the-book problems. (they'll get back up on the bench
eventually)

*Roger's suggestion of a front panel troubleshooting guide may have
helped in chasing that odd problem mentioned in the earlier post. 
Though in that case a cigarette along with the blindfold may have been
more helpful...

Tom NU4G