Its a bad LDR. It is a VERY common problem on these units. I had the LDRs changed out in mine by Mesa once when the unit was about 10 years old. About 10 years later had the exact same problem you are having with channel 2. I changed the LDR for that circuit which fixed the problem. I sold...
I can't speak to all the LSCs but the early ones had problems with the screen grid resistors blowing if the power or rectifier tubes got a little iffy. The end result could be a partially working but sometimes noisy amp.
I have a very early SN LSC v1 that suffered a tube fail which, I later...
I've not been trying very hard to sell these pieces but have decided it is really time to move them on to someone who will actually use them. I'm in NorCal (Disco Bay for the locals). Given the weight and number of tubes involved I'm not interested in shipping. I'm willing to meet anywhere from...
FS: Mesa Maverick factory headshell. This will fit the chassis from a 2x12 or 4x10 maverick combo. This is a complete shell with reverb tank, back brace and wiring (you will need to supply the mounting bolts and chasis straps). I used it for a quick swapping my Maverick 2x12 combo to a head...
Here is a bit of an oddity -and quite rare. It's an 8 space Mesa/Boogie Diesel rack from the 80s.
These were made with non-standard rack rails that accepted square nuts in a track. The rails were not tapped -sort of a pre-cursor to the SKB rack rails. I have 12 original nuts/screws for it...
Have these posted on another forum and have been getting inquires on package prices for the Quad/Simul. If you are interested in a package deal PM me an offer.