MESA Triple Rectifier Solo Head - Line 6 Spider Valve 112

[n9nu]

Info Needed

ISSUE # 1 - MESA Triple Rec Presence Pot

I don't suppose anyone has a MESA Triple Rec schematic laying around eh or know of a source? Despite being an RF Engineer I would like to look before opening her up.

I have a Channel 2 Presence pot that is presenting...well...no 'presence'.

After I fix whats wrong, it's FOR SALE. ALL new tubes.

ISSUE # 2 - Line 6 Spider Valve 112 PCB board replacement (smaller one as shown)

I am looking for a replacement PCB for a Line 6 Spider Valve 112. This is the shorter PCB which is behind the right side of the amp. It controls: power switch/main volume/standby/LCD display/navigation pad and is connected via a ribbon cable to the longer PCB.


Tnx

Tim
ARS N9NU

P.S. Anyone got any 6146-W (military version) matched tubes. This is for a Ham Radio amplifier project of mine.

 

[fozzy215]

I've used this schematic for my own TR, which is an original 3 channel (the non-multiwatt version): http://diy-fever.com/wordpress/wp-content/uploads/2009/12/dual_rectifier.pdf
There's some hand written notes (not mine) in regards to the relay switching for the various modes in the Presence circuit. I believe some of them may be inaccurate, but I can't be 100% sure.