Yeh mate Aussie all the way
Signal path
EMG 81/707》
Behringer rack tuner 》
digitech GSP1101 》
GSP 1101 mono fx loop out split with Y cable 》
LEFT: JMP-1 》DBX stereo 15 band EQ 》STEREO Sonic Crapuliser 》GSP 1101 loop return left 》Gsp 1101 line out left 》 Marshall EL34 100/100 Power amp left
RIGHT: MP-1 》DBX EQ 》Sonic Crapuliser 》 GSP1101 loop return right 》 GSP1101 line out right 》 marshall power amp right
Its a bastard intermittent problem that no amount of cable or jack jiggling can reproduce. Hopefully its a tube. Obviously i thought the Y cable was a potential trouble spot. I bought every Y cable on ebay and worked my way through them. Of course the cheapest had the most solid connection. The sockets were slightly larger and loose fitting on the more expensive cables go figure.
U guys helped out before when a chip controlling the eq was faulty. I also upgraded the eprom at the same time. Will put tubes in now and try the maintenance tips and see what happens. And report back when i have something...or nothing haha