Matamp Quasar 500 and Laney VH100R guts

DSCF3367

Showed up set to bridge mode, had to open it and find the switch. Turns out not on the side with the diagram. Do spot a toasty looking resistor bottom left though. Still tested right, luckily as it was missing a stripe.

DSCF3369

DSCF3374

Right side this time, showing the classic K135 and J50 mosfets. Hand marked bridge/stereo switch on the pcb to the left.

Other thing:

DSCF3357

Laney VH100R, made a bunch of noises and blew a fuse.

DSCF3360

A shorted power valve, a miles out of spec (like, measured a couple of meg rather than open) grid resistor. Suspect someone tried a ‘fix’ by swapping positions before selling this as ‘working’. Couple of dud pres too.

Advertisements