Totally forgot to take a pic of the front, but not a hard one to track down. Hiwattish preamp by Dave Green, coupled with a ICE power module by Bang and Olufsen. Took apart as cut out at a gig.
Not sure of the function of topside PCB. Seems a complete pre undernneath and the power module is its own thing. Important thing noted in this pic is ECC82 in the inner position. I totally forgot previous time I whipped the valves out of one, seemed to work happy with an ECC83 in there though.
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.
Right side this time, showing the classic K135 and J50 mosfets. Hand marked bridge/stereo switch on the pcb to the left.
Laney VH100R, made a bunch of noises and blew a fuse.
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.
Tolex stripped and painted, grill cloth gone, so looks a bit alter than it is.
Greenbacks in there. Next is the fun part, no external fixing for holding the chassis. So its guessing at which heads on the chassis lead to getting it out and not making anything inside come loose. It basically works, so not desperate to get inside yet.
Bought dead on ebay, to have a look at. Turned out it was just bunch of dead preamp valve, guy had reloaded it with JJs and they died after estimated 50 hours use.
Front of it, 5150 MKI style, but reverb option.
Random tested parts box valves I stuffed in, the Infinium sorts out the bias for them. Works fine by ear, not sure sticking a probe in won’t interfere with its function, so didn’t.
Inside, the infinium part is the board on the back of the chassis with bunch of push connectors. Small board with ribbon cable is the reverb. Modular inside, would guess lots of stuff in common with other models in the line.
Clsoer shot of the small modular boards, along with showing that the main circuit is pretty normal through hole pcb, not mystical magic that cannot be fixed like is often claimed about these amps. Ribbon cable is data from digital reverb.