YAMAHA G100II input jack wiring

[Jazz P Bass]

OMG, the previous work on that board is criminal.

I think the jumpers are factory installed.

[czech-one-2]

I think the jumpers are factory installed.

Yeah...looks stock. :-DD
I gotta give em' credit for even trying to salvage that board, but obviously it was in vain.
Anyway, the amp is not on my bench [desk] right now. But I will try Enzos idea first, and if that doesn't work I'll try to remove the 'low' jack from the pcb and attempt to figure out how to wire it to the mono 'hi' switchcraft jack, if it even still works...

[czech-one-2]

ANy Fender, like an AB763 Deliuxe Or even a 5E3

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Enzo, one question:
Would you use only the 'high' jack + input wire to the main pcb, remove the 'low' jack + input wire and jumper the 47k and 15k wire on the main pcb? Then use the standard dual 68k's off of both jacks to the one 'high' input wire?
I haven't tried that, but that should work yes?

[Enzo]

Well, it has worked for Fender for, oh, 60 years or more?

The highness and lowness is a product of the jacks anyway. They decide on high or low level.

[czech-one-2]

Thanks everybody that took the time to reply. The dual 68k Fender wire-ing is perfect. I just needed to remove one of the ground and hot wires from the main PCB and the 47k/15k resistors. For some reason I was unable to figure this out on my own which is why this is probably the best webpage in existance with the most helpful members . It is cool having proper switchcraft input jacks in an old amp like this, and the 'low' input is probably loud enough for any stage. I had to enlarge the jack holes, not only on the chassis but also on the mounting plate for the A/B channel switch.It's mounted on a plate that the input jacks hold in place.
Quite possibley the best 'clean' guitar amp ever made!!!
ENZO, if you ever find yourself in Prague,Czech Republic beers on me! [I owe you quite a few at this point!]

[Enzo]

Not likely I will travel overseas at this point, but if you are ever in Mason, Michigan, I live right next door to a brewery...