trinityamps.com

yeah they're dual ganged.. so I need to move the jumper wire and resistor to the top row with the rest of the connections?
and yeah.. they're about twice as thick

made the changes... treble, master volume and VRM all seem to work. The volume and bass push pull are still not working.

you made those changes to BOTH of those dual ganged pots right?

I didn't have to make any on the bass. Also,when fat mode is engaged the sound gets louder.

Only using one of the gangs on the Bass pot and have the wire from the treble pot lug1 to bass pot lug 3?

Yes

On the switch associated with the volume pot. the short purple jumper should go to the center lug of the switch. is there a short to the outer lug on the switch?

so the jumper should go to lug 2? I have it on 1. I'll make the changes.

wait!!! It's ok on the pot end.. but it looks like there might be a short between 2 lugs on the SWITCH!!!

ok, i didn't make the changes cause I reread what you said... so which lugs on the switch should i be checking?

look to where the short purple wire attaches to the SWITCH. It should go to the center of the 3 lugs. It looks like there might be a short from there to the adjacent lug on the switch ( the one with the 220K resistor)

nope, no short.

So the volume (gain) control has absolutely no effect?

correct

when you migrated all the wires to one gang you included the center conductor of the shielded wire?

yes. all of the connections are on the correct lugs on the top gang.

Can you check with an ohmmeter that Lug 1 of the volume pot is grounded!? It does so via the input jack which itself has a ground connection at the lug bolted to the chassis.

pardon my noob-ness... but how do I go about doing that?

Turn off the amp. Set you meter to the ohms scale. If you short the leads together you should get Zero ohms or at least very low ohms ( 1 or 2?). Now put one lead on lug 1 of the volume pot and the other to any spot on the chassis. You should see the same "near zero" reading. If so you can do the same from lug2. Then as you rotate the pot the readings should go from near zero up to several hundred of kilohms.

both readings were what they should be.