Treble and Bass pots not right. New build

[MickeyB]

After staring at this thing for 3 hours, making sure wiring is right. I've given up and need to see if someone has any ideas on whats going on. Its a Fender Vibroverb 6G16 clone. The treble (350k 70k tap) on both channels act like bass when you turn them up. And both bass pots do not do anything to the sound. Volumes, reverb, vibrato all work fine.

[PRNDL]

There's a wire on both bass pots that's not shown in the layout.
It connects the top and middle lugs.

If you have a camera, post a photo of your build.

[Jag]

There's not supposed to be a connection between middle and top for that amp, the Fender layout doesn't have it either. It wouldn't make a difference to the operation anyway, it would still be like a rheostat since only the grounded leg and wiper would have any effect.

Pictures would be helpful though. Double check your wiring. Since you have the same issue on both channels, I'd suspect a wiring error due to mis-reading the layout.

[MickeyB]

Sorry, I can't get a good close up pic of it. I don't think I have these pots wired right. I'm a little confused with these tapped pots. Heres what I got taking ohm readings off the pot. lug 1 is the farthest right looking at the back of the pot.(just like the layout shows) Lug 1 to 2 is 207 ohm always. Lug 1 to 3, dial-1 is 47 ohm, dial-5 is 0 ohm, dial-10 is 207 ohm. Lug 1 to 4, 47 ohm always. Lug 2 to 3, dial-1 is 232 ohm to dial-10 is 0 ohm. Lug 2 to 4, 232 ohm always. Lug 3 to 4, dial-1 is 0 ohm to dial-10 is 232 ohm.
Right now I have lug 1 to 250pf, lug 2 to volume pot, lug 3 to cap/ground, and lug 4 to bass pot.
The above ohm readings are in circuit.
Thanks

[Jag]

In circuit readings won't mean anything in terms of the actual values of the pot. Your description sounds like the connections are right but, obviously something's wrong. The problem might not be right at the pots though. There could be a problem elsewhere and it's just manifesting on the controls.

Lug 2 - 3, using your terminology and numbering, should read 0 when the pot is turned all the way down and should have some other reading at any other setting. Unless you posted your setting backwards, that sounds fishy. In circuit or not, if the pot is all the way off, lug 2-3 should be a short. Likewise, Lug 2 - 1 should read 0 when the pot is turned all the way up and some other reading at any other setting. Other than that you'll probably find that all the other readings will change if you change the setting of the volume or bass pots.