volume control problem

[jasper]

Does the tone dampen on anyone's guitar when turning the volume down? I just bought a 1967 Harmony H-78 and the volume knobs are functioning as tone controls.

[Gtr_tech]

That effect is due to loading. A .001uF cap across you guitar's vol pot in/out terminals will fix that. Smaller values down to about 220pF will lessen the tendency for the signal to brighten as you roll the vol down. Myself, I like that extra brightness and use the .001.