Traynor YBA-1A lowering the plate voltage

[copperheadroads]

Is that the same as this one?
[ATTACH=CONFIG]40820[/ATTACH]

Yes it is .

[big_teee]

Could you post a picture of the dual pot wiring?
T

[mozz]

It (CCW)should put both the wipers right at ground so you should have no signal at all. Sure you have the pots common ends at ground?

[copperheadroads]

I had this PPIMV installed on this amp for about a month & it worked great untill i a day ago when i did the mods of turning it into a jcm style amp ,I've cascaded the gain stage like the jcm 800 using a layout like this

[The Dude]

It (CCW)should put both the wipers right at ground so you should have no signal at all. Sure you have the pots common ends at ground?

^^^ That. Turn the pot all the way down and check for continuity from the wipers to ground. Both wipers should be at ground potential.

[copperheadroads]

When the pot is turned all the way off there is continuity on the middle lugs only from the ground ,No continuity on the far right set at all not matter where the pots is turned

[g1]

Continuity on a meter usually refers to some low resistance, maybe less than 40R or less than 200R depending on meter.
On ohms scale, what is the reading from middle lugs to ground, with pot turned all the way down?

[copperheadroads]

I had to redo my wires as coming from the PPIMV not sure what happened , I used a wire similar to Gibson shielded wire like the have in there pickups only this stuff has a Teflon insulation on the center wire & i heat shrink tubing over it ,not sure what happened maybe the center wire touch the ground somewhere ... I redid the wires & it's working properly now .