My amp idea of Vox AC30 - need help

[mlp-mx6]

The "center tap" (tail) of the bridge is not actually grounded in the Mesa schematics.

I think what most folks are warning against is grounding the xfmr center tap AND grounding the tail of the bridge. If you do that you WILL have a fried xfmr.

[Kagliostro]

Thanks for the advice

I've also examples were Mesa didn't connected the 6.3v CT to ground

see the attached images

but this is because all the other schematics have a mistake or what ??

MORE CONFUSED THAN BEFORE

Kagliostro

[markr14850]

I'd suggest you build a small prototype board with a few tubes, and try out the various heater schemes. (I built something like this: http://www.tubelab.com/The_Tubelab.htm) Try them yourself before you become attached to any one way of doing things. Use a scope to verify that the heater "signal" is not showing up on the plate.

[Kagliostro]

Thanks

that is a feasible thing

1 hg of prevention is better than 1 Kg of remedy

Kagliostro