How PPIMVs are ended

[sepulchre]

What I mean by that is that I've researched these, mostly lookin at the LarMar examples. They are all "ended" with the "ground" lead going to the bias voltage.

I built an amp, my Harlow design with help from a few folks here, has a PPIMV which is simply connectd to ground. Is this acceptable? Seem to work fine on my prototype model (which sounds Great, I might add). Or should my future builds have it going to the junction of the power tube's cahodes and the R/C grounding path?

Thx!

[tubeswell]

Ground return is ideal for making sure the grid is at ground potential

[katopan]

Ground for cathode biased, bias supply for fixed.

[martin manning]

Or should my future builds have it going to the junction of the power tube's cahodes and the R/C grounding path?

I would ground the PPIMV pots with the power stage cathodes or screens.

[JMFahey]

What katopan said.