Safety resistors on PPIMV - will they affect the frequency response ??

[kagliostro]

Talking about PPIMV and the added safety resistors to prevent missing Bias Voltage if there is wiper loss of contact

we know that turning the shaft there is a modify in the frequency signal that starts from PI and arrive to G1 of the power tubes

I would like to know if the presence or not of the safety resistors (between wiper and G1 of power tubes) will modify the frequency responce somehow

Thanks

Franco

[d95err]

What type of PPIMV? What value safety resistors? What value pot? What value coupling caps? What type of phase inverter?

[kagliostro]

OK, the LarMar with 2.2M safety resistors 1M dual ganged pots

Coupling caps .... standard or KOC improved version

Franco

[pdf64]

1M pot; a LarMar uses 220k or 250k stereo pot?

[kagliostro]

I got confused remembering the Type 1 on The_Trainwreck_Pages



and used the name LarMar

Franco

[Ronquest]

If the wiper looses contact, how will the bias voltage be lost?  Am I missing something?    You would only loose bias if your .1uF capacitor shorted and your volume pot wiper was turned down/off/short to ground.

The bias voltage (DC) is not going through the pots.

EDIT to add.  TYPE 2 PPIMV would loose bias if the wiper lost contact

[kagliostro]

Right

I mixed too many memories together















Franco