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You will have to see how much cogging this DC motor has

One of the great songwriters and voices behind Supertramp. All time great band.

I think it was recognition of too much weed smoking on Halloween. Don't destroy them, you will want to put them back in after debug.

To defeat the power up muting circuit, pretty straightforward, remove Q103 and Q203 temporarily. I also think the headphone jack defeat is possibly a culprit, that looks sketchy at best and not clear how it is implemented. Phone jacks are notorious for the nickel plating oxidizing and getting...

Defective muting circuit? Have you tried defeating it to debug your issue?

Ain't that the truth...

The Model ONE does that already Mark, as you are aware.

Yes, less likely than at a solder joint connection but yes.

It could be anywhere on the board that has an intermittent. However, it is not the tone pots if you have the switch in the OUT position. I would recommend a careful look under magnification of all the solder joints. They are approaching 50 years old...

It is most likely that the physical motion of turning the tone pot restored a marginal PCB connection somewhere rather than the pot being involved. This is fairly classic behavior on some PL preamps, particularly the infamous PL4000 preamp, marginal solder joints.

Looks good Jer, hoping the new authentication stops the Russian BOTs

Motorola VME Bus standard...

Nuked another Russian BOT

Live long and prosper Gene!

If you think it is really the pots, you can debug by tacking a resistor to emulate the wiper setting in parallel with it and if the cutting out goes away, you know where to start looking.

Do they offer it in the Burberry edition?

If they are the same size as the ones used on the PL700S2, I created a model to 3D print them

Had a lot of fine seafood Perry, but not that.

We ate late lunch/early dinner on Friday at the Pink Door, a classic and famous Pikes Marketplace eatery. It was like a freak show looking at all of the wait staff and about 50% of the customers

That and the ugly females(?) with the ugly tattoos all over their bodies...