5E3 Pre-phase inverter master volume not muting signal

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professormudd
Posts: 405
Joined: Thu Jul 16, 2020 6:53 pm
Location: Southern California

5E3 Pre-phase inverter master volume not muting signal

Post by professormudd »

Greetings,

I built 2 5e3s, both of which I have added the pre phase inverter master volume modification as laid out on Rob Robinette's site. I notice that while it does significantly reduce volume, it never mutes. I verified the pot sweep on my multimeter. I was wondering if this is typical. If not, do you have any recommendations for what to check?

If this is typical, can you recommend a more effective master volume implementation?

I did try the "Trainwreck style" post phase inverter master volume as described on the same site, and it definitely muted, but there was very little sweep. It was more of a mute dial than anything. It was mute at 0, and crazy loud any higher.
-Matt

It may very well be that the sole purpose of your life is only to serve as a warning to others.
sluckey
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Re: 5E3 Pre-phase inverter master volume not muting signal

Post by sluckey »

That pre PIMV will not totally kill the sound. The design will not allow total muting. Usually not a problem though.
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thetragichero
Posts: 478
Joined: Tue Sep 10, 2019 7:46 pm

Re: 5E3 Pre-phase inverter master volume not muting signal

Post by thetragichero »

makes sense that it doesn't totally mute since at minimum there's 56k to ground
PRR wrote: Plotting loadlines is only for the truly desperate, or terminally bored.
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