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daveshaw.one.eight
 Post subject: 18 Watt - Fizzy Decay?
PostPosted: Sun Sep 27, 2020 11:26 am 
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Joined: Wed Nov 29, 2017 12:30 pm
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Location: Newfoundland, Canada
I've been enjoying my Plexi 18W (with VRM) for a few years now, but have noticed that there's a fizzy/buzzy decay to the notes. A quick google search..apparently this is a known issue with EL84 18-Watters, crossover distortion perhaps?

Has anyone else experienced this issue? Apparently there's a Paul Ruby mod that employs a few Zeners to help snub crossover distortion.
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coco
PostPosted: Wed Sep 30, 2020 3:05 pm 
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Holy Ghost
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Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7518
Location: Canada
There’s a whole thread on this. forum about chasing down the fizzies. I’ve never had the pleasure!

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Traynor
PostPosted: Sun Oct 25, 2020 8:15 am 
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Joined: Tue Oct 18, 2011 10:03 am
Posts: 5
I've changed many new mica caps in the last few months. Whenever I get a strange sound that puzzles me It's usually the mica cap in the tone stack. Even in locations where there is no voltage (treble bleed), their just noisy, maybe I bought a bad batch. Fixed the problem every time. I'm not saying this is your problem but it's with looking into, or to keep in your pocket.
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coco
PostPosted: Sun Oct 25, 2020 10:49 am 
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Holy Ghost
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Location: Canada
Traynor wrote:
I've changed many new mica caps in the last few months. Whenever I get a strange sound that puzzles me It's usually the mica cap in the tone stack. Even in locations where there is no voltage (treble bleed), their just noisy, maybe I bought a bad batch. Fixed the problem every time. I'm not saying this is your problem but it's with looking into, or to keep in your pocket.


What are you using to replace Silver Mica?

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Stephen
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Traynor
PostPosted: Fri Nov 27, 2020 10:29 am 
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Joined: Tue Oct 18, 2011 10:03 am
Posts: 5
I'm either finding a good one or using used ceramic disc.
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otis
PostPosted: Tue Jan 03, 2023 11:32 pm 
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Joined: Tue Jan 03, 2023 11:16 pm
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I think I should look for used ceramic dishes, it will save quite a bit of money.
among us
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