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Topic: Strange Volume Pedal Issue |
Rick Abbott
From:
Indiana, USA
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Posted 17 Jul 2019 5:56 pm |
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I was at a recording studio last week. The owner offered to let me use some of his amps, so we tried out a 1930's EH-150, and it was great, except the filament rattle on a preamp tube. The second amp was a late 70's Deluxe Reverb. When I played, immediately it sounded like my volume pedal had a bad pot...very scratchy. Thought it might be the amp and moved on to a blackface bandmaster...same noise. Threw out my VP and used the guitar player's ernie ball...same scratchy sound. Owner gave me a morley pedal with an impedance matching circuit and battery. Problem solved.
My pedal works on my amps: Tweed Deluxe, Twin, Session 400, peavey studio pro 50. Why not his amps? Is there some kind of voltage back-feeding out of his amps? I've never seen such a thing.
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RICK ABBOTT
Sho~Bud D-10 Professional #7962
Remington T-8, Sehy #112
1975 Peavey Pacer |
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Ian Rae
From:
Redditch, England
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Posted 17 Jul 2019 9:27 pm
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Certainly sounds like DC on the pot.
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Make sleeping dogs tell the truth!
Homebuilt keyless U12 7x5, Excel keyless U12 8x8, Williams keyless U12 7x8, Telonics rack and 15" cabs |
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Rick Abbott
From:
Indiana, USA
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Posted 18 Jul 2019 5:15 am
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That's what I was thinking. Some of the guy's gear is not maintained well, and I think his amps are due for some new caps.
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RICK ABBOTT
Sho~Bud D-10 Professional #7962
Remington T-8, Sehy #112
1975 Peavey Pacer |
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Eric Dahlhoff
From:
Point Arena, California
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Posted 18 Jul 2019 6:51 am
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Yep - the input cap on the amp is leaking DC to your pedal.
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"To live outside the law you must be honest." (Bob Dylan) |
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