79 Deluxe Reverb volume problem
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79 Deluxe Reverb volume problem
Signal seems to be getting by this volume pot when it is turned down. Swapped the pot over from the first channel and the same issue . Anyone run into this issue ?
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Forrest Gump
Forrest Gump
Re: 79 Deluxe Reverb volume problem
#1 test the tubes.
#2 voltage chart the amp.
If you don't have a tube tester swap V-1 and V-4 12AX7
#2 voltage chart the amp.
If you don't have a tube tester swap V-1 and V-4 12AX7
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Stevem
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Swap the first preamp tube with the second, does the issue then move to the other channel?
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Re: 79 Deluxe Reverb volume problem
Make sure the path to ground is good. I think this means its physical mount to the chassis in this case.
If it says "Vintage" on it, -it isn't.
Re: 79 Deluxe Reverb volume problem
If it's just a little signal, that's normal. Most pots don't actually get all the the way to the ground terminal. If it's a big signal, you have a bad ground, or a bad pot.
Re: 79 Deluxe Reverb volume problem
Or a bad tube - really!
It may be not be credible until it's been personally experienced.
It may be not be credible until it's been personally experienced.
My band:- http://www.youtube.com/user/RedwingBand
Re: 79 Deluxe Reverb volume problem
I'll buy that. The signal appears at cathode and plate.pdf64 wrote:Or a bad tube - really!
It may be not be credible until it's been personally experienced.
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Stevem
- Posts: 4611
- Joined: Fri Jan 24, 2014 3:01 pm
- Location: 1/3rd the way out one of the arms of the Milkyway.
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You never play the amp on zero anyway, so why the fuss?
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
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JazzGuitarGimp
- Posts: 2355
- Joined: Mon Jul 23, 2012 4:54 pm
- Location: Northern CA
Re: 79 Deluxe Reverb volume problem
When I was a teen, I had a friend who had a peavey head & cab. we'd be in his bedroom with the door closed and he'd playing his guitar. All of a sudden, his mom bursts through the door and yells "turn that thing down!" And he'd show her: "look mom, the volume control is all the way down!" - which it was. When she left the room, we both laughed because the two of us knew good and well that the guitar had a volume control too. 
Lou Rossi Designs
Printed Circuit Design & Layout,
and Schematic Capture
Printed Circuit Design & Layout,
and Schematic Capture