12DW7 REVERB DRIVER DOWNLOAD

Jan 30, 5. I set my guitar flat and put an ebow on the strings to get a signal going and these were my readings: I looked at an Ampeg schematic and you’ve got R9 and R8 connected incorrectly. Out of curiosity, did that first tank’s input transducer test okay for continuity with your R-meter? The reverb control has a linear taper. Checking the reverb recovery circuit with a guitar as a signal generator is a good idea. Jan 30,

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Strange that they did it that way–why not just use a lower grid leak? The plate voltage of the first preamp tube could be a little low revefb the K plate resistor and 1. For now, I’m prepared to just use the amp as is. R8 should be connected from the output of the tank to ground.

I’m guessing let me emphasize that this is a guess that you’d want to see maybe 10V AC drive to the tank. Jan 30, 7.

The Amp Garage

Will-Jan 30, Jan 30, 6. Do you have access to a known good replacement tank? V1a plate voltage is on the low side, might cause the guitar’s pots to be scratchy. Hi all, I have been working on a project amp with some success. Voltages are a little higher than I guessed they’d be.

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I have come up empty at some other forums and I took 12ew7 amp to 2 techs in my town who were stumped. Try replacing it with an audio taper type, eg http: You must log in or sign up to reply here.

Swart 12DW7 Reverb – The Amp Garage

What AC voltage are you seeing on the grid of v2A? I can’t believe that two techs can’t find the problem. Awesome–glad you fixed it!

Log in or Sign up. R8 and R9 are definitely wired this way in the original circuit!

It might be possible to drive another amp’s tank while the tank is in the other amp to test the drive circuit, 12sw7 this is risky. All are longtime members that stepped up to the invite to help out by volunteering their time and effort to help the membership experience on TGP stay on the even keel. Results 1 to 25 of I ain’t fussy, they sound fine to me 12d7w I have at least 40 organ pull 12au7s. Yeah that definitely crossed my mind but the tank is an oddball and they’re a little hard to find.

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I can say for sure that the tank is not connected like the drawing. Revreb 30, Checking the reverb recovery circuit with a guitar as a signal generator is a good idea. So i have a super reverb reissue and that i really like, however one thing i really don’t like is how insensitive the reverb knob is.

Some of what I came up with is reeverb gut shots pics of one of those. I guess what I’m saying is that the boutique amp builder may have copied a mistake A special thank you to the ‘new’ guys that helping out.

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Jan 29, 4. I was quite surprised. I want to thank you recerb. The voltage at point A is low, but that would just make the amp sound kind of dark, some people like that.