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Old 3rd December 2012, 01:59 PM   #1
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Default Reverb for project valve amp

Hi there.

Looking at getting myself a project to work on over Christmas.

Amp Maker: Guitar amp kits and parts :: Guitar amp kits :: Double Six switchable power amplifier

Want to add a valve reverb unit in it like on an old fender or vox amp. Does anyone know any kits to use or have any advice?

Thanks
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Old 5th December 2012, 07:44 PM   #2
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I have a Peavey Valverb reverb & tremolo I just put in the effects loop.

Weber has an IC tremolo kit for tube amps, but not a reverb, though they do have a "general purpose gain stage" add-on sub-chassis that would do nicely.

https://taweber.powweb.com/store/modkits.htm#gpgain
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Old 12th December 2012, 11:47 AM   #3
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I'd get a kit with a reverb. You won't fit the extra valves in the kit's chassis so you'll have to have separate chassis for the reverb's circuitry, match the B+ voltages, and fit the tank in your case too.

You could maybe fit the accutronics belton brick in your kit. It's a reasonably good digital reverb made by the guys who make spring reverb tanks in an attempt to get that same sound. I like it, but many don't. Support circuitry is pretty small, but solid state. It won't thunder when you hit the amp though.
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Old 12th December 2012, 03:09 PM   #4
JMFahey is offline JMFahey  Argentina
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Or you might do what most tube amp makers do (Peavey/Laney/Marshall/etc.) and add an SS reverb circuit there.
Here's how Fender does it: slams the reverb circuit between the full tube pre and power amp.
No big deal, after all it's an effect.
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Old 12th December 2012, 03:36 PM   #5
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Click the image to open in full size.Looking at the construction manual it looks like there is room for two 9 pin sockets. I think I would use the circuit from a fender aa763. I would add terminal strips near the sockets and build it point to point. and then implement the circuit the same way fender does http://www.webphix.com/schematic%20h...a763_schem.pdf

Last edited by jeeptechfred; 12th December 2012 at 03:38 PM. Reason: add photo
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Old 13th December 2012, 05:27 PM   #6
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There's some schematics on The Valve Wizard
and I know I saw lots more...
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Old 13th December 2012, 06:00 PM   #7
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Quote:
Originally Posted by cyclecamper View Post
There's some schematics on The Valve Wizard
and I know I saw lots more...

Very nice!
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