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Old March 29th, 2012, 11:14 AM   #1 (permalink)
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EP Booster or EP-Pre Schematics???

I want to build an echoplex preamp to color my sound. I have found the echoplex schematics except the actual EP-3 preamp is running at 18volts. The EP-pre and EP-booster run at 9 volts so I won't have to find another adapter.

So can anybody help me out?

Thanks guys!

Danny

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Old March 29th, 2012, 11:55 AM   #2 (permalink)
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The EP Booster is not actually an EP pre-amp.

Apparently Brian at Mad Bean dealt with this 18v issue in his Fat Pants
Echoplex styled booster. Check out the Madbean site for more
info, as I believe it can be run at 18v.
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Old March 29th, 2012, 12:31 PM   #3 (permalink)
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You could add a charge pump to get 18v from 9v.
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Old March 30th, 2012, 10:46 AM   #4 (permalink)
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google "ep booster vero layout" ... I initially put the image up and thought better of it
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Old March 30th, 2012, 12:26 PM   #5 (permalink)
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MadBean's Fat Pants includes a charge pump right on the board, so you supply it with normal 9 volt power, and it creates its own 18 volts. Easiest route to an EP-style booster I know.
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Old March 30th, 2012, 02:17 PM   #6 (permalink)
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I like mine. Sounds better, and is more flexible
than the EP Boost I had and sold.
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Old March 30th, 2012, 03:10 PM   #7 (permalink)
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Okay, I think i'll use the ep booster for my dirty signal as a slight boost and the madbean as a little "tone in a box" thing for my cleans.
So i'll build both!

http://diy-layout.com/66

http://www.madbeanpedals.com/projects/index.html
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Old March 30th, 2012, 11:08 PM   #8 (permalink)
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Check out Fred Briggs EP booster blog at http://revolutiondeux.blogspot.com/2...p-booster.html for some EP history and mods.
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