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|-+  Custom amp building, Prototypes and other amps
| |-+  Mods and Tweaks
| | |-+  Gain mod for BF Vibro Champ
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Author Topic: Gain mod for BF Vibro Champ  (Read 4436 times)
Travst
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« on: January 26, 2009, 06:49:09 PM »

Nik turned me on to this great mod.  I replaced the standard volume pot with a 1M push/pull pot with two solder lugs:



I borrowed Hoffman's pic because I bought the pot from him. Wink  If you need parts quick, he's great.

The 15k resistor that's soldered to the back of the original pot is lifted and soldered to one lug of the new pot.  The 3 upper lugs are connected as per stock.   However, an additional ground wire jumps the pot's ground to the second solder lug:



In position 1, the amp is very clean and has less volume.  In position 2, it's big and fat with extra gain.
« Last Edit: January 26, 2009, 06:55:38 PM by Travst » Logged
petesguitar1
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« Reply #1 on: December 04, 2009, 05:37:46 AM »

I posted this elsewhere but thought I might get more luck with the tweakers...

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