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Title: Gain mod for BF Vibro Champ Post by: Travst on January 27, 2009, 12:49:09 AM Nik turned me on to this great mod. I replaced the standard volume pot with a 1M push/pull pot with two solder lugs:
(http://www.hoffmanamps.com/MyStore/catalog/images/potswitchturn.jpg) I borrowed Hoffman's pic because I bought the pot from him. ;) 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: (http://farm4.static.flickr.com/3409/3229381175_0b83d8a84a.jpg?v=0) In position 1, the amp is very clean and has less volume. In position 2, it's big and fat with extra gain. Title: Re: Gain mod for BF Vibro Champ Post by: petesguitar1 on December 04, 2009, 11:37:46 AM I posted this elsewhere but thought I might get more luck with the tweakers...
"http://www.youtube.com/v/9w81XzsJl3E&hl=en_US&fs=1& |