Re: Brunetti Mercury
Posted by Frank_NH on Apr 29, 2016; 8:06pm
URL: http://guitar-fx-layouts.238.s1.nabble.com/Brunetti-Mercury-tp25277p30119.html
The JFETs don't have to be "matched" here. The trimmers are there to permit you to dial in the proper bias at the drains of Q1 and Q2 (~ 9-10V). As long as you have good JFETs this should work.
Good looking build Strassercaster!
By the way, this is different than a BSIAB, or really most overdrive/distortions in that it uses the op amp to overdrive the JFET gain stages. This is similar to overdriving an amp with a tube screamer, which is what I thought was interesting about this design. I also found the tone controls to be very effective.
Alex has a new layout on the main page, so you can build it again for your other guitar-playing friends!
URL: http://guitar-fx-layouts.238.s1.nabble.com/Brunetti-Mercury-tp25277p30119.html
The JFETs don't have to be "matched" here. The trimmers are there to permit you to dial in the proper bias at the drains of Q1 and Q2 (~ 9-10V). As long as you have good JFETs this should work.
Good looking build Strassercaster!
By the way, this is different than a BSIAB, or really most overdrive/distortions in that it uses the op amp to overdrive the JFET gain stages. This is similar to overdriving an amp with a tube screamer, which is what I thought was interesting about this design. I also found the tone controls to be very effective.
Alex has a new layout on the main page, so you can build it again for your other guitar-playing friends!
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