This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Thursday, October 10, 2019

DOD 210 FET Preamp

Got a little simple boost/preamp for your Thursday. Should be a pretty easy fit in a 1590A. J113 alternatives would be J201, 2N5457, and probably a couple other JFETs that are obsolete. 😑



6 comments:

  1. Verified! I used J113. The tone is a little muddy...

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  2. Verified! With J201 sounds very good

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  3. Replies
    1. It should. You may want to up the value of the 47nf cap though.

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  4. Built it, definitely works and gives plenty of volume boost, however with 2N5458s, it did sound pretty muddy like Marcus Corradini said. Did not sound actually muddy the way a fuzz does, but sounded like the transistor was pretty misbiased. Swapped out for a J201 and sounds way better with more clarity.

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    Replies
    1. I get this soluction to 2n5457: I put a 10k resistor between the source and 47uF capacitor, and change the drain resistor from 22k to 100k. Maybe It help you

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