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, June 16, 2022

Greer Amps Soma 63 Preamp

Cool JFET preamp circuit from Greer. Its supposed to sound like a Brownface-era Fender amp. I'd be curious what it sounds like without the transformer. Should fit just fine in a 125B with top mounted jacks. Schematic for reference.




8 comments:

  1. By emma electronics https://www.freestompboxes.org/viewtopic.php?p=291206#p291206

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  2. Buen dia. en cuanto me llegue el transformer , les apoyare con verificar.

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  3. Good day. I already have the transformer, but I don't know the orientation of the pins. Could you tell me which one it is?

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    Replies
    1. Pin one is indicated by the square pad on the toner transfer (top left)

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  4. Ya lo construi. Me gustó su sonido. lo voy a incluir en mi cadena de efectos. Gracias David.

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