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.

Tuesday, March 26, 2019

Keeley 1962

Take a Blues Breaker and mash it between two Katana boosts and you have the 1962. Couple minor differences from a typical Blues Breaker beyond that. Trace over on FSB. There are two versions of this circuit, the 1962 and the 1962x. As far as I can tell, the only difference between the two is the clipping. I've added a DPDT toggle to switch between the two versions.


There's also a fabricated version in the store, the LXII.




A couple notes:

When I verified the fab'd version I didn't notice much difference tonally between the two clipping settings, so you may want to either leave it out or experiment with that section. I changed the value of the resistor from 9v to the drain of Q3 from 47k in the trace to 22k. Wouldn't bias properly otherwise. Also for the caps with questions marks in the layout above I used 10nF, except for the yellow cap to the right of the IC, which I used 100pF.

19 comments:

  1. diodes 4148s reemplacement 4001 maybe sound different!! very good thnks so much!!! EXCELLENT

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  2. Parabéns pelopotimo tebalhtr com os layouts, esteeja está verificanddo?

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  3. Parabéns pelo otimo trabalho com os layouts, este ja está verificado?

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  4. Ainda não ... apenas a placa fabricada foi verificada.

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  5. Works great, I might mess a little with the tone cap on the top end but this does sound fantastic. Thanks for another great layout!

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  6. 2N5458 does't work but J201 does. Very mysterious.. Anyway, thank you very much for sharing this one. I like it!

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  7. Just finished this one using 2n5457 transistors. Sounds great. I hear a very distinct difference with the clipping switch, well worth including it in my opinion.

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  8. but I get only clear sound, no distortion. What can it be...

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  9. @Effects Layouts, the 100nF electro cap, is that 100nF or did you mean 100uF?

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    Replies
    1. Cool thanks! Hey man, thanks for everything that you're doing here. Happy new year to you and your family.

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  10. Replies
    1. Haha yeah saw those. Tried to click on the link for the store but I guess the LXII is no longer available?

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    2. The board didn't sell all that well, so I didn't keep it in stock :\

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