The D.I.Y. FX Pedal Building Thread

[kimball492]

Cool Doc what chip does the OD-1 use

[DrNomis_44]

Cool Doc what chip does the OD-1 use

I think it's the venerable, and much sought-after, JRC4558D chip that was used in the OD-1, I could be wrong though, but it is the most likely chip that was used due to it's cheapness, there are a few alternative chips you can use in the circuit, which are pin-for-pin compatible with the pin-out of the JRC4558D, a couple that come to mind are the TLO72CP, and the LM833, there are a couple of high-end chips which are also pin-for-pin compatible too.


The TS Tube Screamer circuit and the OD-1 circuit are very similar to each other, the only difference being that the OD-1 doesn't have the extra tone-control stage included, so you only have a Drive control and a Volume control.