5-Band-EQ pedal kit

I built this pedal to have an EQ so I can tweak and shape the sound for various purposes.

For this purpose, the pedal works great. It also fits a 1590B, although you need to be precise with the pot holes drilling.

BUT:

1) I think the stock frequencies (which come from the EQ chip documentation) dont suit guitar very well. Instead I ordered capacitors for the following settings:

- F1: C0 = 1 uF, C = 22 nF (gives f = 120 Hz, Q = 1,1)
- F2: C0 = 0,33 uF, C = 8,2 nF (gives f = 340 Hz, Q = 1,2)
- F3: C0 = 0,15 uF, C = 3,3 nF (gives f = 790 Hz, Q = 1,1)
- F4: C0 = 47 nF, C = 1,5 nF (gives f = 2100 Hz, Q = 1,3)
- F5: C0 = 27 nF, C = 390 pF (gives f = 5430 Hz, Q = 0,9)

This way we have more appropriate bass, lo mids, mids, hi mids and treble controls suitable for guitar. (I actually labelled my pots this way.)

3) The Musikding BOM has an error: the kit comes with two 6.8k resistors (which is correct as per the TH Custom docs), not 68k. This led me to believe that 68k was really necessary so I soldered these initially. The sound was not at all as expected. Placing pots at 12 oclock would not give a flat EQ at all. After I switched resistors, it was the case -- fortunately! So, be sure to use the 6.8k resistors that come with the kit.

4) Including a 3PDT wiring board with the kit would make wiring of the 3PDT, R_led and LED much easier.

5) I think this would be better with a volume pot added to the PCB (this is more of a suggestion for TH Custom). I initially thought of adding one myself between the board OUT and the 3PDT, but couldnt find an esthetic placement for it while keeping the W pot layout. A 2x3 pot layout would be nice, but currently would require wiring pots to the PCB instead of using the handy PCB mounts.

So in the stock version Id give this a 3-star rating. Quite happy with the resulting pedal with improved C values though!

Florimond M., 21.01.2024