What Pedalpcb circuits that are RAT based and what's your favorite?

[eh là bas ma]

Did you match the components of that section?
Ringers always seem to behave better, ime, when you match everything.

I built a musikding kit, so i used parts that i've been sent with the pcb.
What do you mean by match the components ?

 

[jwin615]

I built a musikding kit, so i used parts that i've been sent with the pcb.
What do you mean by match the components ?

Matching the values of the mirrored components in the GR section, *especially* the Vf of the diodes.
I.e. not a 10.1k for R12 and 9.92k for R11


I don't know if every component is absolutely necessary, but it's only 8 so not hard to do if you have the inventory.

 

[owlexifry]

Matching the values of the mirrored components in the GR section, *especially* the Vf of the diodes.
I.e. not a 10.1k for R12 and 9.92k for R11
View attachment 86914

I don't know if every component is absolutely necessary, but it's only 8 so not hard to do if you have the inventory.

i recently did a parenthesis/life pedal V1 on vero (build report pending).
prior to starting the build, did some breadboarding to test out a LM308HZ for the rat segment, and then separately did a green ringer, as i'd never tried one before.

- grabbed this schematic, plopped it into the breadboard, and at first i was like gee whiz this green ringer kinda sucks.
- started with 2N5088, 2N3906, and a matched pair of 1N4148. not very exciting, pretty weak.
- then swapped in 2N5089, 2N5087 (per parenthesis schematic) and a matched pair of 1N5817 (seemed to be a frequently recommended option per @Nostradoomus ) - a little better, the octave was there, but still, i dunno just wasn't great.
this had me kinda bummed. still, pressed on and built the board.
given some comments I've seen on here about matching everything in the octave section, i elected to do so.

so yep, i measured and matched everything here as close as i reasonably could.
- gathered a pair of D9E that matched at 0.33V (i'm certain i had read comments from @bean suggesting that 0.33V is an ideal target)
result:
even as a huge newbie to this kind of a circuit, i feel like the matching of these components, (in addition to matching the diodes) made a noticeable difference.

 

[Nostradoomus]

It definitely does!