MODIFICATION Teaser: I've got a Circulator mod in the works

[zeropluszero]

For Mod 14 - I think the circled points for 1U are the anodes for using polarised tanty caps, is this correct?
Naturally on my order I ordered 3 instead of 4, would I be better off substituting 1UF MLCC?

 

[zeropluszero]

Subbed mlcc, oh well.

 

[Chuck D. Bones]

Oh yeah MLCC should be fine. Not my first choice, but good enough.

When I first started building pedals, I bought just what I needed and quickly learned that it's better to order spares and gradually build up an inventory.

 

[zeropluszero]

FWIW, I used MLCC and it seems to be running fine - considering the extensive mods I did on this one I was sure it wouldnt fire right up but it did! Thanks Chuck.

 

[Riccardo Turacchio]

5. Changed the SWEEP pot to C100K

Question:
Is this a typo?
On the part list the Sweep is a 50k linear pot
I'm preparing my order and I want to be sure I have the right parts

 

[Chuck D. Bones]

No, not a typo. 100K gives more range. C-taper gives smoother range.

 

[Riccardo Turacchio]

Amazing !
Thanks

 

[zeropluszero]

I built mine with like 95% of Chuck's mods, and it booted up first time and sounds great.

 

[Riccardo Turacchio]

That's great
I cannot wait to put my hands on this board

 

[matmonster58]

I built mine with like 95% of Chuck's mods, and it booted up first time and sounds great.

what value did you use for Depth? im putting together my parts list right now

 

[zeropluszero]

Looks like I left it at B25K going off the photos I have.

Post in thread 'zero's various pedal builds'

Sep 21, 2024

Circulator phaser with most of Chucks mods. (1 to 12, skipped 13(probably could have done that one) and 14 only because I didn't order enough tantys)
Is there anything nicer in the world than when you do a shitload of mods and it turns on turns on the first time?

• zeropluszero

• 

Chucks Mod's in post #12.
I did 1, 2, 3, 4 (looks very similar to Raspymcnasty's in #43)
5, 6, 7 (dont think i changed C14) 8, 9, 10, 11, 12, 14(or maybe i didnt?)
Didnt do 13, in hindsight I dont much like the vibrato mode either.

for mod 4, I used 14pin dip sockets with the 16pin chips, so I could solder in 1/8w resistors

 

[matmonster58]

Im planning to do 1 (leave C1), 3, 4, 5, 6, 7(leave 14), 8, 9, 10, 12

C7, C9-C11 film
C13-C14 tant
C25k for depth

I'm mostly writing this down for personal reference or ill forget by the time parts get here.

I'm still a little confused on when and where to use tant caps because I there's lots of conflicting info online. Lots of claims that tants sound terrible but that's probably in comparison to film.

From what I understand:
Film>Mlcc (C0G) >ceramic for small values
Film>Tant>Alumium is better for anything in the audio path for large values
Tant and Aluminum are pretty much equivalent in the power supply performance wise

Tants are smaller and more reliable long term than Aluminum but are more expensive and fail more catastrophically
Aluminums come in higher capacitance and voltage values if needed and have more leakage (needed for some designs)