Do a little Diddy

[Sweetzombie223]

I've built 4 BYOC pedals (lil reverb, classic fuzz, green pony, & large beaver rams) and just got the divided octave that I will start soon.
This is my first attempt at sourcing the parts for a pedal.
I want to build a Diddy from Dead End Effects
build doc

I dove into mouser looking for all the capacitors but i can't find a 60pf cap that looks right.
here is my mouser cart
I plan on building 2 and selling 1 I have a bunch of resistors switches and knobs so its not a complete parts list for it

My questions:
I found the caps it says in the doc to be electrolytic 50v but for the other ones i found ceramic caps. How do I know what kind to use? ceramic, metal film, electrolytic. Should I stay with 50v? does it matter?
that dang 60pf cap would a 62pf change the sound much?
I believe the NTE10/3 is the right part but what is XFM1?
using TL074 instad of 64s because I read here it's less noise. I'm not sure if its the right chip/socket to fit the pcb. will the chip fit the socket? and will the socket fit the board?


I hope I can make this pedal. I'm just not sure I got the right parts sourced.

[antonis]

Hi & Welcome..

Any electro cap, other than 50V rated, is stated in build doc..
In general, caps of value smaller than 1μF are non-polarized and can be either film (metal/plastic) or ceramic (disk or multilayer)..
What you have to take into account is their legs spacing - they have to fit on PCB respective pads..

[idy]

Welcome to the forum

You have a surface mount cap in the cart
Look out for SMD; that means surface mount...

It looks like the IC and socket will work.

without looking at the actual PCB and reading each individual electro specs I can't guarantee that every electro will fit. Got a ruler? Got the PCB? Look at the specs for the electro you chose. How big are they? Measure the area available on the pcb.

when you buy from the biggest catalog in the business its easy to go astray.
The companies that cater to pedal builders and DIY generally stock the kind of parts that don't require robot assembly and are no larger than necessary.

The rule is: things larger than 1uf electro. Watch the voltage and size.
Things 1nf to 1uf film. Most of those are plenty high voltage for us, but watch the size on the larger ones.
less than 1nf ceramic disc.
I have never bought a multi whatever ceramic.
I fooled with tantalum because "tube screamers have them." I have no use for them lately. And they, like electro are polarized and can pop with reverse voltage....       

[anotherjim]

As for C20 @60pF, it doesn't help that the build doc has a page split in that area, but it looks like it is for HF stability for an opamp and has no role in the audio range. So 47p, 68p or 100p would all do fine.

[antonis]

What Jim said..
(235kHz cut-off frequency could easily become 220kHz for 56pF or 266kHz for 68pF with absolutely no issue..)



P.S.
Never realized the purpose of odd/weird value items use in modern design circuits in places other than extreme presicion needed..