The 82n caps in delay circuits

Started by Denio, July 07, 2015, 04:59:49 AM

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Denio

Greetings cool people!
Glad to be part of this forum  :) !Really looking forward to learn new stuff 'bout pedals here!Anyway.
Here is my question:in many pt2399 circuits I can see those 0.082uf caps that go I think between pins 9-10 and 11-12.And for some this value appears to be tricky to find.So the question is are these circuits(things like the rebote delays 2 or 2.5 etc.) going to complain if I put in like say 100n or whatever is the next closest thing?
Thanks!

anotherjim

I'll answer by saying that I've never tried 82n. So far, I've found 100n satisfactory - also tried 47n and wasn't sure what that was doing. Since 100n is the data sheet application example value, I've stuck with that. Given the wide tolerance of cap values, one man's 82n could be another's 100n, or near enough as makes no difference.  I do tend to use NPO ceramics on the breadboard but fit poly-box film caps in working circuits and not noticed any change.

Then, the fact that I haven't noticed differences doesn't mean there are none. YMMV, as they say.

deadastronaut

yep,  100n's are fine...ive always used them..
https://www.youtube.com/user/100roberthenry
https://deadastronaut.wixsite.com/effects

chasm reverb/tremshifter/faze filter/abductor II delay/timestream reverb/dreamtime delay/skinwalker hi gain dist/black triangle OD/ nano drums/space patrol fuzz//

sajy_ho

Take a look at this thread:
http://www.diystompboxes.com/smfforum/index.php?topic=87543.0
In the pdf file, you'll see a note mentioning 100n as a more accurate value for those caps.
Life is too short for being regretful about it.

Denio

Big thanks guys!Stupidly i didn't mind to check the datasheet before posting this thread.