aluminum electrolytic non Polarized cap on AMZ mini booster

[whitewave]

I' going to build this pedal, but I can't find C3, the 3.3 uF electrolytic NP cap here in Europe.
Someone suggested me to use a MKS 2 cap type.  Is it correct?

What could I use to substitute it?

Thanks.

[Cabezahead]

I used two regular electrolytics to make an NP cap to build mine.  Wire the positive lead to the negative lead of the other and the negative to the positve...  Then drop that 'new' cap into the NP cap's spot.

Viola!

It worked for mine, at least... :-)

-CH

[whitewave]

:shock:

which values?

[dv8]

Just follow the tips in Aron's FAQ page (DIY FAQ at the top of the page).  I think I used 4.7 uF and 10 uF in series, connect the negatives to each other.  

I think Jack Orman said he just used a cap he had on hand, anything close should work.

[amz-fx]

Use a 1uF electrolytic if that is what you have on hand.  Put the plus side of the cap to the drain of the lower jfet.

regards, Jack

[amz-fx]

You could also substitute a 1uF metal film capacitor, which is not polarized, such as the Mouser part #1430-1105 or Digikey P4675-ND.

[whitewave]

Use a 1uF electrolytic if that is what you have on hand.  Put the plus side of the cap to the drain of the lower jfet.

regards, Jack

Yes, I have it on hand.  But since I'm ordering parts I could get something better.  For example I can follow Cabezahead suggestion using 2x 1uF polarized cap in parallalel, or follow the other suggestion.
Tell me which is the best choice please.

Thanks a lot.

[whitewave]

I found this post searching in this forum:

"Caps on the other hand are the other way around. If you put them in parallel the capacitance adds, C1+C2, but in series they divide.

So, to get a 1uF, you need 2 * 2uF's in series: C1C2/(C1+C2) = 2*2/2+2 = 1uF " author is "travissk"

So if a connect 2 electrolitic caps negative-to-negative and positive-to-positive is in series and so I could use 2x 4.7 uF electrolytic caps.

4.7*4.7 / (4.7+4.7) =  22.09 / 9.4 =  2.35 uF.

Is it right?  Is it a good solution?

Thanks.

[amz-fx]

So if a connect 2 electrolitic caps negative-to-negative and positive-to-positive is in series and so I could use 2x 4.7 uF electrolytic caps.

4.7*4.7 / (4.7+4.7) = 22.09 / 9.4 = 2.35 uF.

Is it right? Is it a good solution?

That will work for you. 2 x 4.7 connected pos to pos in series....  or just use one 4.7uF electrolytic with the plus side to the drain of the lower jfet.  It will work just fine either way.

-Jack