I just came back from Ratty Shack with this capacitor. There is no mention in the description that this is nonpolar/bi-polar, but there is no indication as to a +/- side. Before I go through the hassle of mail ordering something, is this really non-polar? I bought two for $1.60 each, so I want my money back if it's not right!
Ideally I'm looking for a 2.2 uF which is polarized. At least I think that's what I'm looking for. The source of the circuit mentioned possibly substituting metal film 1 uF, and Radio Shack had a pretty poor selection. The only 2.2 was nonpolar. In addition, some (not all) of the pictures of this circuit show a big rectangular thing, nothing like any of the capacitors in the store.