Hi.
FWIW, Rapid electronics in the UK do some 4u7 non-polar caps. Not too
expensive either... ;-)
http://www.rapidonline.com
stock no; 10-5782 or stock no; 10-4110
hope this helps....
cheers,
Dave
FWIW, Rapid electronics in the UK do some 4u7 non-polar caps. Not too
expensive either... ;-)
http://www.rapidonline.com
stock no; 10-5782 or stock no; 10-4110
hope this helps....
cheers,
Dave
On Jan 11, 2010, at 23:35, Doug wrote:
> Amateurs are most welcome. ;-)
>
> I will probably be adding one or more of Harry's LAGs to my
> SteamSynth project very soon.
>
> I looked over the circuit and realized that 4.7uf (4M7???) is a VERY
> large mylar cap. I doubt it is easily available, if at all. This MUST
> be a non-polarized cap. The Tant cap is VERY polarized so do NOT use
> it.
>
> Now I have no direct experience with this circuit, but I see that it
> is in a closed loop feedback circuit, I would suggest that the 4M7
> (4.7uf) cap would most easily be replaced with two 10uf caps in
> series, but wired "back-to-back" - meaning the two positives are wired
> together and then the negative leads inserted where the plans call for
> the cap. Does that make sense? I hope so.
>
> Doug
>
> --- In cgs_synth@yahoogroups.com, "Guy" <guy@...> wrote:
> >
> >
> > Here's the amateur of the group (the one with the now-fixed LFO)...
> > Tantaliums are indeed polarized. Long lead is +. I don't think you
> can replace a mylar with a tant.
> > Don't tell Ken tho, he dislikes tantaliums. ;-)
> >
> > _g
> >
> >
> > --- In cgs_synth@yahoogroups.com, "dumpstatic" <oozitron@> wrote:
> > >
> > > I can't find my docs for the Lag PCBs I have, but I have Harry's
> circuit diagram for help. I powered it up last night and it did some
> really strange stuff. Looking at the backside, I realized there should
> be some decoupling caps on the back... oops...
> > >
> > > Question #1 - would the absence of those 4 decoupling caps cause
> the 10uF electrolytic caps to get quite hot?
> > >
> > > Question #2 - I have a 4.7uF Tant cap where a mylar is suggested.
> Are Tant caps polarized? (one lead is longer than the other, but there
> are no +/- labels) Should a Tant cap work OK here?
> > >
> > > thanks a bunch for any help,
> > > Drew
> > >
> >
>
>
>