Re: (ET) capacitors

[Michael S Briggs <msbriggs alberti unh edu>]

On Thu, 27 Jul 2006, Bob Murcek wrote:

> I know that's starting to get off-topic, but the point is that in many 
> applications the exact value of a cap is important, and more isn't 
> better.

I'm quite familiar with tuning circuits, and the need for the capacitor to 
be a particular capacitance - it just wasn't clear from the archives 
whether the capacitance is 4 uF or 10uF, and I've never heard of "run 
capacitors" vs. "starting capacitors" before, so wasn't sure what the 
difference is.

Mike

> > > > Michael S Briggs <msbriggs alberti unh edu> 7/27/2006 4:23:46 PM >>>
>
>
>
> On Thu, 27 Jul 2006, RJ Kanary wrote:
>
> >      And one more note. It HAS to be a motor 'run' capacitor, not a motor
> > 'start' capacitor. Starting capacitors are NOT rated for a continuous duty
> > cycle.Bad things will happens if you are brave enough to prove it to
> > yourself.     :(
>
> I'm not familiar with what a "motor run" capacitor is, vs. a "motor start"
> capacitor. I know what electrolytic, tantulum, etc. capacitors are, but
> have never heard of "motor start" or run.
>
> Mike
>
> > ----- Original Message -----
> > From: "Tom Coate" <tcoate coate org>
> > To: <elec-trak cosmos phy tufts edu>
> > Sent: Thursday, July 27, 2006 10:55 AM
> > Subject: Re: (ET) capacitors
> >
> >
> > > IIRC, Bill Gunn once told me that GE used two different transformers in
> > > the chargers somewhat arbitrarily.  One requires a 4 uf, the other,
> > > something different.  When I got caps from him he had me check the size
> > > of the existing cap to be sure it was replaced with the same size.  I'm
> > > at work, so I can't look at one now, but I believe the size of the cap
> > > is stamped into the case.
> > >
> > > - Tom Coate
> > >
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