[Boatanchors] Collins 516F2 Power Supply Capacitor

[Mark K3MSB]

Thanks everyone!   I suspected it wasn't an electrolytic but wanted to
check.

I recall reading in an old ARRL Handbook about using a shunt cap across a
smoothing choke to "tune" the choke's performance at a particular
frequency.   Is this the function of C1?    That came to mind as the manual
comments about removing it if the line frequency is not 60 Hz.

73 Mark K3MSB

On Tue, Jun 2, 2015 at 2:41 PM, <manualman at juno.com> wrote:

> It's shown to be polarized on the schematic which in some cases doesn't
> necessarily mean its an electrolytic capacitor. I believe it has
> something to do with how the foil wrapping layers are positioned in the
> construction of the capacitor. If you can recall from rigs back in the
> "good old days" lots of waxed paper capacitors had a black band at one
> end to indicate polarity. In this application, a conventional .05 mfd cap
> at appropriate voltage rating would be fine.
>
> Pete, wa2cwa
>
> > In a message dated 06/02/2015 12:26:16 PM Central Daylight Time,
> > mark.k3msb at gmail.com writes:
> > > I was contacted by a friend that is recapping his 516F2 power
> > supply.
> > >
> > > In the schematic, part C1 is shown to be an electrolytic, yet the
> > parts
> > > list shows it to be a non-electrolytic:
> > >
> > > Collins part number CP29A1EG503K
> > >
> > > Capacitor, FXD, PPR DIEL, 0.05 uF, 10% 1000V
> > >
> > > The other caps in the HV string, C2 through C4, are clearly stated
> > to be
> > > electrolytic in the parts list.
> > >
> > > Is C1 really an electrolytic?
> > >
> > > Thanks
> > >
> > > Mark K3MSB
>
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