Re: {Collins} Colllins 516F-2 Question

C1 and L1 comprise a resonant filter for the power supply.  Do not use a
disc ceramic here.  The orange drops or other film or metal film caps should
be used, and 1600 volts (or higher) is a good rating.  Since this is a
resonant filter, you should confirm that the cap you install is at or near
the resonant point.  If it is not, the B+ supply will be too high and can
possibly damage other components in the transmitter or transceiver connected
to the supply.  I've seen 516F-2's that resonated fine at .047 or .05 uFd,
but some that didn't.  Just make sure the B+ output is in an acceptable


-----Original Message-----
From: Collins [] On
Behalf Of Steve via Collins
Sent: Friday, August 09, 2019 7:11 PM
To: Collins Reflector(CCA); Peter Wittenberg Sr
Subject: Re: {Collins} Colllins 516F-2 Question

Pete, Dick & the CCA,

    I see that a company called Just Radios online has .05uf tubular axial
Caps available at 1600VDC.  I also assume non-polarized.  I could also
a .047uf Disc Ceramic at 1600VDC as well.  Is there a preference toward
capacitor in the 516F-2 power supply?

    Steve  K2FW


----- Original Message -----
From: Peter Wittenberg Sr <K2LRC@xxxxxxxxx>
To: Steve <k2fw@xxxxxxxx>
Sent: 8/9/2019 4:05:00 PM
Subject: Re: {Collins} Colllins 516F-2 Question

Tuning cap for the choke to control the ripple in the supply voltage.
any of the old ones since they short to the case and the choke is gone..caps

are available on line.

-73- Peter K2LRC
916-663-9744 shop
443-994-1438 cell

Sent from my iPad

On Aug 9, 2019, at 10:22, Steve via Collins <collins@xxxxxxxxxxxxx> wrote:

Hello to the very fine CCA Group

I have a question in regards to Capacitor C1 in the 516F-2 Power Supply.
What exactly is the purpose of this capacitor?  Is this a capacitor that
be replaced if is still the original part?  And is it necessary for this 
capacitor to be polarized?

Tks everyone!

Steve  K2FW
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