Re: {Collins} 516F-F2 AC By Pass Caps

Today, it is good design practice to use AC line-rated capacitors  to bypass
the AC to ground. Do NOT use ordinary 500V or 1000V disc caps.  I buy my
capacitors from Mouser Electronics ( and use Vishay
Cera-Mite, 250V AC line-rated ceramic caps, Mouser p/n 75-125LS10-R. They
are very inexpensive.
Jim W8ZR

> -----Original Message-----
> Jerry Stern
> Sent: Saturday, February 06, 2010 10:11 AM
> To: 'Collins CCA Reflector'
> Subject: {Collins} 516F-F2 AC By Pass Caps
> I don't see any SB for this but in my 1968 516F-2 manual there are no
> by-pass caps from AC mains to ground but I note these (0.1uF, 1kV) are
> shown in the 1974 manual.  Makes sense to have them but why no SB
> calling for updates to all 516F-2?  I had to change the power cord on
> one of my older 516F-2 and could not find any  1kV ceramics in the junk
> box only 500V.  I would think that any spikes or RF noise on the power
> lines would not exceed 500V peak?  Any reason to wait until I buy some
> 1kV ceramics instead of going with the 500V?
> 73 Jerry

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