[Amps] Sensible filter Cap sizing

[Paul Decker]

Hi Gang,

I've had a couple comments about 5x500V not being enough for 2488V and that I should use 6 or 7 caps.  When I was first building my ps, I was thinking along the same lines, and if I had 6 or 7, I likely would have put them in just for good measure.  On the other hand I also rationalized it by thinking those capicator designers have already put in a safety margin to meet their MTBF stats, and I know that my p-p best case is 2488, even exceeding 2248 it woudln't be a normal or prolonged use case, so why should I add yet another safety margin to the system.   So far, so good.  I guess I could replace them with the 8 3900uf 450V caps I got for free the other day.

73, 
Paul, kg7hf





----- Original Message -----
From: Paul Decker <kg7hf at comcast.net>
To: amps at contesting.com
Sent: Wed, 23 May 2012 23:46:14 -0000 (UTC)
Subject: Re: Sensible filter Cap sizing (Leigh Turner)


I've been following the filter cap thread a bit just because I  guess.

For right or wrong, the PS I built last year has 5 x 500V 490uF caps that seems to be fine for my 2488 no load 3cx800 ps.  There was one reason I chose to use those caps, I got them for free as samples along with all the rectifier diodes.

Paul, kg7hf