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[Amps] SB 221 filter capacitor replacement

To: <amps@contesting.com>
Subject: [Amps] SB 221 filter capacitor replacement
From: "Barry Norman" <bnorman@carolina.rr.com>
Date: Sun, 20 Feb 2005 16:28:56 -0500
List-post: <mailto:amps@contesting.com>
Hello all,

It's finally time for me to replace the original filter caps in my SB221. A
few questions:

1) Total capacitance with stock caps are 25uF (8 200uF in series), should I
increase capacitance to minimize voltage drop under load?

2) Are the 105C rated caps worth the extra few bucks over the 85C?

3) Are the different series choices only a reflection of the temp ratings or
are there other differences as well?

Note: I've already replaced stock equalizing resistors with 100Ks. Also
using a Peter Dahl replacement HV transformer.

Thanks for your suggestions,

Barry Norman KF4WGR


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