[R-390] Replacement caps for HP200CD

[JM/CO]

Just replace them with .47 / 400V units and be done with it. Given the
ACTUAL capacitance of the two types ( new Vs old ),  as well as the standard
tolerance for these types of capacitors, which is 20%, the chances of either
being exactly as marked is practically nil. Also, there are no  circuits in
the 200-CD that are that critical as to cap. values. Leakage, as is probable
in the old "black" units, is the real culprit that you need to address.
Chuck N1LNH
-----Original Message-----
From: Scott, Barry (Clyde B) <cbscott@ingr.com>
To: R390 (E-mail) <R-390@mailman.qth.net>
Date: Monday, September 16, 2002 2:49 PM
Subject: [R-390] Replacement caps for HP200CD


>The HP200CD I have has two "Black Cat" caps I'm going to replace.  They are
0.5ufd @ 400VDC.  I know the standard today is 0.47ufd, but would I be
better off sticking to the original value by using two 1ufd in series?  If I
do, is it acceptable to use 200VDC caps?  Is there any adverse effect from
doing this?
>
>I know that caps in parallel add to the total capacitance, but each cap in
this case will tend to act independently at different frequencies.  I don't
think this is the case with series caps, but I'm not sure.
>
>Thanks,
>
>Barry - N4BUQ
>
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