[ICOM] IC-2KL / PS question.

[D C Macdonald]

Most electrolytic caps have a capacitance tolerance
of between -10% or 20% to +100%.  I wouldn't
worry too much about an increase in nominal value
of just a bit over 30%.

Mac, K2GKK/5



----Original Message Follows----
From: "Michael P. Olbrisch" <mike2004 at elp.rr.com>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: "_ICOM_list (E-mail)" <icom at mailman.qth.net>
Subject: [ICOM] IC-2KL / PS question.
Date: Wed, 13 Oct 2004 23:11:20 -0000


Fellow ICOMers, I have a question.

The main capacitor of my IC-2KL / PS is showing signs of decay.  It is
47,000 uf at 63 VDC, 85 deg C, 2-1/2 x 4-1/8 inches.

ICOM no longer has that item.  An internet search shows a number of
capacitors listed that will work.  Unfortunately, there is always a snag.
Minimum order of $250, or currently out of stock, or none anywhere, minimum
quantity of 10 needed to produce.

I have found a supplier who went way out of their way to look for me.  All
they came up with was 64,000 uf at 63 VDC, 85 deg C, 2-1/2 x 4-1/8 inches.

I was worried that the much larger cap value might cause problems with the
inrush current.  In looking at the PS schematic, It has a soft-start
function consisting of two resistors and a relay.  I think it will handle
the cap just fine.  However, there is a ton of wisdom on this list and I
wanted to see if I am missing something.

Input and constructive criticism welcome.

GARY ???  <grin>

Once in it, I do intend to replace ALL the electrolytics.  I have of can get
the others easily.

Thanks Y-all.

Mike.  KD9KC

My E-mail address: mike2004 at elp dot rr dot com
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U.S. Army Retired.

Freedom is expensive.  Those who are not willing to
pay the price ultimately lose everything.




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