[ICOM] Internal PS question

[Mike Olbrisch]

Good morning Steve and others.

I have three of those internal power supplies.  They are switchers, running
about 20 KHz IIRC.  The first one is inside the IC-PS30 case.  The second is
in like-new condition and ready to replace the first when it dies.  The
third is in need of rebuild, it quit and was replaced by the first.  I have
the parts, I currently lack the time.

I have found them to run fairly cool under load, and I cannot say I have
ever heard any noise I could attribute to those supplies.

When I have had them fail, I usually just re-cap them and they seem fine.

I had a fully-loaded IC-740 several years ago.  When I tried to sell it
as-is I got offers of like $300 on it.  So I stripped it out, sold the bare
radio for $300, sold the filters and other accessories for another $400 or
so.  I think I still have the keyer board around here somewhere, no one
seemed to want it at the time.  So I tossed it in a box of junk up in the
storage loft above the garage.  I kept the internal supply as a spare for
the PS-30, same guts.

Anyway - those supplies are pretty good in my book.

Vy73 - Mike - KD9KC.
El Paso, Texas - DM61rt.
W5-SOTA Association Manager.
W5-SOTA info: www.qsl.net/kd9kc/




-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of Steve
Sent: Tuesday, March 06, 2012 23:04
To: ICOM Reflector
Subject: Re: [ICOM] Internal PS question

I was merely inquiring if they really used switching 
type supplies knowing how bad they can be for noise.