"Mike Williams" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Not to mention the PS-7 looks good!
----- Original Message -----
From: "Gerry" <[EMAIL PROTECTED]>
To: "'Jim DiMauro'" <[EMAIL PROTECTED]>; "'David Drake'"
<[EMAIL PROTECTED]>; <drakelist@www.zerobeat.net>
Sent: Monday, March 12, 2007 4:48 PM
Subject: RE: [drakelist] Power Supply for TR-7(a)
"Gerry" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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By their very nature, switching power supplies create both radiated and
conducted emissions. How much noise they produce is largely a function of
the topology used and the design of the enclosure and filtering. You can
find some pretty good ones to use for communications gear just as it is
possible to get a real bad one. The safest thing to do is go with an
analog
power supply for all communications gear or a switching supply of known
quality and origin. Modern switching supplies can cost less, generate less
heat due to higher efficiency, and weigh considerably less than old
fashioned analog ones. I now use a PS-7 with my TR-7. Before that I used a
40 amp switcher that didn't emit any noise within the Ham bands but was
useless for SWL'ing.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jim DiMauro
Sent: Monday, March 12, 2007 2:54 PM
To: David Drake; drakelist@www.zerobeat.net
Subject: Re: [drakelist] Power Supply for TR-7(a)
Jim DiMauro <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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I've used a switcher with my TR-7 for as long as I've
owned it (about three years) and I've never had either
a noise or performance problem. I can't imagine why
it wouldn't be recommended. I'd also like to hear the
details as to why a switching supply might not be
recommended for the TR-7 if anyone can provide them.
FWIW, my supply is an Astron RS-30M.
Jim
W2BVM
--- David Drake <[EMAIL PROTECTED]> wrote:
Hi all,
I'm interested in hearing the pro's and con's
regarding using a switching power supply with a
TR-7(a). I remember this question coming up on the
Sunday PM technical net some time ago, but forgot
the details.
As I recall, it is not recommended, but don't
remember why.
Thanks
David
Wd9cmd
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