On Fri, 2008-01-11 at 13:20 -0500, N2TK wrote:
> I have had good luck replacing RF noisy PC power supplies with PC Power &
> Cooling Supplies. They seem to be well filtered.
> http://www.pcpower.com/index.html
I've had fairly good luck with Antec power supplies when dealing with my
other electron
John Klewer wrote:
>
> I dismantled the computer, opened up the power supply and replaced the
> power supply input connector (unfiltered) with a filtered one purchased
> from Digi-key and the problem went away! Sorry, but I do not have the
> part number...they are available from Digi-key, Mo
On Fri, Jan 11, 2008 at 10:32:50AM -0800 I heard the voice of
Phil Kane, and lo! it spake thus:
> On Fri, 11 Jan 2008 13:20:39 -0500, N2TK wrote:
>
> >I have had good luck replacing RF noisy PC power supplies with PC
> >Power & Cooling Supplies. They seem to be well filtered.
>
> I use them in
Yup. Lower wattage supply uses smaller componets which allows the inclusion of
filter components (presumably due to more room in chassis space and components
budget). It's a hypothetical model, as I've never taken one of these "big
boys" apart, but I've seen going to a lower-power supply fix thi
-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bill W5WVO
Sent: Friday, January 11, 2008 11:58 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Computer Noise ruining 20 & 30m
One thing to be aware of -- and I too have had quite a bit of
undesired experience in this
Prior to buying my (ultra-quiet) Mac G5, I experienced a significant
amount of noise from my PCdoing a search with a handheld shortwave
radio in AM mode revealed it was primarily emanating from the AC power
cable area.
Clip-on ferrite chokes on the power cable were completely ineffective.
Summary:
Based on the answers received and spending all morning reading on the
WEB it appears PC Power and Cooling, Startec and Antec at least at the
higher end have good computer power supplies. One amateur had good
success curing his problem with a Startech ATX POW450Pro, two reported
good
On Fri, 11 Jan 2008 13:20:39 -0500, N2TK wrote:
>I have had good luck replacing RF noisy PC power supplies with PC Power &
>Cooling Supplies. They seem to be well filtered.
I use them in all three computers in the house. No noise
problems.
--
73 de K2ASP - Phil Kane
Elecraft K2/100
213, RG-8X
and RG-58 in the shack.
N2TK, Tony
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bill W5WVO
Sent: Friday, January 11, 2008 11:58 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Computer Noise ruining 20 & 30m
One thing to be awa
On Fri, 11 Jan 2008 10:03:27 -0500, W3DVX wrote:
>Hello,
>I gave away the feeble old PC I had by my radio equipment and replaced
>it with a newer one ...
>
>Now I have S9+ noise wiping out 20 and 30 meters.
>
>Using same keyboard, mouse, monitor; just the PC in a new case.
>Evidently it has a
>n
One thing to be aware of -- and I too have had quite a bit of undesired
experience in this area -- hash from switching power supplies in computers is
typically common mode noise, not differential noise. Consequently, a
differential line filter often won't knock it down very much, if at all. What
SOLVED!
Just replaced the 400w supply with a 300w that I had in the junk box.
Both foreign cheap
units, but that's all the local PC shops seem to carry (at least at my
QTH). The replacement
is nicely quiet ... and a lot easier fix than what I was dreading!
Now that I can hear the radio properl
Alan D. Wilcox wrote:
>
> Hello,
> I gave away the feeble old PC I had by my radio equipment and replaced
> it with a newer one ...
>
> Now I have S9+ noise wiping out 20 and 30 meters.
>
> Using same keyboard, mouse, monitor; just the PC in a new case.
> Evidently it has a
> noisy switcher
I realize this is not a specific Elecraft topic but it is in response to
a request and it is on a radio subject. It would be interesting on
reports on what the K3 noise blankers do on this type of noise.
First of all I am no engineer but I have had some experience with this
problem.
I got t
All reports of fixing this I've seen are to replace the PSU - people go to
their local friendly PC shop and explain the problem and get a quiet PSU.
I haven't done this myself because I have a Mac - not saying they are
quieter, just I haven't had a problem.
On 11/1/08 15:03, "Alan D. Wilcox" <[E
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