I don't know about laptops, but when it comes to desktop computers, Antec
power supplies and cases are RFI free. I have 2 17" crt's that have a lot of
birdies, but the Lcd/flat panel took care of that. That cheap pc power
supply I had would wipe out 40-160. It would be great to have all my
antennas 100-200 ft from the shack. But, no likely to happen.
Mike, K9MI
----- Original Message -----
From: "Jerry Flanders" <jeflanders@comcast.net>
To: "John Geiger" <n5ten@yahoo.com>; <dx-list@yahoogroups.com>;
<cq-contest@contesting.com>; <ft-100@yahoogroups.com>;
<icom@mailman.qth.net>; <yaesu@mailman.qth.net>; <yaesu@contesting.com>
Sent: Thursday, November 29, 2007 18:18
Subject: Re: [Yaesu] RF quiet computers
> Most computers and many monitors are noisy, John. Just use a well
> shielded transmission line from your station for the first 50 feet or
> so (with modern shielded rig, no unsealed antenna tuners in the
> shack, no ladder-line in the shack, etc) and the noise will be _very_ low.
>
> Jerry W4UK
>
> At 12:36 PM 11/29/2007, John Geiger wrote:
>>Recently, I discovered how RF noisy my fairly recent
>>ebay purchased laptop is (an Acer Pentium III). It
>>replaced a Micron Pentium 120mhz computer which was
>>very quiet on the radio, but also kind of slow, and I
>>thought a laptop would be nice in the shack because it
>>would mean less wires, etc.
>>
>>I find that it really raises the noise floor on 80,
>>somewhat on 40, and on parts of 20 and 15. It is
>>probably bad on other bands as well, but I really
>>haven't experimented with them yet.
>>
>>So I probably need to get a replacement, unless anyone
>>knows how to kill this noise. What are some good, RF
>>quiet computers to look at? I don't have alot of money
>>to spend, but can come up with a little bit. Speed
>>probably won't be that important, as long as I can use
>>it for some of the digital modes. The Micron
>>unfortunately died, or I would hook it back up.
>>
>>73s John AA5JG
>>
>>
>>
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