Thanks, David.

This is additional good food for thought.

Tom Behler: KB8TYJ

----- Original Message ----- 
From: "David W Wood" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, November 15, 2013 9:40 AM
Subject: Re: Anoying Interference Issue


> Hi Tom
>
> Screens are a frequent source of interference.
> Having had a similar issue here, I turned off my router and ADSL box as 
> well
> as all the PC's in the house.
> Turned on my shack screen, low and behold, a birdie flew in!
> Having put clamp-on ferrites at both ends of the power cable and VGA 
> cable,
> the problem resolved.
> As mentioned elsewhere, keyboards can give similar issues.
> Again, I have used ferrite to good effect as I have never had much success
> with wireless keyboards.
>
> Fortunately the ADSL modem and router don't give any issues.  This is
> fortunate as I have a 16 port network in the house, and sorting out RFI on
> this would be a nightmare.  Maybe having used CAT5E has had the desired
> effect.
>
> 73
>
> ATB
>
> David W Wood
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Tom Behler
> Sent: Friday, November 15, 2013 1:30 PM
> To: [log in to unmask]
> Subject: Anoying Interference Issue
>
> Hi, all.
>
> As I think many of you know, I am currently in the process of switching to 
> a
>
> Windows 7 PC as my main home computer.  I will be using the PC for both
> professional and personal purposes here in my home office.
>
> My home office is also where I have my ham station set up, which does have
> its advantages if I need to take a little break and check out the bands
> every once in a while.  (grin)
>
> Anyway, I have just noticed that when this new computer is running, it
> places all sorts of little birdies across the HF bands, particularly the
> higher HF bands like 10 and 15 meters.
>
> To me, this obviously means that the computer has a very poorly-designed
> switching power supply.
>
> My question is what might I be able to do to minimize this interference?
>
> I have thought of switching the computer to another circuit in the house,
> but that would involve running an extension cord into another room, which
> could be a bit of a pain.
>
> If there is a fortunate side to this dilemma, it is that I am not going to
> be using the PC for ham radio applications such as logging, rig control, 
> and
>
> the like.  Those functions are done via a separate Windows XP laptop that 
> I
> have on my ham radio operating desk.
>
> Of course, the obvious low tech solution to this issue would simply be to
> turn off the main PC whenever I am operating on the HF bands, and I may 
> have
>
> to resort to that for now.
>
> If, though, there is something else I might want to try, please let me 
> know.
>
> Tom Behler: KB8TYJ
>