Tom,
One other thought: I have 2 pc's in the shack and one of them puts a
small amount of noise on the bands. I found that grounding the case
of the pc to the station's ground solved it. Both computers are within
3 feet of the station ground, so it may not work for you if the work
area and work pc are across the room.
I just loosened one of the 4 screws holding the power supply in the pc
and slipped a piece of hook up wire under it and ran it to the ground lug.
73, Steve KW3A
On 11/15/2013 8:44 AM, Steve Forst wrote:
> Tom,
>
> I would probably try unplugging everything possible from the pc and see
> if the noise goes away. If you find the culprit, put ferrites on it.
>
> I had a keyboard that was causing problems and while ferrites killed 90
> percent of it, I went to a $20 wireless keyboard and never looked back.
>
> BTW, I saw your log was received at the PAQSO site. I'll give you a
> head's up when the preliminary scores are posted.
>
>
> 73, Steve KW3A
> On 11/15/2013 8:30 AM, Tom Behler wrote:
>> 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
>>
>>
>>
|