[RFI] Fire wire? Oops, poor typing

[Roger (K8RI)]

That should have said a wire in the RX connector

73, Roger (K8RI)

On 5/30/2017 Tuesday 6:20 AM, Roger (K8RI) wrote:
> I know this sounds trite, but get a good computer.  I'm running two 
> monsters in full size, steel tower cases within 3 feet of the rigs, 
> USB cables and standard serial cables (com1 and com 2). I have no 
> interference and no chokes on any of the lines.  The 75/40 sloping 
> dipole is about 60 feet from the computers.  O
> Desktop computers (PCs) typically use plastic cabinets and inexpensive 
> power supplies. The same goes for network interface cards.
>
> It's often not just the cables that radiate, but the computer itself 
> with the plastic cabinet makes for no attenuation to signals from 
> inside the computer.
> Jim Brown (K9YC) has an excellent page on grounding and choking, but 
> with plastic cases...who knows.
>
> Antennas are 60 feet of more distant, but a fire in the RX coax 
> connector doesn't hear the computers either.
>
> 73, Roger (K8RI)
>
> On 5/29/2017 Monday 1:21 PM, JW via RFI wrote:
>> Ken,
>>
>> Kinda more or less known; different screen refresh and or resolutions 
>> have been known to "shift" those frequencies too. If a fave freq is 
>> blocked by a birdie, try making a change in the above mentioned 
>> parameters.
>>
>> Jim WB5WPA
>>
>>
>>        From: Kenneth G. Gordon <kgordon2006 at frontier.com>
>>   To: RFI at contesting.com
>>   Sent: Monday, May 29, 2017 12:07 PM
>>   Subject: [RFI] A source of RFI
>>     Hmmm...well, yesterday, I found that a source of RFI on (at 
>> least) 40 meters is the desktop
>> computer sitting on my operating bench. RFI changes with changes in 
>> the "scene" on the
>> screen.
>>
>> Turning off the 'pooter resulted in noise level dropping to S-1 
>> (transceiver in narrow CW) on
>> selected frequencies.
>>
>> I'm not sure at this point how to fix this, but I'll be working on it.
>>
>> What brought it to my attention was a weak but steady carrier on 
>> 7053, which would
>> disappear when I changed to a different piece of software on the 
>> 'pooter.
>>
>> Sigh.... :-(
>>
>> If it isn't one thing, its another.
>>
>> Ken W7EKB
>>
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>
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