[Ham-Mac] ethernet hash

[Jack Brindle]

Direct connection between the two (cross-over cable?) or is there a  
switch/hub involved. The latter tend to be very noisy.

Jack Brindle, W6FB

On Feb 2, 2010, at 4:09 PM, EZ Rhino wrote:

> John,
>
> I don't need to turn off the computer, only unplug the ethernet  
> cable from it.
>
> Chris
>
>
> On Feb 2, 2010, at 17:02 , John L Merrill wrote:
>
> If you turn the Mac and PC off does it go away? I think I have a  
> similar
> situation here.
>
> John N1JM
>
> On 2/2/2010 4:44 PM, EZ Rhino wrote:
>> Guys-
>>
>> Wondering if any of you have dealt with ethernet noise showing up  
>> all over the RF spectrum for your iMacs?  I recently got fast(er)  
>> internet at home and now I get a very loud spike (sounds like a CW  
>> carrier) every 50khz or so from 20m to 2m.  It's aweful.     
>> Specifically, the internet is from an access point to my home via a  
>> dish on the roof, then cat 5 from the dish to my 24" iMac.
>>
>> Today I tried cabling the internet/cat 5 to an Apple Airport  
>> Extreme wireless router, and then let my iMac pick up the signal  
>> wirelessly.  It didn't kill the noise.  I even replaced the cat 5  
>> they installed with shielded cable to no avail.  Wrapping the cat 5  
>> around toroids begins to reduce the RFI a bit.
>>
>> If I connect two computers--Apple or PC--together with cat 5 in the  
>> shack, I get the noise.  If I connect two computers together on the  
>> opposite side of the house I can't hear the noise in the shack.  So  
>> it seems to be a proximity thing.
>>
>> At this point I'm facing moving the dish to the opposite end of the  
>> house which I don't want to do, thought I'd see if anyone here has  
>> similar problems.  There are several posts on QRZ.com/eHam.net  
>> forums with similar complaints.
>>
>> Chris
>> KF7P
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