[Ham-Mac] RFI getting into computer

Tod Glenn n7jqw at cordite.com
Mon Jun 5 16:07:43 EDT 2006


On Jun 5, 2006, at 1:40 PM, Richard Hemingway wrote:

> Hi Group,
>
> I am wondering if the plastic casing of iMacs is more susceptible  
> to RFI from the antenna than is a computer with a metal case.   
> However, I should explain this.  I am in a r etirement apartment  
> and have my antenna sitting on top of a bookcase about 10 feet  
> away.  I am using a G5 with a metal case, but the monitor has a  
> plastic casing. If I don't  have the display angled properly RFI  
> will cause the computer of turn off and on.  I also have a Toshiba  
> laptop computer and RFI never bothers it at all. (I should say that  
> I only use about 30 watts with PSK).  I have disconnected the  
> display from the computer and FRI doesn't bother it then.
>
> The problem is that I am thinking of buying an iMac Inter Dual Core  
> computer.  The casing is all plastic and I am wondering if the  
> problem would persist.  The PowerBook has a metal case (I think)  
> and I don't imagine would have t his problem.  However, I would  
> much rather have the iMac.  Before you all jump in and say so - yes  
> I have filter and chokes all over the place and on all the cables.
>
> I ma not experiencing it as much with the new Icom 756 PPRO3 I now  
> have as I did with the Orion.
>
> Thanks,


The plastic cases are sprayed with anti-RFI paint per FCC.
----
Tod Glenn
N7JQW
SKCC #1444
ARCI #12420
FISTS #12134
NAQCC #1283

n7jqw at cordite.com






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