Re: RFI resistant Monitor

Posted by Jim Brown-10 on Apr 11, 2016; 4:40pm
URL: http://elecraft.85.s1.nabble.com/RFI-resistant-Monitor-tp7616198p7616218.html

You'll find exactly these suggestions in the tutorial at the link I posted.

73, Jim K9YC

On Mon,4/11/2016 6:29 AM, Myron Schaffer wrote:

>
> One thing I have noticed over the years is that the near-field noise
> is present with most any modern electronics. The switching frequency
> is between 200-300kHz and can be easily sniffed with a pocket AM radio
> (harmonics of that fundamental switching frequency are easily spotted
> with an AM radio). When I bring my CCrane Pocket Radio in the near
> field at the operating position, I can’t tune in the semi-local 600
> KCOL out of Greely, CO. If I back up a few feet the noise level drops
> considerably and the station is audible again. The CC Pocket Radio has
> a fairly good front end with somewhat good selectivity but is still
> overloaded with IBOC noise.
>
> I have battery chargers, an old Dell 1501 laptop, an external HD with
> switcher, the list goes on. Common mode noise and strong near-field
> noise is the bane of my ham radio existence in this RFI rich environment.
>

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