[RFI] Shielded vs unshielded loops.

[David Robbins]

Forget hour, 5 minutes, most of that waiting for a soldering iron to heat,
is about it.  2 or 3 turns of solid wire about 1' in diameter soldered to
maybe 10' of coax and taped to scrap of 1x2 a couple feet long is all you
need to get started.  Not good for long distance, but gives good nulls.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net


-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Tom Thompson
Sent: Friday, March 28, 2014 00:21
To: Ken Gordon; Rfi at contesting.com
Subject: Re: [RFI] Shielded vs unshielded loops.

Ken,

You do not need a shielded loop.  You can build a loop in a few hours.  
See:  http://tomthompson.com/radio/RecievingLoop/loop.html I can track down
an RFI source verry easily.  The RFI is vertically polarized so the null is
looking through the loop.

Tom   W0IVJ

On 3/27/2014 5:59 PM, Kenneth G. Gordon wrote:
> OK. So, what are the disadvantages of using an unshielded loop in our 
> quest to determine the direction to noise sources at HF?
>
> I am slowly going crazy trying to find this crap...and it appears to 
> be getting slowly worse...
>
> Ken W7EKB
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