[RFI] Portable DFing at HF - Thompson Loop

[Kenneth G. Gordon]

I built one of Tom's copper-tubing loops about a year ago. It took me all of an hour, at most. 
Works beautifully. I very highly recommend it. I call it a "Link-Coupled Loop". Tuning is VERY 
sharp, and the nulls are very sharp too.

Ken W7EKB