[Elecraft] Faraday Loop

Wed Jun 25 11:31:02 2003

Dave,

It isn't a dead short but the primary winding which magnetically couples with the bigger loop.  Since the small loop is also covered by a discontinuous shield it is electrically shielded but not magnetically shielded.  This helps with electrical noise.  

I have built test loops and have driven both with a faraday loop and a gamma match.  Both work fine.  The diameter of the small loop is supposed to be 1/5 the diameter of the larger one.  One author says just slightly smaller is better.  One author says flattening the loop along the bottom of the larger loop is better.  I would suggest you experiment with placement and shape to get the best results.  You can get a very good match. 

A good internet site for loop antennas is:

PA3COR Mag Loop Antenna Page
www.iri.tudelft.nl/~grurink/magnloop.htm

Chris Cowan KA0A/7

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