Just ran across this article on direction finding antennas.  Some vbersions look easy to build and would be good for the Ocon Oscillator Hunt. The Snoop Loop abt halfway down the page looks very good for our purposes.
http://www.ce5prd.cl/documentos/antenna_handbook/14.pdf

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72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com