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2010 ARRL June VHF Contest

06/23/2010 | W9ZRX

This year the xyl and I decided to stay home in EN60 because of the lousy economy.  So I decided to erect my 40-ft aluminum pipe mast and use a pair of Stacked PAR Loops.  This mast uses heavy wall tubing, and overlapping slip joints.  Sections are locked together with hitch pins.  It's study enough to be pulled up with a rope tied halfway up the mast.  I pulled it up using a pulley mounted on my home tower, a snatch block, and my garden tractor.

I expected to be tuning and working just the big signals.  I was surprised to be able to call CQ and hold a frequency for short periods.  My final totals were 487 Q's and 158 Grids.  Since my "mighty antenna farm" was so compact, I thought people might be interested in some pictures.

WB9LTY made the Mast and a matching tilt-up base.  This Base, and the Guys are anchored with 18" "Penetrators" - Helical Guy Anchors from American Earth Anchors (http://www.americanea.com/products.php?cat=7).  I found these through a post on one of the Contest Reflectors several years ago.  They can be screwed in with a 1" Box End Wrench, but last year I bought a 3/4" Electric Impact Wrench to save my torn Rotator Cuff.  Just hope you don't find any rocks!   

The OA-50 PAR Ominangle Loop Antenna (http://www.parelectronics.com/omnis.php) knocks down to a 3-ft by less than 4" x 4" volume.  They can be assembled in less than a minute with practice.  The Loops were mounted spaced approximately 11-ft and fed with a PAR Electronics Stacking Kit.  PAR claims a 3dB Gain for the stacked configuration. 

This is just for information - I have no involvement with American Earth Anchors or PAR Electronics. 

The Grid Square Map shows the results.  Signals from the close-in Grids were very weak.  I only worked 3 or 4 stations in Ohio – none in Illinois, Wisconsin, or Kentucky.  I doubt the antennas generated much of a Ground Wave.  Otherwise results were much better.

-- W9ZRX


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