[VHFcontesting] Stacking DEM Loopers

Bill Olson callbill at hotmail.com
Sun Jul 11 20:36:21 EDT 2004


John, When you view the 2 antennas from the rear (let's say...) Both center 
conductors of the feed coax should go in the same direction - either both 
right or both left. If one antenna is "flipped" and they are identical there 
will be a phase cancellation. With the looper, you need to rotate the driven 
element loop in the boom 180 degrees. This is best done by unsoldering the 
connections (center conductor and and shield and spinning the loop ( loosen 
the nut first...) then resoldering.. You can do it with a nice hot iron in 
about 10 seconds if you have done 356,000 of them like i have..

What you want is driven elements that are mirror images of each other.. This 
is trickier with the K1FO Yagi and you're probably best off mounting them 
both "rightside up". Running the coax around the boom won't hurt anything - 
you most likely are doing it at the mast anyway..

bill, K1DY




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