Topband: RDF

[Steve Flood]

>IV3PRK wrote:
>Very interesting question Dave...I was just wondering why I never saw any comments on this "new" receiving >antenna design.  It has been published by KB7GF on QST Oct.2012 and on QEX Sept/Oct. 2012.
>It's quite different from the usual small loop types, flags,pennants, K9AY, etc...
>But contrary to these resistor loaded loops, which always want to work, this Shared Apex Loop looks like critical >and not so easy to build!

A fairly similar design, although quite a bit larger dimension, appeared about 10-12 years ago on the hardcoredx website.  It was 6 triangle loops arranged on a mast.  Each loop 30 feet tall and 20 feet wide at the base, fed 60% from the outer loop corners with 75 ohm coax through a binocular core transformer.  The six feedlines were routed to a phasing control box at the base of the mast.   I tried to build it in Oct. 2002 but could never get the phasing control to work properly (I still have my notes).  I scrapped the project and built the 8-direction K9AY instead.  I am thinking of trying it out again next summer using the KB7GF control circuit.

Steve KK7UV