http://kl7uk.com/k9ay.jpg
This is an upscaled version in use at KL7UK KL 1X in Alaska - its been modified since so each loop is 2T but same loop dims, which has improved pd on 137 and 500, it uses a preamp at the shack end - nulls are still pretty good. I think a Moose has walked thru mine over the past month or so as levels are down - or the coax compromised. It is "nested" in a Birch forest but it still works.....
However, the back up eprobe, in a selected position, up a selected type of tree is within 1.5dB at 137 over the North Pole
Laurence
> Date: Sun, 13 May 2012 14:34:17 -0400
> From:
[email protected]> To:
[email protected]> Subject: Re: LF: Cardioid RX antenna for LF...
>
> Stefan,
>
> See Dallas Lankford's site:
> http://groups.yahoo.com/group/thedallasfiles/
>
> Yes F1AFJ used a K9AY with excellent results (until a local source of
> QRM appeared) Jean-Pierre even copied some T/A signals into daylight!
> Also Jay W1VD and Hartmut Wolff used similar antennas, see:
> http://w1vd.com/k9ay11.pdf
> http://jpmere.online.fr/L_F/Les%20LF.htm (scroll to bottom)
>
> 73 K2ORS
>
