Topband: K9AY RX antenna

HP pfizenmayer at q.com
Mon Jan 31 17:03:12 EST 2022


While listening on your RX ant try opening and shorting the feedline to your TX antenna -I bet there is a big change in RX signal and F/B on a given station will change . 

My model of a 2 el active rx array pattern when I change the impedance presented to the center of my inv vee shows that if that impedance at center of the inv vee is not above 500 ohms -it will seriously destroy the two el pattern. ( For quick look I did it for real part -have not looked at pattern degradation vs reactive loads since my feedline to the inv vee happens to be a half wave long .) 

Hank K7HP 

----- On Jan 31, 2022, at 7:10 AM, Pete Smith N4ZR <pete.n4zr at gmail.com> wrote: 


My K9AY loop (the commercial version from Array Solutions) seems to be 
kind of an indifferent performer. I believe it is set up properly. and 
I've laid down a radial under each side of the loops, but while it shows 
some directivity on high-end broadcast stations, 160M directivity is 
limited to nil, signal strengths are rarely better than my inverted-L, 
and the adjusting the termination seems to make very little difference. 
Any hints? 

-- 
73, Pete N4ZR 
Check out the new Reverse Beacon Network 
web server at<http://beta.reversebeacon.net>. 
For spots, please use your favorite 
"retail" DX cluster. 
_________________ 
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector 





More information about the Topband mailing list