FWIW, I use an 18HT on 160 with elevated radials. The first version
followed Hygain's method of base loading with a big coil at the feed point.
Turns out that there is a high voltage point between the top of the tower
and the stinger - I blew a big hole in the insulator while running full
power. Now the Hytower is top loaded and works great.
With the elevated radials the feed point z is about 20 ohms so I feed it
with an unun. I get about 60 Khz bandwidth at the 2:1 swr points.
de Paul, W8AEF
----- Original Message -----
From: "Dan Bookwalter" <n8dcj@yahoo.com>
To: <towertalk@contesting.com>
Sent: Wednesday, August 04, 2004 1:55 PM
Subject: [TowerTalk] Antenna for 40 & 80
> Hello All
>
> i know this isnt exactly tower related but i think it
> shoul dbe ok...
>
> my plan was to use 1 feedline to feed a 40m and 80m
> Inv V , but , i have lost the support to tie one end
> of the antenna to , this will be going on my TX-472
> crankup. i currently have a 160m Inv L going up one
> side of the tower. i am looking around for other
> configurations to use for 40/80.
>
> any ideas ??
>
> i do have an 18HT i could put up , but , i was hoping
> to avoid that...
>
> Dan N8DCJ
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|