| To: | <topband@contesting.com> |
|---|---|
| Subject: | TopBand: Rotary Flag? |
| From: | pnesbit@melbpc.org.au (P & V Nesbit) |
| Date: | Mon, 10 Aug 1998 22:51:05 +1000 |
For a space-efficient receiving antenna, what about a rotary Flag? It could
use aluminium tubing for the 29' horizontal sections, with the whole thing
supported from a single pole at the centre. To feed it, a 900 ohm feedline
could run from one of the vertical sections to a matching transformer
attached to the mast:
__
. || . support wires
. || .
. || .
-------------------||-------------------
| Al tube || |
| || |
| || |
====|====|====|====|| 900R
| open wire || |
| feeder || |
| || |
-------------------||-------------------
||
||
|| mast
||
||
Any thoughts on a suitable non-conductive mast? I suspect a metallic one
may tend fill in the null.
73,
Peter Nesbit VK3APN
pnesbit@melbpc.org.au
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