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VK6BE > 50MHZ 06.04.07 08:17l 30 Lines 1428 Bytes #999 (0) @ WW
BID : E80748VK6BE
Read: GUEST
Subj: Re: Beam Design
Path: DB0FHN<DB0FOR<DB0SIF<DB0ROF<DB0ACH<DB0PRA<DB0IUZ<DB0OVN<DB0GOS<ON0AR<
VK6HGR<VK2DOT<VK2XGJ<VK2IO<VK2AAB<VK2TV
Sent: 070406/0611Z @:VK2TV.#MNC.NSW.AUS.OC #:7579 [Kempsey, QF68JX] $:E80748VK6
From: VK6BE@VK2TV.#MNC.NSW.AUS.OC
To : 50MHZ@WW
I have operated 50 mHz for 52 years and have built several beams. When I
moved house to my present location and wanted a 6 metre beam in a hurry to
use till I had time to get or make a reasonably good beam I made a 2
element cubical quad. This was easy using two 12" x 12" timber end plates
of 1 inch pine or some other timber, with holes about three inches deep
drilled in each side to take 1/2" dowel spreaders. This gave me the
spiders at each end. I then drilled a 1/8" hole through the ends of the
spreaders at the correct distance from the centre and threaded copperwire
through to form the reflector and driven element. Then a stub to tune the
driven element out of twin lead, and connected 72 ohm twin lead (or coax
is OK even without a balun) directly to the element. As a temporary
antenna it worked fine. Measurements were taken from the ARRL handbook or
can be found in most handbooks.
A couple of years later getting a permanent antenna for 6 was easy as the
TV Channel 0 yagi sold commercially with the transformers shorted out
resonated on 50 megs. Now of course commercial units are reasonably cheap
and sold everywhere where there is ham gear for sale in this country at
least..
Bob VK6BE.
> Does anyone have a "quick n durty" beam design?, something that is
> easily knocked up in a short amount of time, and with relatively easy
> to find materials?
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