Remember that the old 5 element KLM had two driven elements (200 ohm log cell)
effectively making it a 4 element yagi.
73!
Tim K3LR
"Tower (K8RI)" wrote:
> The old KLM was 5 L on a 42 foot boom and I thought it worked well. At
> least it worked well enough that I was happy.
>
> Roger (K8RI)
>
> Ted Bryant wrote:
>
> >Tim and Jim are correct. A 40-ft boom on 20M is a little short for five
> >elements. However, someone once said that sometimes you just gotta use what
> >you got. So, if you have a fairly recent copy of the ARRL Antenna Handbook,
> >there is a design shown in the chapter on HF yagis for a 5-element, 20 meter
> >yagi on a 40-foot boom (520-40.yag on the CD that comes with the handbook).
> >There is also a similar design that comes with K6STI's YO software.
> >
> >73,Ted w4nz
> >
> >
> >
> >
> >>-----Original Message-----
> >>From: towertalk-bounces@contesting.com
> >>[mailto:towertalk-bounces@contesting.com]On Behalf Of Tim Duffy K3LR
> >>Sent: Saturday, October 09, 2004 1:50 PM
> >>To: EL34GUY@aol.com
> >>Cc: towertalk@contesting.com
> >>Subject: Re: [TowerTalk] Wilson 5 element 20 meter monobander
> >>
> >>
> >>Hi Mark!
> >>
> >>I had a brand new one of these in 1979. Its factory dimension
> >>performance was horrible. I was attending college at the time and
> >>thanks to hundreds of key punch cards I was able to model on
> >>the mainframe computers (optimizers were only a dream in the
> >>public sector) a 56 ft boom design which worked much better with
> >>5 elements. As Jim, SM2EKM (He visited me about the time I
> >>extended the boom in 1980) pointed out, 5 elements on 40 ft boom
> >>is one element to many for that boom length.
> >>
> >>73!
> >>Tim K3LR
> >>
> >>EL34GUY@aol.com wrote:
> >>
> >>
> >>
> >>>Hello,
> >>>
> >>>Does anyone have any experience with the large 3 inch 40ft boom Wison
> >>>monobander for 20 meters? Im wondering how well it works and if
> >>>
> >>>
> >>it was reoptimized
> >>
> >>
> >>>and what the new spacings might be? 73
> >>>
> >>>Mark
> >>>W0NCL
> >>>_______________________________________________
> >>>
> >>>
> >
> >_______________________________________________
> >
> >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
> >
> >
> >
>
> --
> Roger Halstead (K8RI ARRL Life Member)
> Worlds Oldest Debonair (N833R S# CD-2)
> www.rogerhalstead.com
>
> _______________________________________________
>
> 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
_______________________________________________
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
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