[TowerTalk] 40M beam

[Dan]

Mark: Nice beams. Are the loading coils the small bumps I see about 2/3 way
out each element?.What is the material used in the center of your elements
and how long is it? Are the F12 and HyGain elements from shortened 40 m
beams? What is your matching system? Do you use cable clamps on the Philly?
Tnx, 73, Dan, N5AR----- Original Message -----
From: Mark Beckwith <mark at concertart.com>
To: <towertalk at contesting.com>
Sent: Thursday, January 30, 2003 2:50 PM
Subject: Re: [TowerTalk] 40M beam


> Robert, I built these a couple months ago:
>
> http://home.swbell.net/swca/radio/New40s.JPG
> http://home.swbell.net/swca/radio/JA40.JPG
> http://home.swbell.net/swca/radio/EU40.JPG
>
> They have a small amount of loading coil on them so they will clear the
guys
> when turning.  They are *nearly* full sized.  One is made from Force 12
> elements, one is made from HyGain elements.  I added about 16 feet in the
> center of each.  Element length is more like 58-60 feet.  Reflector to
> Director is about 38 feet (I used 44' booms because I will add 20M
elements
> later [4-el on 44']).  Booms are 3".  The inner 30 feet are .125" wall and
> the outer 7' on each end is KLM boom.  There is a lot of Phillystran
holding
> up the boom and elements.  They have weathered an ice storm with 1 radial
> inch of ice.
>
> The water tower in the big photo of both yagis is 100 feet tall.
>
> Anyway, if you would like to know more, let me know.
>
> Mark, N5OT
>
> ----- Original Message -----
> From: "Robert Webb" <G0urr at btopenworld.com>
> To: "towertalk" <towertalk at contesting.com>
> Sent: Thursday, January 30, 2003 3:13 PM
> Subject: [TowerTalk] 40M beam
>
>
> > Hi everyone, I thought I woulod start my research here, as I know you
lot
> > are very knowledgable and have tried most things !! I am looking to
build
> a
> > 40m beam this spring. Having built some monobanders for 10-20 etc i have
a
> > reasonable idea of what to do, However 40m is a lot bigger. So if you
have
> > done it (built one that is) and would like to share your experiences
then
> > please drop me a line. TIA. 73,s
> > Robert Webb
> > G0URR
> >
> >
> >
> >
> >
> >
> >
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> >
>
>
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