[TowerTalk] homemade beams

[Mirko Sibilja]

Another way to make the gamma match capacitor is to use piece of coax cable
with braid removed, inserted into gamma tube. Calculate the neccessary
lenght by cable's capacity/length unit.

S57AD
----- Original Message -----
From: Floyd Sense <sentek at sprintmail.com>
To: Gregg Seidl <k9kl at gbonline.com>; <TowerTalk at contesting.com>
Sent: Friday, June 20, 2003 7:15 PM
Subject: Re: [TowerTalk] homemade beams


> The gamma match cap is pretty easy.  I've always made the cap from two
> loosely telescoping pieces of tubing, covering the inside one with shrink
> wrap tubing.  That tube then serves as the gamma match tube and you adjust
> the cap by moving the inner tube in or out.
>
> K8AC
> ----- Original Message -----
> From: "Gregg Seidl" <k9kl at gbonline.com>
> To: <TowerTalk at contesting.com>
> Sent: Friday, June 20, 2003 10:14 AM
> Subject: [TowerTalk] homemade beams
>
>
> > I would like to know if any one has built any of the beams in the 19th
> > edtion Antenna book by the ARRL.I'm considering building either a 3 or 4
> > element 20 beam.I'm thinkimg about useing a hairpin match mostly because
I
> > don't know how a gamma match works and where to find the cap that is
> > needed.I know you need to insulate the driven elemnt from the boom on a
> > hairpin but that I think could be done with some pvc or such,kinda like
> > Mosley does.As a matter of fact I think I have an old Mosley center
> element
> > in the shed.Any help would be great.I know I could never come close to
> > builing a JRC JST-245 but I think I could build a 4 element beam just as
> > good as M2 or whatever and maybe save a few bucks to buy another
> JST-245,ok
> > maybe not!!!   Gregg  K9KL
> >
> >
> > _______________________________________________
> >
> > 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 at 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 at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk