so,
what do I do for simple inverted vee or sloped dipole?
1:1 voltage balun or coax choke?
On Mon, Apr 27, 2015 at 1:47 PM, john@kk9a.com <john@kk9a.com> wrote:
> Good choice abandoning the off center fed antenna plan. A dipole is a
> really simple and effective antenna.
>
> John KK9A
>
>
> To: jim@audiosystemsgroup.com
> Subject: Re: [TowerTalk] choke / balun design needed
> From: Alex Malyava <alex.k2bb@gmail.com>
> Date: Mon, 27 Apr 2015 12:50:32 -0400
> List-post:
>
> Thanks Jim,
> I will read that :)
>
> Most likely, facing the frying problem, I will go with simple dipole or
> vertical delta.
>
> On Mon, Apr 27, 2015 at 12:41 PM, Jim Brown <jim@audiosystemsgroup.com>
> wrote:
>
> > On Mon,4/27/2015 6:50 AM, Alex Malyava wrote:
> >
> >> What would be the bestest design for choke or balun to be used with
> dipole
> >> or OCF dipole?
> >> Like what type of core, number of turns or number of beads?
> >>
> >
> > k9yc.com/RFI-Ham.pdf
> >
> > See the Choke Cookbook and text that precedes it.
> >
> > An off-center fed antenna is inherently poorly balanced, so it puts a
> high
> > common mode current on the feedline, which in turn places a high common
> > mode voltage across any choke. It is well known that even very good
> common
> > mode chokes are likely to fry (fail destructively) when used with even
> > moderate power levels. You MIGHT get away with it at 100W, but at some
> > higher power level it WILL break.
> >
> > 73, Jim K9YC
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|