> Fwiw, on 80M I have a version of the K1WA: 4 equal-length
> coax lines, run from a select-one-ground-the-rest coax
> switch next to the rig, out underground to 4 sloppers (sic)
> NE-SE-SW-NW with (R&L-brand) current baluns at feedpoints.
I don't know the configuration or construction of the R&L
current balun but with 150 feet of foam coax having a Vf
of .8 - .84 you are running roughly 5/8 wave lines which is
one ay to make the grounded switch work correctly.
73,
... Joe, W4TV
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of David
> J Windisch
> Sent: Monday, April 20, 2009 10:05 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Sloping Dipole question
>
>
> Fwiw, on 80M I have a version of the K1WA: 4 equal-length
> coax lines, run
> from a select-one-ground-the-rest coax switch next to the rig, out
> underground to 4 sloppers (sic) NE-SE-SW-NW with (R&L-brand)
> current baluns
> at feedpoints. In my case, tweaking the line lengths to
> around 150' gave as
> much as 3-4 S-units F-B and 1-2 S-units F-S, which is enough
> "good pattern"
> for me. Dunno what the gain is, if any. It's still tough to crack
> I-95-corridor pileups from out here in flyover coutry, but
> it's noticeably
> easier than with a single slopper, high dipole, or delta
> loop. Best I've
> been able to do so far with one tower on an acre lot.
> 73 Dave W8FGX
>
> Oh, yes, I have had to rethink the mechanics of the
> parasitically-coupled
> 30M wires. Holding the spacers in place was too kluge-y even
> for me. I'll
> gbtu real soon now.
>
> ----- Original Message -----
> From: "Steve Jarrett" <k4fj@k4fj.com>
> To: <towertalk@contesting.com>
> Sent: Monday, April 20, 2009 1:17 PM
> Subject: [TowerTalk] Sloping Dipole question
>
>
> >I have seen K1WA's excellent article in the Antenna Handbook
> for years
> >regarding sloping half-wave dipole arrays. His design
> switches both
> >the center conductor and braid for each feedline.
> >
> > Is it really important to switch the braid?
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|