[TowerTalk] Sloping Dipole question

[Joe Subich, W4TV]

> 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 at contesting.com 
> [mailto:towertalk-bounces at contesting.com] On Behalf Of David 
> J Windisch
> Sent: Monday, April 20, 2009 10:05 PM
> To: towertalk at 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 at k4fj.com>
> To: <towertalk at 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?
>