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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+TowerTalk\s+Digest\,\s+Vol\s+100\,\s+Issue\s+63\s*$/: 14 ]

Total 14 documents matching your query.

1. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: Robert Chudek - K0RC <k0rc@citlink.net>
Date: Sun, 24 Apr 2011 16:06:28 -0500
Jim Brown, K9YC wrote: "BUT - in my experience, vertical dipoles don't work very well on the HF bands." My personal experience is a little different Jim! I have a single self-supporting tower for all
/archives//html/Towertalk/2011-04/msg00425.html (11,442 bytes)

2. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: Mike Fatchett W0MU <w0mu@w0mu.com>
Date: Sun, 24 Apr 2011 15:57:07 -0600
This just proves the old adage you can't ever have enough antennas. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@co
/archives//html/Towertalk/2011-04/msg00426.html (12,670 bytes)

3. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: "Rick Karlquist" <richard@karlquist.com>
Date: Sun, 24 Apr 2011 16:21:04 -0700
It is difficult to feed a vertical dipole in the traditional way in the center without the feedline affecting the pattern. It is also tricky to feed it from the bottom, as a half wave vertical. I did
/archives//html/Towertalk/2011-04/msg00427.html (8,601 bytes)

4. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: "John/K4WJ" <k4wj@att.net>
Date: Sun, 24 Apr 2011 19:34:29 -0400
Rick, How high off the ground was the bottom of the bottom half of the vertical dipole? 73..de John/K4WJ -- Original Message -- From: "Rick Karlquist" <richard@karlquist.com> To: <k0rc@citlink.net> C
/archives//html/Towertalk/2011-04/msg00429.html (9,319 bytes)

5. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: "Gene Fuller" <w2lu@rochester.rr.com>
Date: Sun, 24 Apr 2011 19:53:59 -0400
I've found that a fairly easy to transport and erect antenna for portable operation is just a center fed vertical dipole using 450 ohm line and a true (i.e. not just a balun on the feed line) balance
/archives//html/Towertalk/2011-04/msg00431.html (9,818 bytes)

6. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: "Rick Karlquist" <richard@karlquist.com>
Date: Sun, 24 Apr 2011 17:11:16 -0700
A few inches. Rick N6RK _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mai
/archives//html/Towertalk/2011-04/msg00432.html (8,387 bytes)

7. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: "Gary Schafer" <garyschafer@comcast.net>
Date: Sun, 24 Apr 2011 21:11:02 -0400
Rick, How did you feed the 1/2 wave vertical. From the center or the bottom? 73 Gary K4FMX _______________________________________________ _______________________________________________ TowerTalk ma
/archives//html/Towertalk/2011-04/msg00434.html (9,449 bytes)

8. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Sun, 24 Apr 2011 19:52:36 -0700
Rudy Severns, N6LF, figured out a way to end feed it, and I expanded on it. I built my version and hung it from a pulley high in a redwood, with the top about 110 ft above ground. It works, but when
/archives//html/Towertalk/2011-04/msg00435.html (8,826 bytes)

9. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Sun, 24 Apr 2011 22:21:03 -0700
A half wave vertical or a vertical dipole doesn't work well when elevated above ground because of reflection losses due to the Brewster angle. This problem is independent of any problems with feeding
/archives//html/Towertalk/2011-04/msg00439.html (10,293 bytes)

10. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Sun, 24 Apr 2011 22:23:05 -0700
Fed from the bottom with series inductor and shunt capacitor. You can now buy a version of this from Par Electronics. Rick N6RK _______________________________________________ _______________________
/archives//html/Towertalk/2011-04/msg00440.html (10,484 bytes)

11. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 25 Apr 2011 01:48:54 -0400
Verticals in general (ground plane or vertical dipoles) are inferior to a dipole more than 0.4 wavelength above ground unless they are over a large expanse of salt water - e.g., "verticals on the be
/archives//html/Towertalk/2011-04/msg00441.html (11,652 bytes)

12. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Mon, 25 Apr 2011 06:32:12 -0700
really more the reflectivity of an interface between dielectrics being very high for waves polarized parallel to the interface (i.e. Horizontal) independent of incidence angle, but varying a lot for
/archives//html/Towertalk/2011-04/msg00448.html (10,319 bytes)

13. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Mon, 25 Apr 2011 06:37:35 -0700
I'm curious about this. Why would it do so? The physics of this is pretty well understood and it's not one of the areas where approximations need to be made or where the "finite element-ness" of it b
/archives//html/Towertalk/2011-04/msg00449.html (9,661 bytes)

14. Re: [TowerTalk] TowerTalk Digest, Vol 100, Issue 63 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 25 Apr 2011 09:51:21 -0400
NEC may model the pattern for vertical antennas but not the magnitude. It regularly understates losses in the near field resulting in an overstatement of absolute signal levels in the far field - pa
/archives//html/Towertalk/2011-04/msg00450.html (11,129 bytes)


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