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21. Re: Topband: 160M Rhombics (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Fri, 26 Jul 2013 12:33:49 -0500
Tom, Why? The same reason guys put up quads. They LOOK very cool! Imagine standing on one end of the rhombic and saying "well, you can't see the end of the antenna without the binoculars - but it's o
/archives//html/Topband/2013-07/msg00073.html (9,556 bytes)

22. Re: Topband: 160M Rhombics (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Fri, 26 Jul 2013 14:39:04 -0500
I did not say it was *only* for looks. It "also" happens to look amazing. If you are at the ham club and you said "hea I just hung up a 160m rhombic" - the next comment guys would say is "wow, I woul
/archives//html/Topband/2013-07/msg00083.html (10,098 bytes)

23. Re: Topband: Height of antenna and takoff angle - Titan II site571-5 (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Sun, 28 Jul 2013 10:34:40 -0500
Right, the discone is sort of the LPDA of the vertical world. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie --Original Message-- From: Charlie Cunningham Sent: Sunday, July 28, 2013 10:34 AM T
/archives//html/Topband/2013-07/msg00126.html (9,215 bytes)

24. Re: Topband: Blame it on global warming (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Mon, 5 Aug 2013 11:10:59 -0500
Well said, Bill. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie Please!!!! If I want a discussion on global warming, I'll sign on to the Huff Post. This site is for topband info. Bill K4XS/KH7X
/archives//html/Topband/2013-08/msg00037.html (8,239 bytes)

25. Topband: elevated 4-square (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Fri, 16 Aug 2013 00:46:20 -0500
What affect is there of vertical *resistance* variations are the common 4-square boxes? N6LFs QEX article shows quantitatively the performance hit associated with using non-resonant elevated radials.
/archives//html/Topband/2013-08/msg00220.html (6,906 bytes)

26. Topband: Dual band shunt-feeding tower on 160/80 (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Mon, 26 Aug 2013 12:43:44 +0900
A buddy of mine has a 100 25G tower and wants to run it on both 160/80. Im thinking a par of shunts will work for that? If you have done this, I would be interested in your comments on the general im
/archives//html/Topband/2013-08/msg00327.html (6,395 bytes)

27. Re: Topband: Steady Carrier on 80 CW (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Sat, 2 Nov 2013 21:19:57 -0500
S9 in KS @ 2:20 UTC S/SE on HiZ pro 4-8 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie Everyone is measuring the 3501.6 signal only, right? The other ones, if they exist are in the noise for me
/archives//html/Topband/2013-11/msg00068.html (9,652 bytes)

28. Re: Topband: Hi-Z Antennas Two Element Array Systems 2-LV2-5 (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Tue, 11 Feb 2014 18:35:00 -0600
The Hi-Z buffers have a feedpoint Z around 50K ohms. So a single 4' ground rod provides an adequate round system. No radials needed. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie Do the two ve
/archives//html/Topband/2014-02/msg00139.html (7,904 bytes)

29. Re: Topband: Hi-Z Antennas Two Element Array Systems 2-LV2-5 (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Tue, 11 Feb 2014 20:02:48 -0600
It takes some mental gymnastics to wrap your head around a hi-z feedpoint where the radial system is almost negligible vs. a low-z feedpoint (like a typical 30 ohm range transmit vertical) which is s
/archives//html/Topband/2014-02/msg00141.html (10,565 bytes)

30. Re: Topband: TX relays (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Thu, 9 Oct 2014 13:17:21 -0500
There is some data on this page: http://www.w0qe.com/Technical_Topics/small_signal_relays_at_rf.html I have used the RTD140xx series Schrack/Tyco for years in primarily RTTY contesting duty at the KW
/archives//html/Topband/2014-10/msg00041.html (10,519 bytes)

31. Re: Topband: Phased short vertical receive antenna system (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Wed, 19 Nov 2014 20:39:22 +0900
Checkout Hi-Z Antennas. They have what you are looking for. It's sold through DXE now. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie I recall seeing a phased antenna system for the low bands t
/archives//html/Topband/2014-11/msg00072.html (7,907 bytes)

32. Re: Topband: 8 circle: DXE vs Hi-Z (score: 1)
Author: "Jeff Blaine" <jeff@ac0c.com>
Date: Thu, 18 Dec 2014 00:48:38 -0600
Their meaning with respect to "gain as unimportant" is due to the fact that the RX antenna is all about SNR maximization. A low noise preamp can fix overall signal weakness, if your rig's preamps are
/archives//html/Topband/2014-12/msg00285.html (13,083 bytes)


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