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Total 195 documents matching your query.

101. Re: [TowerTalk] Fwd: Bandwidth of a 75/80 meter dipole (score: 3)
Author: "W0MU Mike Fatchett" <w0mu@w0mu.com>
Date: Tue, 17 Mar 2009 15:06:09 -0600
This is it! CC Packet Cluster W0MU-1 W0MU.NET or 67.40.148.194 "A slip of the foot you may soon recover, but a slip of the tongue you may never get over." Ben Franklin It's even better than that - a
/archives//html/Towertalk/2009-03/msg00491.html (14,584 bytes)

102. Re: [TowerTalk] Fwd: Bandwidth of a 75/80 meter dipole (score: 3)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 17 Mar 2009 16:58:46 -0400
The W6NL approach is 1/2 WL of 50-ohm coax, followed by a quarter wave of 75-ohm, followed by as much 50-ohm as it takes to get to the house. 73, Pete _______________________________________________
/archives//html/Towertalk/2009-03/msg00490.html (16,215 bytes)

103. Re: [TowerTalk] Fwd: Bandwidth of a 75/80 meter dipole (score: 3)
Author: "Bill Parry" <bparry@rgv.rr.com>
Date: Tue, 17 Mar 2009 15:49:44 -0500
I have a full sized sloper with the 1/4 wavelength piece of RG6 (was lighter than RG11 hanging out of the antenna) between the antenna and the RG213 coax (length of the RG213 is irrelevant.) Broadens
/archives//html/Towertalk/2009-03/msg00489.html (13,693 bytes)

104. Re: [TowerTalk] Fwd: Bandwidth of a 75/80 meter dipole (score: 3)
Author: dan edwards <w5xz@att.net>
Date: Tue, 17 Mar 2009 13:35:00 -0700 (PDT)
my antenna handbook shows one wavelength of rg-213 starting at the feepoint, followed by 1/4 wavelength of RG-11 does the trick nicely, with low losses at the band edges. if that will make it to the
/archives//html/Towertalk/2009-03/msg00488.html (12,700 bytes)

105. Re: [TowerTalk] Fwd: Bandwidth of a 75/80 meter dipole (score: 3)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 17 Mar 2009 16:31:45 -0400
It's even better than that - a piece of 75-ohm coax permanently in the line at the right place gives a frequency characteristic that has a double-dip. I think the idea was first thought of (or at lea
/archives//html/Towertalk/2009-03/msg00487.html (13,767 bytes)

106. Re: [TowerTalk] Fwd: Bandwidth of a 75/80 meter dipole (score: 3)
Author: "W0MU Mike Fatchett" <w0mu@w0mu.com>
Date: Tue, 17 Mar 2009 14:13:13 -0600
K5TR has another way. He sent me how to do it but I can't find it. I recall a piece of 75 ohm coax that was switched into the line. Maybe Geo will post it. Mike W0MU CC Packet Cluster W0MU-1 W0MU.NET
/archives//html/Towertalk/2009-03/msg00486.html (11,938 bytes)

107. Re: [TowerTalk] Fwd: Bandwidth of a 75/80 meter dipole (score: 3)
Author: K4SAV <RadioIR@charter.net>
Date: Tue, 17 Mar 2009 09:54:35 -0500
There are several ways to make a dipole cover all of 75/80 meters, and also many ways that don't work. A double Bazooka doesn't cut it. It only provides about 14% increase in bandwidth at the expense
/archives//html/Towertalk/2009-03/msg00472.html (9,716 bytes)

108. Re: [TowerTalk] WTB: GAP VOYAGER and a ???? (score: 3)
Author: Neal Campbell K3NC <nealk3nc@gmail.com>
Date: Fri, 9 May 2008 14:24:50 -0400
You need the "tuner" 4:1 balun from Array Solutions and should have a tuner in the shack. Unless you have a very long run for coax I do not think you will lose a lot in losses. I replaced a HF6V with
/archives//html/Towertalk/2008-05/msg00112.html (13,447 bytes)

109. Re: [TowerTalk] WTB: GAP VOYAGER and a ???? (score: 3)
Author: K4SAV <RadioIR@charter.net>
Date: Fri, 09 May 2008 12:16:14 -0500
You have it correct. It's just a 43 ft aluminum pole. Run that thru EZNEC and you can see what happens to the radiated pattern on the high bands, and notice the impedance on different bands. Yes the
/archives//html/Towertalk/2008-05/msg00111.html (11,726 bytes)

110. Re: [TowerTalk] WTB: GAP VOYAGER and a ???? (score: 3)
Author: <ve4xt@mts.net>
Date: Fri, 9 May 2008 12:05:02 -0500
Having looked at the Array Solutions website, and not being smart enough to put two-and-two together, how does the ZeroFive work? It looks like a single continuous radiator -- great for 40, 80 and 16
/archives//html/Towertalk/2008-05/msg00110.html (11,402 bytes)

111. Re: [TowerTalk] WTB: GAP VOYAGER and a ???? (score: 3)
Author: K4SAV <RadioIR@charter.net>
Date: Fri, 09 May 2008 11:56:01 -0500
I don't understand the reasoning for using double bazookas on 40 and 80. The only thing that a bazooka provides is wider bandwidth, and that increase is so miniscule that it doesn't seem to be worth
/archives//html/Towertalk/2008-05/msg00109.html (9,582 bytes)

112. [TowerTalk] Coax Search..?? (score: 3)
Author: "Bill Winkis" <kc4pe@bellsouth.net>
Date: Fri, 18 Jan 2008 07:31:27 -0500
I have spent hours going through the internet looking for a dealer that has: RG-58 with the steel copper coated center conductor. Does anyone know you might have such, I called the "Wireman", and he
/archives//html/Towertalk/2008-01/msg00355.html (7,191 bytes)

113. Re: [TowerTalk] 1 1/2 wave inverted vee (score: 3)
Author: Terry Conboy <n6ry@arrl.net>
Date: Sat, 11 Aug 2007 21:42:44 -0700
A 1.5 wl dipole or inverted vee at modest heights probably won't provide any more usable gain than a half-wave dipole or inverted vee under many circumstances, but it really depends on a lot of varia
/archives//html/Towertalk/2007-08/msg00323.html (8,188 bytes)

114. Re: [TowerTalk] Question on Multiple Inverted L Antennas (score: 3)
Author: wa3afs@inav.net
Date: Thu, 13 Jul 2006 18:09:26 -0400
My coaxial inverted Ls can be thought of as 1/2 of a bazooka. It is fed by coax. At the antenna base the shield of the feeding coax goes to the center conductor of the RG8X coax of the antenna and th
/archives//html/Towertalk/2006-07/msg00476.html (11,912 bytes)

115. Re: [TowerTalk] 160M OCF Dipole Length (score: 3)
Author: K4SAV <RadioIR@charter.net>
Date: Sat, 25 Feb 2006 12:50:16 -0600
It sounds like you don't have a current mode balun, or maybe your balun isn't working properly. If it's a voltage mode balun, the feedline will act as part of the antenna and change the resonant freq
/archives//html/Towertalk/2006-02/msg00364.html (11,591 bytes)

116. [TowerTalk] 160M OCF Dipole Length (score: 3)
Author: "W4ZW" <w4zw@comcast.net>
Date: Sat, 25 Feb 2006 10:34:36 -0500
I decided to try a OCF (Off Centerfed Dipole) dipole for the 160M contest this weekend rather than trying to put up the extended double bazooka I normally use. The bazooka worked well but was a singl
/archives//html/Towertalk/2006-02/msg00362.html (9,732 bytes)

117. [TowerTalk] Re: Force12 (score: 3)
Author: K3BU@aol.com (K3BU@aol.com)
Date: Fri, 12 Oct 2001 08:13:33 EDT
Tom, Nice try to dance out of it :-) Who is talking about coaxial dipoles? So it worked for some 50 years, now you "calculate" it doesn't? 73 Yuri, K3BU List Sponsored by AN Wireless: AN Wireless han
/archives//html/Towertalk/2001-10/msg00254.html (8,902 bytes)

118. [TowerTalk] Re: Force12 (score: 3)
Author: W8JI@contesting.com (Tom Rauch)
Date: Fri, 12 Oct 2001 06:58:51 -0400
Except for balance, there is no difference between that arrangement and the arrangement in a coaxial dipole. A stub across the feedpoint would have to have a few ohms of Zo to do significant reactan
/archives//html/Towertalk/2001-10/msg00251.html (9,218 bytes)

119. [TowerTalk] 75M Rotatable Dipoles,lack of SWR bridges (score: 3)
Author: K7GCO@aol.com (K7GCO@aol.com)
Date: Wed, 15 Aug 2001 13:26:19 EDT
<< In a message dated 8/14/01 6:04:47 PM Pacific Daylight Time, coneal@ma.ultranet.com writes: << So, the question: Would an 80M inverted V a few feet below the C3XLD have a negative effect on its pa
/archives//html/Towertalk/2001-08/msg00360.html (13,027 bytes)

120. Re: [TowerTalk] Fwd: Peak Voltage at the tips of ants ? (score: 2)
Author: Keith Dutson <kdutson@sbcglobal.net>
Date: Wed, 5 Oct 2022 01:13:01 +0000 (UTC)
You already sound like an expert.  So, the obvious question I have is - why do you want to know the precise voltage?  Sounds like an academic exercise.  SRI, I got tired of academics after being grad
/archives//html/Towertalk/2022-10/msg00037.html (9,317 bytes)


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