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Total 305 documents matching your query.

101. Re: [TowerTalk] Balun question shield leakage (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Thu, 14 Jun 2007 21:26:31 -0400
When "cyborg" comes into fashion, I'm going to get a VNA built into my gut so I can calibrate the feelings ;-) Dan _______________________________________________ ___________________________________
/archives//html/Towertalk/2007-06/msg00450.html (9,675 bytes)

102. Re: [TowerTalk] Vertical Lightning Protection (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Tue, 19 Jun 2007 15:04:14 -0400
"What I would like to find out is the preferred method of lightning protection (that is, shunting it to ground). There seem to be two methods: a spark gap, and a shunt coil" For what it's worth, if y
/archives//html/Towertalk/2007-06/msg00626.html (7,496 bytes)

103. Re: [TowerTalk] Fwd: Re: vertical ground experiment (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Thu, 21 Jun 2007 17:51:49 -0400
That the feedpoint impedance is 27 ohms. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.c
/archives//html/Towertalk/2007-06/msg00687.html (7,483 bytes)

104. Re: [TowerTalk] Ready Mix Cement (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Tue, 26 Jun 2007 02:43:02 -0400
Go here: http://www.radiancorp.com/ROHNNET/rohnnet2004/html2004/index.html Click on "On Line Catalog" and then GT series and then 25G They have parts lists, guying details and foundation details the
/archives//html/Towertalk/2007-06/msg00744.html (7,883 bytes)

105. Re: [TowerTalk] can we please stop (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sat, 30 Jun 2007 23:50:33 -0400
Like the labels on pipes in some of the university lab buildings I've been in: Cold water --> <-- Sewer Hot water --> Steam --> <-- Condensate And there it is, with all the rest: Vacuum --> 73, Dan
/archives//html/Towertalk/2007-06/msg00997.html (8,724 bytes)

106. Re: [TowerTalk] How tall is that tower? (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Thu, 2 Aug 2007 16:53:00 -0400
"P.S. It was scientists that couldn't convert that crashed the Mars orbiter." There's a difference between "couldn't" and "didn't" Incidentally, I'm never, ever trying to build a VHF/UHF yagi without
/archives//html/Towertalk/2007-08/msg00067.html (9,621 bytes)

107. [TowerTalk] RG-6 quality ? (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Fri, 3 Aug 2007 01:09:43 -0400
What can I expect as far as variation in cable quality at UHF if I buy RG-6 at Home Depot or Lowes or Circuit City? I need a 35-40' run of something with less loss than RG-58 by Saturday to play arou
/archives//html/Towertalk/2007-08/msg00087.html (7,369 bytes)

108. [TowerTalk] Another coax question (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 5 Aug 2007 12:44:56 -0400
Thanks for all the good info on RG-6 in ham applications. It seems like simple good sense to start using it so I'm going to get the tools to do so. I solved my UHF problem another way, though, and I
/archives//html/Towertalk/2007-08/msg00175.html (8,087 bytes)

109. [TowerTalk] Good and cheap F-BNC adapters (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 5 Aug 2007 19:03:09 -0400
I went out to Home Depot and got some fittings, RG-6 quad shield (swept to 3GHz), and the compression tool, so I'm in business mostly for using RG-6 and F connectors. The one thing I don't have at th
/archives//html/Towertalk/2007-08/msg00190.html (8,818 bytes)

110. Re: [TowerTalk] Good and cheap F-BNC adapters (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 5 Aug 2007 22:28:59 -0400
That's good to know... however, at $5 a pop it looks like a Snap N Seal BNC costs five to ten times more than an F connector (5x a waterproof one, 10x the regular home depot ones) and the BNC-F adap
/archives//html/Towertalk/2007-08/msg00196.html (8,842 bytes)

111. Re: [TowerTalk] 30m Moxon (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 19 Aug 2007 17:33:49 -0400
I'm using one on 20m and wishing I had one on 30m! I think it would be a good antenna for 30m but you should probably also look into driver-director yagis because the band is so narrow that even a cl
/archives//html/Towertalk/2007-08/msg00529.html (8,809 bytes)

112. Re: [TowerTalk] [RFI] Subwoofer resolution (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Mon, 20 Aug 2007 13:13:41 -0400
"It turns out that the dominant cause of the susceptibility was a pin 1 problem!" It's not only microphones. Our lab's data acquisition cards and breakout boxes have a pin 1 problem as well. Very pop
/archives//html/Towertalk/2007-08/msg00537.html (7,068 bytes)

113. Re: [TowerTalk] Topband: RG-6 & Connectors (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sat, 25 Aug 2007 14:43:33 -0400
"Our friends at R**-S** have a nice one that makes a real professional six-sided crimp." I like the compression connectors better than I like the crimp ones. A compression connector tool is $15 at Ho
/archives//html/Towertalk/2007-08/msg00667.html (7,479 bytes)

114. [TowerTalk] Series section connectors... (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 26 Aug 2007 13:45:31 -0400
I've been playing with series-section transformers to go from 50 ohms to 75 ohms and back (twelfth wave and now a wider bandwidth version that's two stages of twelfth wave to an intermediate impedanc
/archives//html/Towertalk/2007-08/msg00712.html (7,295 bytes)

115. [TowerTalk] Corroded copper conductivity? (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Tue, 28 Aug 2007 09:58:12 -0400
Has anyone measured corroded copper inductor Q vs. shiny new copper at HF frequencies? Specifically, I wonder if there'd be any practical benefit to polishing and coating a 3/4" copper pipe transmitt
/archives//html/Towertalk/2007-08/msg00779.html (7,069 bytes)

116. Re: [TowerTalk] Tower Climber (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Mon, 10 Sep 2007 23:00:40 -0400
The worst part about this is that he seems to be pretty worried that he's going to fall off. It's like someone dared him to do this. It's clearly stupid to climb a tower without a safety harness, but
/archives//html/Towertalk/2007-09/msg00305.html (8,244 bytes)

117. [TowerTalk] Good panel mount F jack (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Tue, 11 Sep 2007 12:25:45 -0400
I've recently become about $20 worth of aware that 74 cent panel mount F jacks from eBay are worth about zero cents apiece. They showed up and were totally unmountable because the threads on the back
/archives//html/Towertalk/2007-09/msg00317.html (8,212 bytes)

118. Re: [TowerTalk] RG6 (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Tue, 11 Sep 2007 16:52:39 -0400
I'm using it matched at 100W on a lot of antennas now, but I've heard it can take a kilowatt matched. I can't test that, I only run barefoot. It's lower loss than RG-8/X and about the same size... so
/archives//html/Towertalk/2007-09/msg00328.html (7,761 bytes)

119. Re: [TowerTalk] RG6 (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Tue, 11 Sep 2007 17:40:09 -0400
Jeremy, Got any more specific description than "zapped" or did you not do an autopsy? Did it seem to be voltage breakdown or heat related? I guess it was SSB/CW duty cycle since you were at both end
/archives//html/Towertalk/2007-09/msg00333.html (8,038 bytes)

120. Re: [TowerTalk] RG6 (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Tue, 11 Sep 2007 17:40:42 -0400
Sorry... Carl! Looked at the email adress!!! _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lis
/archives//html/Towertalk/2007-09/msg00334.html (7,484 bytes)

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