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References: [ +from:W4EF@ca.rr.com: 28 ]

Total 28 documents matching your query.

21. Re: [TowerTalk] 4 port network analyzers for balun measurements (score: 1)
Author: Michael Tope <W4EF@ca.rr.com>
Date: Sat, 21 Nov 2015 09:50:20 -0800
Just my $0.02 Danny E73M This is a good point. If the cores are sitting close to a ground plane will the small asymmetries between the conductors in the bifilar turns and the ground plane be large en
/archives//html/Towertalk/2015-11/msg00212.html (7,987 bytes)

22. Re: [TowerTalk] 4 port network analyzers for balun measurements (score: 1)
Author: Michael Tope <W4EF@ca.rr.com>
Date: Sun, 22 Nov 2015 05:27:51 -0800
On 11/21/2015 10:36 AM, Jim Lux wrote: On 11/21/15 9:50 AM, Michael Tope wrote: On 11/21/2015 8:22 AM, Daniel Danny Horvat wrote: Placing an "open" wound 2.4" toroid BALUN on/near a ground plane will
/archives//html/Towertalk/2015-11/msg00219.html (11,642 bytes)

23. Re: [TowerTalk] balun testing (score: 1)
Author: Michael Tope <W4EF@ca.rr.com>
Date: Wed, 25 Nov 2015 11:06:59 -0800
On 11/22/2015 11:26 AM, Jim Lux wrote: On 11/22/15 9:53 AM, Steve Hunt wrote: Unfortunately that test doesn't subject the balun to the maximum CM stress it might experience in a typical application -
/archives//html/Towertalk/2015-11/msg00227.html (12,266 bytes)

24. Re: [TowerTalk] torque arms or not? (score: 1)
Author: Michael Tope <W4EF@ca.rr.com>
Date: Sun, 8 Jan 2017 10:37:15 -0800
I could be wrong, but I suspect one major application for star guying are towers that support very high-gain microwave antennas that require very precise and stable beam pointing. You don't want a mi
/archives//html/Towertalk/2017-01/msg00172.html (13,066 bytes)

25. Re: [TowerTalk] HyGain 155CA dampening rope (score: 1)
Author: Michael Tope <W4EF@ca.rr.com>
Date: Thu, 22 Jun 2017 10:04:49 -0700
Gary, I trust you are adjusting the element lengths on that Wilson 3 element 40 per some sort of NEC optimized dimensions and not the Wilson factory dimensions from the manual? The reason I ask is th
/archives//html/Towertalk/2017-06/msg00301.html (17,540 bytes)

26. Re: [TowerTalk] Effects of Oxidation on Copper Antenna Wire (score: 1)
Author: Michael Tope <W4EF@ca.rr.com>
Date: Wed, 25 Apr 2018 20:16:28 -0700
On 4/24/2018 2:43 PM, jimlux wrote: On 4/24/18 12:05 PM, Shawn Donley wrote: Some recent posts on grounding reminded me of something I've always wondered about.   How is the radiation efficiency of a
/archives//html/Towertalk/2018-04/msg00278.html (13,640 bytes)

27. Re: [TowerTalk] Mobile Tri-ex 70 tower (score: 1)
Author: Michael Tope <W4EF@ca.rr.com>
Date: Fri, 13 Jul 2018 15:15:25 -0700
Some folks I work with had to place some 225-450 MHz corner reflectors on a dry lake bed and anchor them firmly in place. That is when I learned about the existence of the Industrial Fabrics Associat
/archives//html/Towertalk/2018-07/msg00106.html (14,111 bytes)

28. Re: [TowerTalk] Auto tuners, Baluns and open wire feeders (score: 1)
Author: Michael Tope <W4EF@ca.rr.com>
Date: Wed, 18 Jul 2018 09:22:08 -0700
I know you and Dean are buddies, but don't get me started about him.  Since he's using his software which has been shown to be in error in the past, "Introducing an Improved Version of Transmission L
/archives//html/Towertalk/2018-07/msg00165.html (13,151 bytes)


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