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1. Re: [TowerTalk] Antenna Switch Needed (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 30 Jan 2009 16:59:31 -0500
I have to admit to being prejudiced but when top station builders like those at Radio Arkla (OH8X) want reliability and flexibility, their choice is the microHAM Station Master and microHAM single or
/archives//html/Towertalk/2009-01/msg00458.html (9,914 bytes)

2. Re: [TowerTalk] Ham M rotor freezing to accessory shelf (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 16 Feb 2009 11:57:15 -0500
Probably something as simple as difference in paint ... ice will adhere to some paints and not to others. Yes, I believe Hy-Gain even supplied suitable washers at some times in their history. Any of
/archives//html/Towertalk/2009-02/msg00400.html (12,329 bytes)

3. Re: [TowerTalk] WSPA-TV Tower Collapse (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 3 Mar 2009 18:25:58 -0500
That's entirely possible. Many of the big broadcast TV antennas can be at least that heavy ... for example the Dielectric TW12Bx antenna which is what WSPA is listed as using in the FCC database is
/archives//html/Towertalk/2009-03/msg00074.html (10,619 bytes)

4. Re: [TowerTalk] Crossover Transfer Relay (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 14 Mar 2009 21:02:13 -0400
The KK1L "three relay" configuration is a copy of the switching configuration used since the very beginning in the microHAM Double Six and Double Ten Switches. See the basic information at: www.micro
/archives//html/Towertalk/2009-03/msg00368.html (10,652 bytes)

5. Re: [TowerTalk] NO DESK DISCUSSION PLEASE! (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 17 Mar 2009 10:39:50 -0400
If contesting.com is not interested, check with KA9FOX who is now running QTH.NET along with his QTH.COM commercial site. 73, ... Joe, W4TV _______________________________________________ ___________
/archives//html/Towertalk/2009-03/msg00470.html (15,645 bytes)

6. Re: [TowerTalk] hy-gain 155 ba (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 28 Mar 2009 11:01:22 -0400
The 105BA will not go to 12 meters unless you replace all of the element tips (not long enough) and model the antenna for proper element diameter/mounting. On the other hand, the dimensions for conve
/archives//html/Towertalk/2009-03/msg00848.html (7,956 bytes)

7. Re: [TowerTalk] Vertical vs Beam (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 5 Apr 2009 14:35:03 -0400
Again, it depends on height. EZNEC and similar software will show the dipole (in its favored direction) will equal the vertical at around 50 feet in transmit. In receive the dipole will generally be
/archives//html/Towertalk/2009-04/msg00033.html (11,299 bytes)

8. Re: [TowerTalk] Vertical vs Beam (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 5 Apr 2009 21:52:29 -0400
While the current maxima may be 1/4 wave above ground the high E field end of the 1/2 wave vertical (or vertical dipole) is very close to the ground. As a result a 1/2 wave vertical sustains substan
/archives//html/Towertalk/2009-04/msg00082.html (13,958 bytes)

9. Re: [TowerTalk] Vertical vs Beam (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 6 Apr 2009 10:24:27 -0400
One can see the answers to most of these questions in the picture here: http://tf.nist.gov/timefreq/images/radiostations/wwvh-large/wwvh5.jpg All of the verticals are similar in construction ... note
/archives//html/Towertalk/2009-04/msg00116.html (11,462 bytes)

10. Re: [TowerTalk] Vertical vs Beam (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 6 Apr 2009 17:59:14 -0400
The radials were added at WWVH after field strength testing showed that the half wave verticals failed to produce the expected field strength due to e-field losses in the ground below the bottom end
/archives//html/Towertalk/2009-04/msg00160.html (15,687 bytes)

11. Re: [TowerTalk] Vertical vs Beam (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 7 Apr 2009 00:37:11 -0400
This goes back more than 10 years and was probably on topband rather than Towertalk. About the same time as the information on the WWVH radials, N7CL provided data from some of his work for the DOD
/archives//html/Towertalk/2009-04/msg00196.html (13,520 bytes)

12. Re: [TowerTalk] Cage dipole revisited. (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 11 Apr 2009 00:52:45 -0400
Put simply, for such claim to be valid the feed impedance of the cage dipole would need to be substantially less than 50 Ohms such that the total current flowing in the cage elements was approximate
/archives//html/Towertalk/2009-04/msg00359.html (9,609 bytes)

13. Re: [TowerTalk] sloping dipole arrays (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 20 Apr 2009 21:45:16 -0400
A common mode choke does not solve the issues of grounding the shields of the coax in the K1WA design. The K1WA design relies on the 3/8 wave open coax acting like an inductor to tune the unused slop
/archives//html/Towertalk/2009-04/msg00576.html (11,313 bytes)

14. Re: [TowerTalk] Sloping Dipole question (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 20 Apr 2009 23:29:40 -0400
I don't know the configuration or construction of the R&L current balun but with 150 feet of foam coax having a Vf of .8 - .84 you are running roughly 5/8 wave lines which is one ay to make the grou
/archives//html/Towertalk/2009-04/msg00581.html (10,168 bytes)

15. Re: [TowerTalk] K9AY Antenna Question (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 24 Apr 2009 15:27:09 -0400
The forward "beamwidth" of the K9AY is about 150 degrees. The real advantage of the K9AY is the front to back ... The K9AY does not have a real sharp rearward null but the rear response is generally
/archives//html/Towertalk/2009-04/msg00707.html (9,119 bytes)

16. Re: [TowerTalk] Advice pse : Log Periodic versus small Steppir (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 8 May 2009 11:12:51 -0400
The T6 has a higher gain due to a boom that is more than twice the length of the 2 element SteppIR. The 3 element SteppIR is a much better "apples to apples" comparison with either the T6 or T8. Rep
/archives//html/Towertalk/2009-05/msg00158.html (14,606 bytes)

17. Re: [TowerTalk] TV Channels 2-6 Post Transition (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 17 May 2009 06:24:51 -0400
Channel 6 is 80-88 MHz - not 70 MHz. 70 t0 74 MHz is allocated to non-broadcast use in the US. It is between TV channels 4 and 5 and would not be freed by the reduction of low band VHF stations follo
/archives//html/Towertalk/2009-05/msg00337.html (13,460 bytes)

18. Re: [TowerTalk] optimum vertical length (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 1 Jun 2009 08:58:10 -0400
Even a low Yagi (25' on 10 meters) has a take off angle around 15 degrees. The 43' vertical is much too tall to be usable on 15 and particularly 10 meters. On 10 meters the dominant lobe is at 57 de
/archives//html/Towertalk/2009-06/msg00003.html (10,440 bytes)

19. Re: [TowerTalk] optimum vertical length (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 1 Jun 2009 09:59:21 -0400
In my opinion, the "optimum" solution consists of two antennas. The first would be a roof mounted 22 foot vertical (either a "half size" 43' vertical with tuner or an R5/AV-620) for 20-10 meters and
/archives//html/Towertalk/2009-06/msg00007.html (11,037 bytes)

20. Re: [TowerTalk] Multi-band HF antenna replacement (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 3 Jun 2009 01:03:01 -0400
The test reports I have seen show data on three Mosley models: the TA-33, Pro-77 and Pro-57B. Similarly, there are two Hy-Gain models, two Force-12 models and one each from CushCraft, Bencher, and K
/archives//html/Towertalk/2009-06/msg00057.html (11,197 bytes)


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