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41. Re: Topband: RX / TX antenna switching (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Thu, 22 Sep 2016 20:33:20 +0000
ea6vq_ml@dxmaps.com ________________________________ Gabriel, View two products from MFJ enterprises, MFJ-1707 and MFJ-1708. 73, Charles, W2SH ** I will appreciate your advice in the best (but simple
/archives//html/Topband/2016-09/msg00069.html (8,833 bytes)

42. Re: Topband: BOG (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Mon, 17 Oct 2016 03:19:41 +0000
Thanks Lloyd, But pls tell us your wire height and approximate description of gnd condx for your otherwise well-described bog. 73, Charles W2SH Hello Tony! Ground conditions and wire height above gro
/archives//html/Topband/2016-10/msg00089.html (8,999 bytes)

43. Re: Topband: inv. L (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Thu, 20 Oct 2016 21:33:56 +0000
Before putting any kind of tape, gunk or goo on a fitting or soldered connection with the expectation of weatherproofing it in an outdoor environment, I ALWAYS do this first: I wrap the item with two
/archives//html/Topband/2016-10/msg00121.html (11,436 bytes)

44. Topband: Fw: 160 m inverted L (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Tue, 8 Nov 2016 17:34:35 +0000
An advantage of having the total length of the inverted L antenna at greater than 0.25 wavelength is that matching to coax at its base can be achieved with just a capacitor in series between the cent
/archives//html/Topband/2016-11/msg00034.html (13,649 bytes)

45. Re: Topband: RBOG - wire fence (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Sun, 18 Dec 2016 16:23:16 +0000
The two big-box home improvement stores carry more expensive, heavy-duty garden hose, some with 5/8" and maybe 3/4" IDs. that might be used to protect a moderately long run of coax. I have some galva
/archives//html/Topband/2016-12/msg00194.html (9,704 bytes)

46. Re: Topband: 160 meter 1/4 vertical (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Mon, 3 Jul 2017 22:09:31 +0000
The free-space pattern of current in a vertical (and also horizontal) antenna is crescent shaped with its maximum at the midpoint, and a minimum at each end. It shows nothing that could be termed an
/archives//html/Topband/2017-07/msg00004.html (11,368 bytes)

47. Re: Topband: 160 meter 1/4 vertical (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Tue, 4 Jul 2017 20:04:50 +0000
My earlier message should properly have read, "The free-space pattern of current in a HALF WAVELENGTH vertical (and also horizontal) antenna..." Charles, W2SH Forget about the high impedance issues o
/archives//html/Topband/2017-07/msg00013.html (10,706 bytes)

48. Re: Topband: RF choke/balun (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Sun, 17 Sep 2017 01:42:52 +0000
That could be true, but for several years my inverted L (86 feet up and 68 feet out, over 1.5 miles of in-ground radials) is significantly less noisy on receive than my 270-foot center-fed dipole slo
/archives//html/Topband/2017-09/msg00049.html (9,259 bytes)

49. Re: Topband: WKYW on 1810kc (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Wed, 10 Jan 2018 23:33:13 +0000
30 miles west of NYC, their carrier is S9 plus 25 dB with music faintly audible. This on an inverted L. Charles, W2SH Is anyone copying a AMBC stn around 1810kc. They are 30db over S9 here. The sig w
/archives//html/Topband/2018-01/msg00080.html (9,307 bytes)

50. Re: Topband: [TowerTalk] 160 vertical question (Top Hat) (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Tue, 6 Feb 2018 22:54:44 +0000
Yes, the maximum quantity of total current in the vertical section of an inverted T, or inverted L antenna is achieved when the antenna's current loop is placed at the center of the vertical leg. As
/archives//html/Topband/2018-02/msg00056.html (10,690 bytes)

51. Re: Topband: 1/2 wave inv L (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Sun, 18 Feb 2018 23:42:35 +0000
Years ago I tried a a weather balloon filled with hydrogen from a hired canister. The balloon's spherical shape made it highly susceptible to being disturbed by even a fairly mild breeze. In my case
/archives//html/Topband/2018-02/msg00111.html (9,528 bytes)

52. Re: Topband: 1/2 wave inv L (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Sun, 18 Feb 2018 23:56:16 +0000
Well it is understandable. The current maximum in the half-wave antenna is lifted well above ground level. Had there been a radial system it would have had to employ very long radials, for most of th
/archives//html/Topband/2018-02/msg00113.html (9,644 bytes)

53. Re: Topband: 1/2 wave inv L (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Mon, 19 Feb 2018 03:14:43 +0000
That is probably true but ONLY for an antenna that is 0.25 wavelength high where the current maximum is at the base feedpoint, right where those radials, also the same 0.25 wavelength in their length
/archives//html/Topband/2018-02/msg00115.html (12,541 bytes)

54. Re: Topband: Adding chicken wire or mesh on top of radial field (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Tue, 5 Jun 2018 20:15:05 +0000
Another choice, and one more durable than the zinc-dipped steel of chicken fencing, and probably less expensive than copper mesh, is rabbit/deer fencing. This is available in different gauges and dif
/archives//html/Topband/2018-06/msg00013.html (9,339 bytes)

55. Re: Topband: Radials in the desert (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Wed, 20 Jun 2018 20:11:12 +0000
The function of radials is to collect the radiation from your antenna that splashes on the ground and deliver it back to the antenna feedpoint for recycling. As such, if you decide to trench into the
/archives//html/Topband/2018-06/msg00119.html (10,110 bytes)

56. Re: Topband: Radial plate (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Sun, 1 Jul 2018 23:14:33 +0000
With in-ground, which optimally should be be so shallow as to be on-ground, radials there's no thought or effort needed to think about them as being anything close to the intended radiation frequency
/archives//html/Topband/2018-07/msg00005.html (10,202 bytes)

57. Re: Topband: OT - US Hams, WWV closure (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Mon, 20 Aug 2018 03:17:57 +0000
David, Like you I support the petition. However, I will lend my name to it because I don't want to selfishly chicken out for all the valid reasons you note. Heck, it was only last week that Medicare,
/archives//html/Topband/2018-08/msg00100.html (10,674 bytes)

58. Re: Topband: tennis ball launcher for antennas (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Thu, 29 Nov 2018 03:24:48 +0000
Wayne, Ditch the idea of using the tennis ball launcher. Neither it nor the Zebco spinning reel will solve your problem which is basically to get your projectile to reach the target but not go much f
/archives//html/Topband/2018-11/msg00316.html (11,834 bytes)

59. Topband: Fw: Dacron & varmits (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Tue, 18 Feb 2020 23:20:35 +0000
I have for years used the polyester (Dacron is a polyester branded by the Dupont company) products of Synthetic Textiles of Anaheim CA. They sell directly to hams if you buy enough length. Shorter le
/archives//html/Topband/2020-02/msg00174.html (12,999 bytes)

60. Re: Topband: T Top Verticals and yagis (score: 1)
Author: Charles Moizeau <w2sh@msn.com>
Date: Sun, 1 Mar 2020 22:46:50 +0000
I would prefer to have the horizontal radiation canceled by using an inverted T, but I haven't discovered a workable configuration to achieve that. Therefore I use an inverted L with a vertical leg o
/archives//html/Topband/2020-03/msg00002.html (9,918 bytes)

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