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41. Re: Topband: 1/2 wave inv L (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Sun, 18 Feb 2018 19:40:40 -0500
I've read that the minimum lengths for ground radials is no shorter than the height of the antenna and that 50% of ground losses occur in the first one-quarter wavelength distance from the antenna. T
/archives//html/Topband/2018-02/msg00114.html (10,539 bytes)

42. Re: Topband: Wednesday 160m DX Activity Night (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Thu, 22 Feb 2018 09:42:04 -0500
Roger G3YRO and a French station (F6AGM?) made it into the log. I heard several other EU stations with nice signals but did not work them as they were in QSO and my operating time was only during TV
/archives//html/Topband/2018-02/msg00161.html (10,889 bytes)

43. Re: Topband: TN5R to start tonight on TB (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Tue, 13 Mar 2018 08:13:03 -0400
Hello Jose No copy on you last night in PA using my E/NE BOG. 73 Mark K3MSB _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2018-03/msg00034.html (8,770 bytes)

44. Re: Topband: Anyone else hearing broadband digital signal intruder from 1905 to 1925 kHz? (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Sat, 24 Mar 2018 21:00:10 -0400
S5-6 on my NE BOG. S10+ on my INV-L. FM19ut @0055Z. 73 Mark K3MSB _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2018-03/msg00094.html (7,568 bytes)

45. Re: Topband: low inv-vee (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Thu, 29 Mar 2018 02:50:47 +0000
I don't think so. In my Electromagnetic Fields and Waves class in EE school (way back when dinosaurs just stopped roaming the earth and Constellations still graced the skies...) the prof derived the
/archives//html/Topband/2018-03/msg00119.html (9,588 bytes)

46. Re: Topband: Wednesday 160m DX Activity Night (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Thu, 29 Mar 2018 14:47:04 +0000
Rats. I was working on my Johnson Valiant last night and forgot it was 160 activity night. I have maybe 2 to 3 more weeks before the BOG and RBOG antennas get taken down as well as the INV-L radials
/archives//html/Topband/2018-03/msg00134.html (8,819 bytes)

47. Re: Topband: 160m polarization and elevation angles (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Thu, 29 Mar 2018 18:20:11 -0400
Carl I learned that polarization is not predictable after the first ionospheric bounce. 73 Mark K3MSB _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2018-03/msg00143.html (8,601 bytes)

48. Topband: My first VK on 160M! (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Sat, 31 Mar 2018 18:10:08 -0400
Huge day for me this morning.... After several years of trying, I worked my first VK on Top Band! Well, actually my first 2 Vks!! Ron VK3IO had the honors at about 1045Z. Here's a recording of him CQ
/archives//html/Topband/2018-03/msg00212.html (7,370 bytes)

49. Re: Topband: Wednesday Activity night (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Sun, 15 Apr 2018 19:18:04 -0400
Hi Roger All my 160M antennas have been taken down for mowing season. I plan to put up a NE/SW RBOG for the KH1 DXpedition. Instead of ground radials for the INV-L I plan on experimenting with a pair
/archives//html/Topband/2018-04/msg00094.html (6,922 bytes)

50. Topband: 160M INV-L with 2 Elevated Radials (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Sat, 14 Jul 2018 09:37:07 -0400
Greetings Fellow Night-Owls! My 160 meter antennas are typically put up in mid November and taken down at the end of March as my wife likes the grass mowed on a regular basis. The transmit antenna is
/archives//html/Topband/2018-07/msg00088.html (11,540 bytes)

51. Topband: Possible Spotlight Prop into Zones 17/18 ? (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Sat, 14 Jul 2018 10:09:42 -0400
Greetings I worked my first Zone 17 and Zone 18 stations last December within (about) an hour of each other. What interests me is that the bearing from me to those two stations were within 10 degrees
/archives//html/Topband/2018-07/msg00089.html (6,713 bytes)

52. Re: Topband: RE topband Leaving (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Wed, 5 Sep 2018 06:13:21 -0400
I had to go rummage around my Trash folder to find the original post that started this: From the FT8 arguments in addition to the "millennials causing the WWV shutdown" argument, it appears that the
/archives//html/Topband/2018-09/msg00048.html (19,749 bytes)

53. Re: Topband: Why no NA 160m Activity? (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Wed, 17 Oct 2018 14:07:49 -0400
For my case its pretty simple. As long as the grass is growing and needs mowed, no 160M antennas. Typically Nov 1 is when I do the last mowing, and it takes several weeks afterwards to get everything
/archives//html/Topband/2018-10/msg00077.html (7,443 bytes)

54. Re: Topband: Working LP from VK6 to the USA - season approaches (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Wed, 31 Oct 2018 15:25:49 -0400
Hi Steve I'd be delighted to take a crack at working you. Last April Phil VK6GX heard my CQ and answered me, but I was unable to hear him. I was beating my head against the table, and for some added
/archives//html/Topband/2018-10/msg00236.html (9,164 bytes)

55. Re: Topband: Condx on 160 (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Wed, 14 Nov 2018 13:21:27 -0500
Im about 160 miles NE of Jim WS6X and was on last night at the same time as he was. Like Jim, I had no problems working R3LA or LZ1PM. LZ1PM Was holding court for a long time last night! I barely had
/archives//html/Topband/2018-11/msg00089.html (8,657 bytes)

56. Re: Topband: Fwd: Re: Impedance of inv l? (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Sun, 18 Nov 2018 14:16:45 -0500
One of the reason you make an INV-L a bit longer is to address the capacitance you need to tune out the inductive reactance. Capacitance and capacitive reactance is an inverse relationship. See attac
/archives//html/Topband/2018-11/msg00174.html (8,923 bytes)

57. Re: Topband: use of WD-1 Military field phone wire for bog and/or beverage (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Fri, 23 Nov 2018 16:33:12 -0500
I used double runs of WD-1A for my RBOG last year and it worked nicely. For each run I combined the two wires of the WD-1A. 73 Mark K3MSB _________________ Searchable Archives: http://www.contesting.
/archives//html/Topband/2018-11/msg00239.html (9,618 bytes)

58. Topband: JAs on TopBand (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Sat, 22 Dec 2018 11:57:26 -0500
This morning was surreal..... I couldn't sleep so I got up around 0900Z, had a cup of coffee, read for a while, then went down to the shack. I worked 3D2AG on 80M CW and was listening to him put in a
/archives//html/Topband/2018-12/msg00222.html (8,785 bytes)

59. Re: Topband: Logikey K5 (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Tue, 22 Jan 2019 15:16:49 -0500
I've been using the Logikit CMOS 4 Electronic Keyer (the K5s little brother) for so long I cant remember when I got it. The only drawback is that the original buttons wear out; thats a known issue wi
/archives//html/Topband/2019-01/msg00083.html (7,480 bytes)

60. Re: Topband: ARRL on 1802.5 Tuesday PM (score: 1)
Author: Mark K3MSB <mark.k3msb@gmail.com>
Date: Fri, 25 Jan 2019 13:36:32 -0500
Eh? Details? _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
/archives//html/Topband/2019-01/msg00122.html (6,694 bytes)


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