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Total 147 documents matching your query.

61. Re: Topband: OT - US Hams, WWV closure (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Wed, 22 Aug 2018 18:31:41 -0500
I've heard Fed. Gov't burns through $6 Mil. every minute (maybe it's every second). In the time it took to read this far, Bam another $6 million. Sure there are lots of dinky things the U.S. blows m
/archives//html/Topband/2018-08/msg00122.html (8,951 bytes)

62. Re: Topband: Radial wire (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Wed, 5 Sep 2018 15:27:35 -0500
Oh man, any time this topic comes up anywhere the guys come out with all kinds of suggestions for wire that won't last like galvanized steel and electric fence wire. Nix nix nix...if you want a perma
/archives//html/Topband/2018-09/msg00063.html (8,358 bytes)

63. Re: Topband: Radial wire (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 10 Sep 2018 10:58:26 -0500
Big difference between wire on fence and buried. I've mistakenly installed galvanized steel ground rods here. Pulling them back out 10 years later they were nothing but rust and useless. The surface
/archives//html/Topband/2018-09/msg00082.html (8,809 bytes)

64. Re: Topband: RG6 connectors and installation (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 29 Oct 2018 08:29:19 -0500
Don't re-invent the wheel. There are cable installers all over the place--these are people who are given the tools and connectors by Comcast and other big companies to make high reliability installat
/archives//html/Topband/2018-10/msg00230.html (7,157 bytes)

65. Re: Topband: 160m Condx (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Tue, 13 Nov 2018 12:19:49 -0600
This only started with plastic radios and digital displays and got worse with dial resolution down to one cycle. Back when everyone had VFOs like the HA-5 with dial markers only every 50 kc no one e
/archives//html/Topband/2018-11/msg00074.html (8,046 bytes)

66. Re: Topband: Impedance of inv l? (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 19 Nov 2018 09:58:31 -0600
My inv. L is 50 feet up and 70 horizontal. Wire is #14 bare 7 strand hard drawn. 3 feet out from mast. 101 radials, two ground rods and aluminum siding on garage strapped in to ground sys. on around
/archives//html/Topband/2018-11/msg00185.html (8,104 bytes)

67. Re: Topband: Rather use N-type (was Re: The answer to PL-259 (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Sat, 8 Dec 2018 07:59:19 -0600
It depends on the duty cycle, length of transmission and vswr. Brief contester type transmissons at 50% d/c into a load with Z = line characteristic Z is probably okay. AM broadcasting 1 KW carrier
/archives//html/Topband/2018-12/msg00105.html (8,757 bytes)

68. Re: Topband: Rather use N-type (was Re: The answer to PL-259 (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Tue, 11 Dec 2018 12:00:33 -0600
Some of you fellows who want to use Ns may benefit from this hint and kink: https://www.radioworld.com/columns-and-views/repair-and-protect-type-n-connectors Rob K5UJ _________________ Searchable Arc
/archives//html/Topband/2018-12/msg00139.html (8,517 bytes)

69. Re: Topband: Inverted L improvement question (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Wed, 19 Dec 2018 08:13:06 -0600
If your inverted L is any good at all it will suck as a receiving antenna. This is one of the key things to accept about medium wave but many casual 160 m. operators can't wrap their heads around it.
/archives//html/Topband/2018-12/msg00188.html (9,752 bytes)

70. Topband: RF in the DX Eng. NCC-1 (and a fix) (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 24 Dec 2018 05:29:46 -0600
Merry Christmas and Happy New Year: On 160 m. (probably due to the close proximity to my inverted L) my NCC-1 rx antenna phasing box would snap crackle and pop on transmit, most likely the result of
/archives//html/Topband/2018-12/msg00246.html (7,355 bytes)

71. Re: Topband: Inverted L improvement question - Part 2 (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Sun, 30 Dec 2018 08:51:51 -0600
Hmmm....you DID relocate or rebuild your ground system so it converges on a point below the bottom of the 100 foot tall wire right? I mean, you aren't using the 43 foot vert. ground system with the 1
/archives//html/Topband/2018-12/msg00332.html (9,202 bytes)

72. Re: Topband: Inverted L improvement question (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 7 Jan 2019 18:59:58 -0600
Your fundamental problem is a lack of understanding of how a monopole works, specifically a base fed vertical with a ground system. Anyone who tries to use a ground system that converges on a point
/archives//html/Topband/2019-01/msg00010.html (8,321 bytes)

73. Re: Topband: Lack of Activity (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Fri, 15 Feb 2019 15:59:24 -0600
There's activity and then there's "activity." I take it that "activity" in this discussion really means DX. It so happens that there's other kinds of operating going on on 160 m. besides DX chasing i
/archives//html/Topband/2019-02/msg00143.html (8,419 bytes)

74. Topband: Voltage at top of vertical and scaling? (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Thu, 18 Apr 2019 05:25:37 -0500
I'd also put RF chokes in series with the DC relay lines, at the base of the vertical antenna to further keep RF off it but also to break it up so the relay line doesn't detune the 80 m. vertical, pe
/archives//html/Topband/2019-04/msg00088.html (8,515 bytes)

75. Topband: FT-8 My Recent Experience (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Wed, 29 May 2019 07:57:01 -0500
Same here. Computer science major; 30 years in front of monitors and keyboards all day; database management, writing code....and I know hams who spend days and days fiddling with PCs and logging sof
/archives//html/Topband/2019-05/msg00100.html (7,527 bytes)

76. Re: Topband: RFI on TB (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Tue, 23 Jul 2019 08:37:16 -0500
I would not use an inverted L for receiving. Unusable for rx at my QTH but FB for transmitting. 73 Rob K5UJ _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflec
/archives//html/Topband/2019-07/msg00068.html (6,781 bytes)

77. Re: Topband: RFI on TB (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Thu, 25 Jul 2019 07:43:43 -0500
Yes under certain circumstances using the tx antenna is okay for rx, the most obvious example being local communications with a ham a few miles away. But I don't know of any serious 160 m. operator
/archives//html/Topband/2019-07/msg00081.html (8,706 bytes)

78. Re: Topband: inverted l (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 2 Sep 2019 07:00:43 -0500
If you have a properly constructed typical inverted L, i.e. 50 or 60 foot vertical and similar length horizontal, AND a good ground system serving as the other half of the antenna, your feedpoint Z w
/archives//html/Topband/2019-09/msg00019.html (8,382 bytes)

79. Re: Topband: Furnace RFI (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Fri, 4 Oct 2019 05:43:05 -0500
Went through this about 2 years ago. Firstly, define "efficient." If you mean over 90%, as in one of those two stage furnaces with PVC handling moisture then you are consigned to having to use a vari
/archives//html/Topband/2019-10/msg00004.html (7,806 bytes)

80. Re: Topband: spark gap construction ideas for 160m tower (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Sun, 6 Oct 2019 19:08:17 -0500
There are a number of ways of making a ball gap. but more important is arriving at the correct spacing for the gap. The way rain is handled is usually by positioning the balls one above the other so
/archives//html/Topband/2019-10/msg00022.html (7,850 bytes)

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