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61. [Towertalk] sixpack relay problem (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Wed, 19 Jun 2002 07:11:35 -0400
The most common problem (by far) seen at Ameritron and other companies that use relays in hard-wired applications is flux contamination of contacts. It's pretty tough to get a high-resistance connec
/archives//html/Towertalk/2002-06/msg00292.html (8,748 bytes)

62. [Towertalk] sixpack relay problem (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Wed, 19 Jun 2002 17:37:46 -0400
First, most people just do not understand how difficult it is to use large heavy contacts to switch weak signals with any reliability. EVERY manufacturer fights that problem, unless they use very sp
/archives//html/Towertalk/2002-06/msg00308.html (8,967 bytes)

63. [Towertalk] Beverage Radials (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Sun, 23 Jun 2002 19:12:05 -0400
I either use multiple ground rods spaced several feet apart or a single rod and at least two radials on my beverages. I've found that when it gets really dry, the ground resistance of a single groun
/archives//html/Towertalk/2002-06/msg00350.html (7,440 bytes)

64. [Towertalk] Guy wire resonance. Break it up or use stubs? (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Tue, 25 Jun 2002 06:51:01 -0400
I just modelled a two element phased array, and adding a "nonresonant" wire right in the middle of a recommended "safe length" 1/8 wl below the phased array center decreased the null from almost inf
/archives//html/Towertalk/2002-06/msg00376.html (9,714 bytes)

65. [Towertalk] Antenna Analyzer Suggestions? (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Sun, 5 May 2002 22:00:18 -0400
While it is big and heavy, it has an aluminum case. As for batteries...anyone who uses dry cells in this day and age deserves to pay for batteries! 90% of the battery current goes to RF output, whic
/archives//html/Towertalk/2002-05/msg00115.html (9,923 bytes)

66. [Towertalk] Lightning Protection - Conclusion (for me, anyway) (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Tue, 14 May 2002 22:15:03 -0400
Grounding and lead layout, IMO that is the key. I have miles of coax and miles of wires spread over a large area, and the tallest tower is over 300 feet tall. The 2-meter metal dipole array at the t
/archives//html/Towertalk/2002-05/msg00372.html (9,397 bytes)

67. [Towertalk] More on Lightning protection (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Tue, 14 May 2002 22:15:01 -0400
The only known way to reduce the probability of a lightning hit by "bleeding off" charge is by sending a streamer of ions up to the cloud...since it is the cloud that actually has the concentrated c
/archives//html/Towertalk/2002-05/msg00373.html (9,591 bytes)

68. [Towertalk] Lightning Protection - Conclusion (for me, anyway) (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Wed, 15 May 2002 22:10:37 -0400
The best place for the suppressor, if you feel them necessary, is at the house end of things....not at the tower. Keep in mind what the suppressor does, it simply ties the center to the shield when
/archives//html/Towertalk/2002-05/msg00406.html (10,369 bytes)

69. [Towertalk] Lightning Protection (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Wed, 15 May 2002 22:32:52 -0400
Yes, there is an excellent chance! First of all, remember that the the polyphaser, like any other discharge device or gap, must have significant center-to-shield voltage to fire. It also does absolu
/archives//html/Towertalk/2002-05/msg00408.html (10,476 bytes)

70. [Towertalk] Lightning Protection (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Thu, 16 May 2002 10:19:44 -0400
I always use air core solenoid chokes when leaving a problem area, like the bottom of my 300 ft tower. Broadcast stations with insulated towers often do something similar, even if it is just a big o
/archives//html/Towertalk/2002-05/msg00421.html (8,342 bytes)

71. [CQ-Contest] Re: [Towertalk] More on Lightning protection (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Thu, 16 May 2002 10:19:43 -0400
Even lightning doesn't move around as much as this thread. Since the cloud is the primary concentration point of charge, there is very little you can do about it except to have something discharge th
/archives//html/Towertalk/2002-05/msg00422.html (9,477 bytes)

72. [Towertalk] Dayton declining... (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Fri, 24 May 2002 07:06:58 -0400
It isn't a promotional or license requirement problem, it is a social change. All technical or skilled hobbies are declining at a rapid rate with younger people, from automotive interests to radios.
/archives//html/Towertalk/2002-05/msg00659.html (8,338 bytes)

73. [Towertalk] Ham friendly CC&Rs? (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Sat, 25 May 2002 00:11:04 -0400
Hams often tell me I'm not "allowed" to have a 300-foot without FCC permission, and even claim I should "ask FCC permission" every time I install a new amateur antenna on my registered structure, or
/archives//html/Towertalk/2002-05/msg00681.html (8,080 bytes)

74. [Towertalk] There are no dumb questions on Tower Talk, only dumb answerrs! (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Tue, 28 May 2002 22:57:05 -0400
Contrary to folklore and wive's tales that claim silly things like "0.5dB per splice" or other such nonsense, connectors can be considered lossless at HF. Another bit of folklore is that an S-unit i
/archives//html/Towertalk/2002-05/msg00748.html (9,959 bytes)

75. [Towertalk] Really dumb question on coax (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Wed, 29 May 2002 06:06:15 -0400
It's easy to put such claims to a "smell test". 1-2dB loss and 1500 watts the power loss would be between 150 and 350 watts in the connector. A reasonable test would be to run 500-1500 watts for a f
/archives//html/Towertalk/2002-05/msg00760.html (9,568 bytes)

76. [Towertalk] RCS-4 (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Thu, 30 May 2002 06:02:53 -0400
The revised new RCS-4 with sealed relays is very good to 50 Mhz. That is wrong also, so some adv or catalog must be wrong. The RCS-8V is good to 250MHz, not 450MHz.73, Tom W8JI W8JI@contesting.com
/archives//html/Towertalk/2002-05/msg00798.html (6,741 bytes)

77. [Towertalk] Feedback on W9INN Antennas Wanted (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Thu, 30 May 2002 10:28:20 -0400
1/4wl slopers ALL depend on the tower impedance at the connection point to be very low...otherwise you will have SWR problems you won't be able to cure. Because they depend so much on whatever else
/archives//html/Towertalk/2002-05/msg00810.html (8,567 bytes)

78. [Towertalk] Coax Connecter Losses - Dose anyone know? (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Thu, 30 May 2002 10:43:16 -0400
Rich, I measure things like this from time to time. I understand it is difficult, in the face of so many silly rumors and false claims, to accept the fact that virtually all connectors have negligib
/archives//html/Towertalk/2002-05/msg00812.html (8,158 bytes)

79. [Towertalk] Air Terminal Placement (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Thu, 30 May 2002 20:15:13 -0400
Hi Jeff, Be sure to include a rabbit's foot, it will probably reduce the chances of a lightning hit as much as the "air terminal"...and costs less (except to the rabbit). Like other person said, the
/archives//html/Towertalk/2002-05/msg00832.html (8,231 bytes)

80. [Towertalk] W9INN Broadband 160/80/40 (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Thu, 30 May 2002 20:15:14 -0400
Hi dave, I'm confused by this. If it is a dual-sloper isolated from the tower, then it is really a dipole or a bent-up Inverted V dipole isn't it? To be "tower independent" would require two wires ma
/archives//html/Towertalk/2002-05/msg00833.html (8,182 bytes)


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