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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Top\s+Hat\s+Switch\s+$mercury$\s*$/: 14 ]

Total 14 documents matching your query.

1. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: ford@cmgate.com (Ford Peterson); Date: Wed, 18 Jul 2001 21:54:22 -0500; Many people have responded to my previous post. All responses were quite valid and appreciated--thank you. The consensus was to simply cut it for 75 meters and base load it with a variable inductor a; /archives//html/Towertalk/2001-07/msg00288.html (9,990 bytes)
2. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: n4kg@juno.com (n4kg@juno.com); Date: Wed, 18 Jul 2001 21:56:06 -0600; What's going to keep the snow off the top hat / switch / top of vertical? You really don't need a roller inductor at the base, just switch a fixed inductor (which you pretune). If you don't like indu; /archives//html/Towertalk/2001-07/msg00290.html (12,787 bytes)
3. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: rhodes@evertek.net (Jim Rhodes); Date: Wed, 18 Jul 2001 23:36:06 -0500; Have you considered an arrangement to switch between alternate feedpoints at the bottom of the antenna. Insulate the botom 3.4 - 4 ft of the tubing & use relays to switch between the lower section wh; /archives//html/Towertalk/2001-07/msg00291.html (11,929 bytes)
4. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 19 Jul 2001 05:08:44 -0400; Hi Ford, Voltage breakdown varies greatly with shape and rate of change in the electric field between the two conductors. I think the number you saw is for a uniformly distributed electric field and; /archives//html/Towertalk/2001-07/msg00293.html (9,348 bytes)
5. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 19 Jul 2001 11:54:36 +0200; The many thousands KVs developed at the edge of a vertical aren't manageable other than with a big glass or porcelain insulator and a knife contactor, just likewise it's used to sectionalize along hi; /archives//html/Towertalk/2001-07/msg00294.html (12,592 bytes)
6. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: tao@skypoint.com (Tod Olson); Date: Thu, 19 Jul 2001 06:30:55 -0600; There have been some interesting cautions put forth on this topic in the past few days. Without no disrespect intended, I wonder if we haven't identified most of the challenges to switching in a segm; /archives//html/Towertalk/2001-07/msg00295.html (9,387 bytes)
7. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: jreisert@jlc.net (Joe Reisert); Date: Thu, 19 Jul 2001 09:25:56 -0400; Ford, Have you contacted any of the people that used the Colatchco verticals in the 1980's? If I am not mistaken, they had a version that used a switch. Perhaps their experience would help. 73, Joe,; /archives//html/Towertalk/2001-07/msg00296.html (11,898 bytes)
8. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 19 Jul 2001 09:44:08 -0400; You may have missed it Tod, but two solutions were given and rejected. 1.) The suggestion was offered and a working example given (along with a history of actual problems) of using a latching vacuum; /archives//html/Towertalk/2001-07/msg00297.html (9,742 bytes)
9. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: K3BU@aol.com (K3BU@aol.com); Date: Thu, 19 Jul 2001 10:26:33 EDT; Maybe I missed something, but what about using simple trap? Trap isolates or "disconnects" rest of the radiator above trap. They can be made efficient. The disadvantage is they are frequency specific; /archives//html/Towertalk/2001-07/msg00298.html (9,049 bytes)
10. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Thu, 19 Jul 2001 19:36:05 +0200; A classical parallel resonant trap can be made resonant and isolating at a frequency but shows inductive reactance at lower ones. You can isolate the top hat on 40 with a trap, but then you can't use; /archives//html/Towertalk/2001-07/msg00302.html (10,801 bytes)
11. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: tao@skypoint.com (Tod Olson); Date: Thu, 19 Jul 2001 11:56:06 -0600; You are correct Tom, your solution #1 does deal with the 'how to successfully switch" the top hat. I have no issue with the fact that solution #2 does provide dual frequency operation, but I don't th; /archives//html/Towertalk/2001-07/msg00303.html (10,289 bytes)
12. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: K7GCO@aol.com (K7GCO@aol.com); Date: Thu, 19 Jul 2001 15:34:30 EDT; << Many people have responded to my previous post. All responses were quite valid and appreciated--thank you. The consensus was to simply cut it for 75 meters and base load it with a variable inducto; /archives//html/Towertalk/2001-07/msg00305.html (13,431 bytes)
13. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: n4kg@juno.com (n4kg@juno.com); Date: Thu, 19 Jul 2001 11:23:26 -0600; I know traps work reasonably well if the frequency ratio is 1.5 or more. How well do traps work for a small ratio? 3.5 to 3.8 is only 1.1 Tom N4KG ____________________________________________________; /archives//html/Towertalk/2001-07/msg00309.html (10,452 bytes)
14. [TowerTalk] Top Hat Switch (mercury) (score: 1): Author: n1lo@hotmail.com (Mark .); Date: Fri, 20 Jul 2001 08:03:35 -0400; How about building a knife or rocker switch at the top that operates like a see-saw, and drop two ropes to the ground from it. Pulling on one rope closes the switch and connects your hat. Pulling the; /archives//html/Towertalk/2001-07/msg00313.html (8,901 bytes)

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