- 1. [TowerTalk] Grounding mast? (score: 1)
- Author: jim Jarvis <jimjarvis@optonline.net>
- Date: Wed, 30 Jul 2008 07:06:04 -0400
- Been following the SteppIR v. Stepper.IT thread while travelling. Had a few minutes to browse both websites, this morning, and came across a short commentary about lightning and ESD protection for th
- /archives//html/Towertalk/2008-07/msg00815.html (7,228 bytes)
- 2. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: "Mel Whitten" <mel@melwhitten.com>
- Date: Wed, 30 Jul 2008 08:36:35 -0500
- Yes. I use a large copper welding cable to "jumper" around the prop-pitch. This cable is over half inch in diameter and has many strands so it is very flexible. I've used it for about 5 years. Mel, K
- /archives//html/Towertalk/2008-07/msg00817.html (7,891 bytes)
- 3. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: K4SAV <RadioIR@charter.net>
- Date: Wed, 30 Jul 2008 08:36:46 -0500
- N2EA wrote: ...Points out lack of conductivity across rotors, and asserts 300-500V per meter above ground as the possible potential buildup. ... Did you mean across the balun, or between floating ele
- /archives//html/Towertalk/2008-07/msg00818.html (10,293 bytes)
- 4. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Wed, 30 Jul 2008 07:28:37 -0700
- A current balun (common mode choke) has DC continuity and looks moderately inductive at broadcast frequencies, which is where most lightning energy is concentrated. Thus, a SLOW buildup of static cha
- /archives//html/Towertalk/2008-07/msg00819.html (7,268 bytes)
- 5. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: "N2TK" <tony.kaz@verizon.net>
- Date: Wed, 30 Jul 2008 08:12:04 -0700
- I found I had some intermittent changes in SWR on 160M (shunt feeding the tower). I put a grounding strap from the mast to the top of the tower (across the TB-3). SWR has been stable since. Have not
- /archives//html/Towertalk/2008-07/msg00820.html (9,134 bytes)
- 6. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: "Matthew Steven" <kd0bvk@gmail.com>
- Date: Wed, 30 Jul 2008 11:52:00 -0500
- That's very interesting to me. I used to get zapped pretty hard back when I used to have a fiberglass vertical up in the air that was not commonly grounded and I'd connect it to my old radio. (one ha
- /archives//html/Towertalk/2008-07/msg00823.html (7,705 bytes)
- 7. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
- Date: Wed, 30 Jul 2008 13:17:20 -0400
- Static charges build up in ran, snow, or just a dry wind. This is highly unlikely. Measure the resistance from top to bottom of a rotator just sitting there. It should appear as zero or close to it.
- /archives//html/Towertalk/2008-07/msg00824.html (10,159 bytes)
- 8. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: hdmc38@bellsouth.net
- Date: Wed, 30 Jul 2008 18:59:31 +0000
- Jim NEC Chapter 8 requires a separate ground from the mast, down the tower to the ground rod. Since the mast is above the rotor that's where it is connected. I'm not saying it works better or worse.S
- /archives//html/Towertalk/2008-07/msg00826.html (9,732 bytes)
- 9. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
- Date: Wed, 30 Jul 2008 16:08:45 -0400
- It certainly would not be a bad idea but that would be an interesting proposition as a good electrical ground would be heavy enough to create problems when turning the mast. Nor would you be able to
- /archives//html/Towertalk/2008-07/msg00827.html (9,964 bytes)
- 10. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Wed, 30 Jul 2008 13:27:43 -0700
- The word "separate" is unfortunate and out of place. NEC does NOT allow SEPARATE grounds -- it requires that all premises ground electrodes be bonded together. If we have one ground for our station a
- /archives//html/Towertalk/2008-07/msg00828.html (8,662 bytes)
- 11. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: K4SAV <RadioIR@charter.net>
- Date: Wed, 30 Jul 2008 15:54:11 -0500
- K9YC wrote: "A current balun (common mode choke) has DC continuity ......" Some baluns built are like that. The subject starting this thread was the SteppIR balun. That is a 25 to 50 ohm balun which
- /archives//html/Towertalk/2008-07/msg00829.html (9,113 bytes)
- 12. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: K4SAV <RadioIR@charter.net>
- Date: Wed, 30 Jul 2008 16:23:10 -0500
- N2TK wrote ...."Even without grounding the elements I can move the SWR on 160 all over the place with running the elements in and out on the MonstIR."..... That would agree with NEC simulation. Even
- /archives//html/Towertalk/2008-07/msg00830.html (9,651 bytes)
- 13. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: Richards <jruing@ameritech.net>
- Date: Wed, 30 Jul 2008 23:34:50 -0400
- Perhaps it is your electrifying personality? Or your magnetic personality? Simply shocking! == Anonymous == -- _______________________________________________ ________________________________________
- /archives//html/Towertalk/2008-07/msg00836.html (8,242 bytes)
- 14. Re: [TowerTalk] Grounding mast? (score: 1)
- Author: hdmc38@bellsouth.net
- Date: Thu, 31 Jul 2008 21:51:33 +0000
- You are correct Jim My apoligies for using the word separte in a SPG system. Very well put.Thanks. 73 Joe K4XZ -- JOE PATRICK SENIOR PLUMBING/MECHANICAL INSPECTOR CITY OF BOYNTON BEACH ______________
- /archives//html/Towertalk/2008-07/msg00844.html (9,959 bytes)
This search system is powered by
Namazu