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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+spark\s+gaps\s+\&\s+GDT\'s\s+for\s+lightning\/static\s+protection\s*$/: 6 ]

Total 6 documents matching your query.

1. [TowerTalk] spark gaps & GDT's for lightning/static protection (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Thu, 6 Apr 2017 12:29:57 -0700
I've seen pictures of all sorts of gaps, two wires almost touching, interlocking rings, adjacent spheres, Jacobs ladder like rods with tapered spacing , etc. One amateur radio product uses automotive
/archives//html/Towertalk/2017-04/msg00040.html (8,302 bytes)

2. Re: [TowerTalk] spark gaps & GDT's for lightning/static protection (score: 1)
Author: jimlux <jimlux@earthlink.net>
Date: Thu, 6 Apr 2017 14:35:37 -0700
On 4/6/17 12:29 PM, Grant Saviers wrote: I've seen pictures of all sorts of gaps, two wires almost touching, interlocking rings, adjacent spheres, Jacobs ladder like rods with tapered spacing , etc.
/archives//html/Towertalk/2017-04/msg00041.html (10,251 bytes)

3. Re: [TowerTalk] spark gaps & GDT's for lightning/static protection (score: 1)
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Sun, 9 Apr 2017 03:07:37 -0400
I'm assuming this is for open wire feed line? That brings up the question of the rig. Is it SS, or tube. Is the tuner link coupled, or with a transformer? Is there a direct path from the antenna "thr
/archives//html/Towertalk/2017-04/msg00051.html (11,770 bytes)

4. Re: [TowerTalk] spark gaps & GDT's for lightning/static protection (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Sun, 9 Apr 2017 10:45:22 -0700
No, the protection is for a 160m 90' high "T" with 8x 120' elevated radials in a mostly treed area. That's a lot of exposure to induced or trees to wires strikes. Since the elevated radials can't be
/archives//html/Towertalk/2017-04/msg00056.html (13,368 bytes)

5. Re: [TowerTalk] spark gaps & GDT's for lightning/static protection (score: 1)
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Sun, 9 Apr 2017 19:01:00 -0400
Agreed, lightning is an RF event and the feedpoint is probably the best place to start. My thoughts on the direct path to the amp, were not toward a DC event, it's just a lot easier for the residual
/archives//html/Towertalk/2017-04/msg00059.html (16,628 bytes)

6. Re: [TowerTalk] spark gaps & GDT's for lightning/static protection (score: 1)
Author: jimlux <jimlux@earthlink.net>
Date: Sun, 9 Apr 2017 17:25:34 -0700
My thoughts on the direct path to the amp, were not toward a DC event, it's just a lot easier for the residual voltage to traverse. I say residual voltage as reducing the potential to around 300 volt
/archives//html/Towertalk/2017-04/msg00060.html (11,833 bytes)


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