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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+Top\s+Loading\s+Advice\s*$/: 6 ]

Total 6 documents matching your query.

1. Topband: Top Loading Advice (score: 1)
Author: "Chortek, Robert L." <Robert.Chortek@berliner.com>
Date: Sun, 17 Mar 2019 22:01:54 +0000
Fellow Topbanders, I just finished replacing my damaged base loaded vertical and have a question about the optimum amount of top loading. A bit of background - my new vertical is a 55' #12 wire suppo
/archives//html/Topband/2019-03/msg00058.html (8,300 bytes)

2. Re: Topband: Top Loading Advice (score: 1)
Author: "Clive GM3POI" <clive@gm3poi.com>
Date: Sun, 17 Mar 2019 18:48:45 -0500
Bob, You should lengthen the two top loading wires so that the basic resonance of the vertical is about 1.9mhz. Then add a Hairpin coil across the feed point and adjust it/ top loading to place the m
/archives//html/Topband/2019-03/msg00061.html (9,158 bytes)

3. Re: Topband: Top Loading Advice (score: 1)
Author: "Clive GM3POI" <clive@gm3poi.com>
Date: Sun, 17 Mar 2019 18:55:39 -0500
Bob, I should have added that you would increase the performance of the antenna if you could find a way to raise the ends of the top loading by the same amount on each side, this will raise the feed
/archives//html/Topband/2019-03/msg00062.html (8,678 bytes)

4. Re: Topband: Top Loading Advice (score: 1)
Author: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Sun, 17 Mar 2019 16:35:57 -0700
If you model it, there will be a length that maximizes the radiation resistance, and that will be in the neighborhood of 1/3 of the height. They are already too long. Plan on using a base inductor to
/archives//html/Topband/2019-03/msg00065.html (9,708 bytes)

5. Re: Topband: Top Loading Advice (score: 1)
Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: Sun, 17 Mar 2019 21:42:06 -0400
Robert, I would leave it as it is. I have experimented a lot with sloping top-loading wires and found that 12 - 14 meters (~40') is about right with a 55' vertical section. The only thing I would do
/archives//html/Topband/2019-03/msg00067.html (9,382 bytes)

6. Topband: Top Loading Advice (score: 1)
Author: W7RH <midnight18@cox.net>
Date: Tue, 19 Mar 2019 03:55:11 +0000
Bob, N6RK and AA7JV/C6AGU are both on the right track. I lean with adding more radials and feeding with a 12.5Ohm Un-UN. In that respect you can add relay taps on the loading coil and go entire band
/archives//html/Topband/2019-03/msg00075.html (7,312 bytes)

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