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1. Topband: Suggestions for vertical at HG0R (score: 1): Author: Steve HA0DU <ha0du@dx.hu>; Date: Sat, 7 Nov 2020 16:07:49 +0100; HI All, Today we finished installing a vertical with a top hat at HG0R, but it is not perfect (yet). The vertical part is about 20.5m (67 ft) tall, starts with 10m of 50mm (2") pipe at the bottom, an; /archives//html/Topband/2020-11/msg00038.html (8,687 bytes)
2. Re: Topband: Suggestions for vertical at HG0R (score: 1): Author: Dave Cuthbert <telegrapher9@gmail.com>; Date: Sat, 7 Nov 2020 05:49:21 -1000; Steve, *I believe there is a measurement error. * 1. The reactive part of the input impedance should not become more inductive as the frequency is decreased. 1904kHz --> Z=68.1 + j0.3 and 1844kHz -->; /archives//html/Topband/2020-11/msg00039.html (9,542 bytes)
3. Re: Topband: Suggestions for vertical at HG0R (score: 1): Author: Grant Saviers <grants2@pacbell.net>; Date: Sat, 7 Nov 2020 09:24:47 -0800; I agree with Dave's comments based on measurements and modeling of two different similarly sized top loaded verticals. Grant KZ1W *I believe there is a measurement error. * 1. The reactive part of th; /archives//html/Topband/2020-11/msg00040.html (9,832 bytes)
4. Re: Topband: Suggestions for vertical at HG0R (score: 1): Author: Mail 10 <mail10@barefoothorse.com.au>; Date: Sun, 8 Nov 2020 11:45:40 +1100; You can also alter the resonance by changing the slope of the top hat wires. If you can make them more horizontal, this will slightly lower the resonant frequency. Either make them tighter or move th; /archives//html/Topband/2020-11/msg00042.html (9,726 bytes)

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