I have an HF-2V with 32 - 40 foot radials under it. My bandwidth on 80 was
about 30kc's until I did the top hat mod. Now it's more like 80 or 90kc's.
Mike - KI8R
On Tue, Oct 25, 2016 at 3:35 PM, Tom_N2SR via TowerTalk <
towertalk@contesting.com> wrote:
> Go back and read K9YC's articles about many short radials close to the
> feedpoint. Isn't the idea to reduce/eliminate losses?
> When I added added the HF2V, I had about 4 radials and the BW on 80 was
> about 150 kc. I kept adding radials, and the bandwidth kept dropping -
> which is good, since that means that that ground losses are being reduced.
>
> The bandwidth finally dropped to about 50 kHz. For an 1/8 wave antenna,
> that is pretty good.
> Tom, N2SR
> PS: How about a link to the arrl's mast calculator?
> From: Jim Thomson <jim.thom@telus.net>
> To: towertalk@contesting.com
> Sent: Monday, October 24, 2016 7:20 PM
> Subject: [TowerTalk] What do do on 80 when height restricted?
>
> Date: Mon, 24 Oct 2016 19:40:06 +0000 (UTC)
> From: Tom_N2SR <tom_n2sr@yahoo.com>
> To: "towertalk@contesting.com" <towertalk@contesting.com>
> Subject: Re: [TowerTalk] What do do on 80 when height restricted?
>
> I second (or third) the HF2V. ? I had one up with about 60 radials for
> about 6 years. ?Before I put it up, I had less than 30 countries on 40 and
> 80. ?When I took it down I had 240 countries on 40 and 185 countries on 80.
> ?
> I was even able to create a switching scheme to switch resonances between
> cw and ssb. ?
> Tom, N2SR
>
> ## and how do you install 60 x long radials on a city lot ? Even if
> the vert is elevated, the radials then HAVE to be long, to resonate it on
> 80m. Thats tough on a city lot. The problem with ground mounted
> verticals,
> on city lots, is they radiate into the home. Then with stucco homes,
> there is chicken mesh beneath the stucco... and ditto with the neigbours,
> like being in a faraday shield. Once elevated in the clear, the difference
> can be
> astounding. But radials on the low bands like 80m is tough.
>
> Jim VE7RF
>
>
>
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--
-----------------------------------------------
*Michael Murphy - KI8R*
mike@ki8r.com
www.ki8r.com
*614-371-8265 (cell)*
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