Topband: elevated vertical matching

[Brian Moran]

I left a bunch of "extra" feet on the vertical
radiator, four elevated radials (choke-isolated from
ground), 200K of static bleed resistance. I pulled
wire down until the MFJ-259B read about 1.2:1. Maybe
I'll try 3/4 wave this weekend :-).

--- DAVID CUTHBERT <DAVIDNNAN at MSN.COM> wrote:

> Steve,
> 
> The radiation resistance of your balloon vertical
> will be 36 ohms. By the time you add in ground
> losses you will be up to around 50 ohms. I would
> just feed it at the base and tweak the length to
> resonate it at 1830 kHz (or whatever you like). This
> antenna will cover over 100 kHz with a VSWR below
> 2:1. I would just put it up, base feed it, and fine
> tune it with a good tuner at the shack. As long as
> the VSWR is below 6:1 at resonance things should be
> fine.
> 
>      Dave WX7G
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