[NLRS] Isosceles Triangular omnidirectional 6-meter loop antenna impedance matching

[Russ Ramirez]

Loops and triangles should be full wave in order to get a close
impedance match @ ~100 ohms, with the imaginary reactive component being
strongly inductive. If the loop is full wave, then 2.0:1 VSWR would be
expected "in theory". 3.1:1 seems in range for such an antenna without a
balun.

Russ

On Tue, Jul 20, 2021 at 10:37 AM Carl A Estey <CARL at esteys.net> wrote:

> Hello all;
>
> At the tailgate swap fest a few weeks ago I bought a loop antenna for
> 6-meters.that looks similar to the PAR Electronics OA-50.  I tried the
> antenna yesterday and it works poorly.  There is a slight decrease in SWR
> at 50.5 MHz but it does not get below 3:1.
>
> I discovered that the antenna uses a gamma match as compared to the PAR
> which uses some sort of sealed mystery “matchbox”.  I suspect that this
> mystery tuning box has some sort of current choke and may be a 4:1
> impedance matching choke.
>
> Does anyone know what is in this mystery tuner and have suggestions as to
> how I might make this antenna work?
>
> 73
> Carl WA0CQG
> carl at esteys.net <mailto:carl at esteys.net>
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