[600MRG] Automatic Antenna Tuning

[John Langridge]

Paul,

Many of us are using motor-driven variometers and shunt elements to manage
impedance excursions or  QSY up and and down the band.

As far as automatic antenna tuners are concerned, Eric, NO3M / WG2XJM,
built an arduino-based system a few years ago, probably sampling voltage
and current on the line ala the scope match and making decisions about what
direction to move the drive motor for the best match.  I don't know if he
is still using it with his new system but it gave him the flexibility that
you are seeking...

73!

John KB5NJD / WG2XIQ..

On Thu, Dec 15, 2016 at 7:40 AM, Paul Signorelli <w0rw1 at msn.com> wrote:

> Has anyone found an easy way to do Automatic Antenna Tuning.
>
> My antenna will swing 5 kHz over a cold winter nights nap.
>
> I am sure it is the trees which it is hung in.
>
> Has anyone made an automatic or semiautomatic system to trim out those
> variations?
>
> Thermostats, etc?
>
> I have to go out side and change an antenna tap.
>
> I think I will just install a switch, maybe a remote switch.
>
> Paul  wa2xrm
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