Stefan
What method do u use to couple the amplifier to the electrodes? Is the amp
output impedence 8 ohms.
My method for my antenna using an audio amp would be to use a ferrite
transformer to step up the 8 ohms to 50 ohms (x 6.250) turns Prim 8 and
Secondary 20 turns. This way I can use my existing test equipment for swr
etc.
mal/g3kev
----- Original Message -----
From: "Stefan Schäfer" <[email protected]>
To: <[email protected]>
Sent: Tuesday, August 17, 2010 10:45 AM
Subject: Re: LF: Earth electrodes antenna tests[Contest results]
> Hi Rick,
>
> Am 17.08.2010 11:10, schrieb Rick Wakatori:
> > This is an example of sending by the two earth electrodes antenna.
> > I hope more experimeters will got a same trend.
> > 7L1RLL Rick
> >
>
> This weekend, i plan to do a test with a 600m spaced earth electrode
> antenna on 8970 Hz (if the QRN is reasonably low). TX power will be
> somewhat between 150 W and 600 W. The RX station is in about 50 km
> distance. It would be 5x the current record distance with earth
> electrode antennas on VLF!
>
> Markus/DF6NM will also watch the QRG but 174 km distance is not really
> probably.
>
> Marco/DD7PC, would you also be interested to watch? Your system seems to
> work now, as seen on 6470 Hz! :-)
>
> 73 all, Stefan/DK7FC
>
>
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