Hello Horst, Roelof, LF
I did try my regular Mini-Whip for receiving on the "dreamers band" but the
signal level rolloff was already pretty severe at 9kHz. I finally settled for
my inverted-L (15m V, 35m H) straight into the coax and a simple BC-band
lowpass before the soundcard to kill the 9kHz IMD products that I had at first.
What exactly went into this optimisation, just larger coupling capacitors and
larger chokes for feeding/extracting the DC or is there something else involved
as well?
BR
Paul-Henrik, OH1LSQ
Quoting Horst Stöcker <[email protected]>:
> Hello all, congrats to Stefan and all who had success in receiving his
> signals.
> I had no success in receiving Stefans tests. This time I used a mini whip
> with my IBM laptop soundcard. Normally this is a real step forward in my RX
> setup for VLF. The one I got from Roloef (many thanks) is optimized for VLF
> reception. Much better than any antenna I tested before. All three Alphas are
> well vissible. But obviously the noise level is to high here at my home QTH,
> indeed. I supposed that before. Now I know.
> I do not think that I can find a better position for the antenna. It's now
> about 8 m above ground, mounted in a 2m PVC tube on an old chimney.
> So I can find just one conclusion: All of you who could reveive Stefans
> transmissions must be living more or less on the countryside. Or should it be
> that I have the pity to live in such a noisy urban environment?
> Next time I will have to go to the countryside, too.
> Looking forward to SAQ tomorrow. I received SAQ many times and this time with
> the mini whip it will be easyer then ever.
> vy73 Horst DO1KHS/DI2AN
>
>
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