Re: LF: Coherent BPSK on LF using EbNaut

[Paul Nicholson <vlf0403@abelian.org>]

I have an E-field rx running on the 137 kHz band,
GPS locked.

Here is the 'first light' spectrogram

 http://abelian.org/tmp/lf151023a.png

which covers 137 kHz to 138.5 kHz.

It's a bit shaky, everything held together with
croc clips but hopefully will survive long enough
to pick up an amateur signal or two.

I'm recording 135 to 138.5 kHz.   I reckon the battery
is good for about 60 hours.

Maybe there will be some distant unmodulated carriers
to measure, or even a coherent BPSK message.

137.5 kHz looks quiet here.

--
Paul Nicholson,
Todmorden, UK.
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