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...recording 137.45 to 137.55 kHz here as
well.
With 4 m effective height, radiation
resistance for vertical polarisation would be around 5 milliohm, so no real risk
of breaking ERP rules (yet ;-). If ground resistivity is not too low there
might additionally be some high-angle horizontally polarized
radiation.
Nice line on Gary's grabber indeed. At larger
ranges into Europe, 136175 might be a bit ambiguous as it coincides with
one of the Russian Loran lines at 6.25 Hz multiples.
BTW Gary's grabber also showed a long dash on
8270.005 Hz this afternoon - presumably another local test signal?
Best wishes,
Markus (DF6NM)
Sent: Saturday, March 12, 2016 8:01 PM
Subject: Re: LF: EbNaut from Todmorden
hello Paul,
my LF receiver is active
and it is recording audio for Ebnaut-RX.
GL.
73 and good weekend to
all group.
Domenico, iz7slz
Could be? Carrier on air 136.175
kHz intermittent since 16:40,
continuous since 16:54 and later will move
to a frequency in
the OPDS band for some EbNaut.
> 20160312_170553.jpg
That reminds me, I need to stock
up a bit with FKP caps!
I haven't measured the antenna current, I'll
have to rig
something up to measure that. It's probably 2 or 3
amps.
The wire is about 500m but the average height is only about
4m
and it is surrounded and supported by lots of trees. I
expect
the radiation resistance is very low. In fact I'm
counting
on it otherwise I'm breaking the law!
> That's
certainly the best way to go, using an isolating
> transformer
at the end of the coax. Prevents you from
> unwanted currents
through the house / mains earth.
Yes, putting another transformer at
the far end of the coax
has improved things considerably. I had
some interference in
the house but now that's gone. A PC monitor
with touch button
controls was merrily switching itself on and off all
the time,
now it is fine. The ADSL was complaining and resetting,
now
it has no problem.
In a while I'll go out and see if the mud
patch is steaming :)
Earlier I had a tub of salt water simmering.
This is fun!
--
Paul
Nicholson
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