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Re: VO1NA on LF:

To: [email protected]
Subject: Re: VO1NA on LF:
From: [email protected]
Date: Tue, 4 Jul 2017 20:34:06 -0230 (NDT)
In-reply-to: <[email protected]>
References: <[email protected]>
Reply-to: [email protected]
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Hi Markus,

The oscillator is still undisciplined -- much like your's truly.
The carrier is still on with 1/3 A RF.  I was considering getting
a gps module until Stefan reported on his odyssey!  In the mean time
it seems like a good idea to use NAA as a reference for Spectrum Lab.
With the RX antenna connected to the pc soundcard and the sample rate
set to 96000, VLF_stations.usr gives a sharp 50 dB cutoff at 8 kHz
and not a trace of NAA. Evidently more fiddling is required.

High voltage managment has had gratifying results. The tuning coil
is starting to look elegant with its 3 pies and a solenoid. Distributing the kilovolts over more coils seems to have cured the sparking and
ozone spewing.

Thanks for the note, Markus.


On Mon, 3 Jul 2017, Markus Vester wrote:

Great news! Though it's high-QRN season here in central Europe, Paul will 
surely detect you again in England. The DL0AO grabber also covers your QRG and 
will hopefully be back online tomorrow. Tom and Bernd are preparing to install 
a second earth antenna to the northwest soon, supporting a cardioid in your 

So good luck with the high voltages! Any progress on the GPS frequency lock?

Best 73,
Markus (DF6NM)

-----Urspr√ľngliche Mitteilung-----
Von: jcraig <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Mo, 3. Jul 2017 16:51
Betreff: Re: VO1NA on LF:

Hi Stefan,

The TX is now on 8270.007 +- a few ppb. Thanks for the
advice and good luck to those looking for a trace of
the weak VLF sigs!


On Mon, 3 Jul 2017, DK7FC wrote:

Am 03.07.2017 14:52, schrieb Roelof Bakker:
Hello Joe,

Propagtion is a weird thing.
LF propagation at least :-) MF even more.
I find that VLF propagation is quite predictable, reproducable and
understandable :-)

73, Stefan

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