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To: [email protected]
Subject: Re: LF: NA VLF
From: DK7FC <[email protected]>
Date: Tue, 23 May 2017 17:35:01 +0200
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]>
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Hi Joe,

Your first attempts to cross the pond is certainly more remarkable than my meanwhile almost daily transmissions for the VLF establishment :-) I just assumed that Paul is the only one who can receive you anyway. Also he can tune to your direction which is the back side of my direction. So i did not assume that i would lower the SNR in your experiments.
Please stay near 8270 Hz, at least with the carriers.
Maybe Paul can tell us if QSY is necessary to avoid a lowering of the decode performance.
73, Stefan

Am 23.05.2017 17:10, schrieb [email protected]:
Paul and Markus,

Thank-you for the encouragement and patience, but infortunately the message received does not match the one that was sent, assuminmg the
sending was done correctly.  Can we try again?

Hopefully I am not causing QRM to Stefan's QTC on 8270.1 Hz.  If so I can
QSY back to 8277 Hz!  Can we try his suggestion for a daytime attempt to
take advantage of the lower QRN or will the S/N be too low?

Also, are the sigs stable enough? Stefan suggested a GPS module that
could be used with Spec Lab to generate a disciplined carrier.  The WX
should be more stable now.  Last night the ERP decreased  and the phase
probably shifted too.


On Tue, 23 May 2017, Markus Vester wrote:

Paul and Joe,

great news! Your patience has finally paid off. Congratulations to both on this excellent piece of work!
Markus (DF6NM)

-----Ursprüngliche Mitteilung-----
Von: Paul Nicholson <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Di, 23. Mai 2017 12:07
Betreff: Re: LF: NA VLF

Overnight 22nd/23rd was fairly quiet and the decoder turned up


at Eb/N0 = +0.5dB, BER 42.7% with constant reference phase,
peaking at frequency of 8270.0070925 Hz + 6 uHz.

Rank 7430 in the decoder list.
Carrier S/N: 12.81 dB in 39.2 uHz,
-31.26 dB in 1Hz,
-65.24 dB in 2.5kHz

Paul Nicholson

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