Re: VLF: Long time transmission on earth antenna

[Gary - G4WGT <g4wgt@tiscali.co.uk>]

Hello Stefan,

Nothing here up to the sound card crashing about midnight.

73

Gary - G4WGT

On 19 November 2010 11:03, "Jean-Pierre Méré (F1AFJ)" <jpm.f1afj@online.fr> wrote:

Hi Stefan ,

Nothing here ! I listening 20:00 to 07:00 today

73 Jean-Pierre f1afj

Le 19/11/2010 11:50, victor13@online.nl a écrit :

Not a trace Stefan,sorry,

73
Victor

-----Oorspronkelijk bericht-----
Van: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org]Namens Stefan Schäfer
Verzonden: vrijdag 19 november 2010 10:15
Aan: rsgb_lf_group@blacksheep.org
CC: Paul; Bernd Grupe
Onderwerp: Re: VLF: Long time transmission on earth antenna


Dear VLF,

It seems these batteries are not in best condition. The carrier got
weaker and weaker in the morning and disappeared arround 5 UTC.

The SMPS that drives the PA is designed to generate its own 15 V supply
once it started to run. But if the input voltage falls below 10V (or 9)
it shuts down. Seems that this has happend... The batteries have>  300
Ah in sum so it should have been no problem, actually...

I assume no one except me has detected anything?

BTW: The starting time was 15:30 UTC so the DFCW shift appeared at 23:30 UTC

73, Stefan/DK7FC



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