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Re: VLF: Long time transmission on earth antenna

To: [email protected]
Subject: Re: VLF: Long time transmission on earth antenna
From: Gary - G4WGT <[email protected]>
Date: Fri, 19 Nov 2010 15:32:42 +0000
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Hello Stefan,

Nothing here up to the sound card crashing about midnight.


Gary - G4WGT

On 19 November 2010 11:03, "Jean-Pierre Méré (F1AFJ)" <[email protected]> wrote:
Hi Stefan ,

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

73 Jean-Pierre f1afj

Le 19/11/2010 11:50, [email protected] a écrit :

Not a trace Stefan,sorry,


-----Oorspronkelijk bericht-----
Van: [email protected]
[mailto:[email protected]]Namens Stefan Schäfer
Verzonden: vrijdag 19 november 2010 10:15
Aan: [email protected]
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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