Message-ID: <58EB9AA6.1010804@posteo.de>
Date: Mon, 10 Apr 2017 16:45:58 +0200
From: DK7FC <selberdenken@posteo.de>
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References: <58EA2389.9070107@posteo.de> <519a2968-f0e0-e779-a1e9-c3e1e0085ba8@psk31.plus.com>
In-Reply-To: <519a2968-f0e0-e779-a1e9-c3e1e0085ba8@psk31.plus.com>
Subject: Re: VLF: DFCW-6000
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Eddie,

What i wanted to suggest: What about a loop as an alternative antenna? 
With 2 soundcards you could run 2 spectrograms comparing both antennas. 
You know the loop in my tree is a single turn loop with just 1.2m 
diameter out of  copper tube which has 10mm diameter. It is a non 
resonated loop with a ferrite transformer (Al~10nH), i.e. 1 single 
primary turn and about 100 secondary turns connected to the preamp. It 
could help to reduce the QRN in summer. But maybe the QRM becomes even 
higher. On the other side you can eventually cancel out the QRM, maybe 
worth a try.
Or go /p, e.g.. here: 
http://no.nonsense.ee/qth/map.html?qth=IO92MG54RP&from=IO92MG54MO :-)

73, Stefan

Am 10.04.2017 09:37, schrieb g3zjo:
> Hi Stefan
>
> Conditions are not as good during daylight as when you decided to give 
> DFCW a try in 424 uHz. It will be interesting to see what happens 
> during today.
>
> There was a glitch also at the start from my end. When I arrived home 
> the shack had been locked up and in full sunlight, soundcard error was 
> around 3.7ppm, I decided that was maybe a bit near to 5ppm with the 
> hottest day of the year in progress and upped the limit to 10ppm, not 
> realising that SpecLab would do its funny little scroll forward trick.
>
> Attached is a view of D K - with the gap produced by the scroll cut 
> out. A pretty marginal D, it may have been compressed by the scroll 
> forward, but it is there.
>
> 73 Eddie G3ZJO
>
>
> On 09/04/2017 13:05, DK7FC wrote:
>> VLF,
>>
>> Today, 12 UTC, i'm trying to leave my call on G3ZJOs 8270 Hz 424 uHz 
>> grabber. It may be visible on other spectrograms as well...
>>
>> 73, Stefan
>>
>>
>>
>