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LF: Re: DK7FC close to SAQ

To: "[email protected]" <[email protected]>
Subject: LF: Re: DK7FC close to SAQ
From: VIGILANT Luis Fernández <[email protected]>
Date: Sun, 26 Nov 2017 09:52:00 +0000
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Thread-index: AQHTZkeXRqmUbcQy5ECxE5GZFIsJoKMmarZk
Thread-topic: DK7FC close to SAQ

Grande Stefan !!!!

Unfortunately have just read your email. This is amazing. I have just set my last window at my grabber
to try 17.4701 KHz

Thoght that this Christmas we would have no SAQ, but then you fixed that ! hi hi

73 de Luis

De: [email protected] [[email protected]] en nombre de DK7FC [[email protected]]
Enviado: domingo, 26 de noviembre de 2017 0:40
Para: [email protected]
Asunto: VLF: DK7FC close to SAQ


Since 23 UTC a 700 mA carrier is running on 17.4701 kHz!

It is a little surprise to the VLF community i think ;-)

Legal? Yes:,47kHz_Sonderlizenz.jpg
Actually the document has 3 pages but the other ones are no so relevant.
My ERP is limited to 5 mW. I did not request more because more isn't possible anyway with this antenna.

I wound a big single layer coil with 0.5 mm enameled wire on a PVC tube with 315 mm outher diameter.

0.7 A is just a first careful step. The coil is designed to hold 1.5 A 'key down'.

The carrier will run the whole night and even tomorrow at daytime.

Worldwide reports are welcome ;-)

It is not sub-9-kHz but still VLF, the 17 km band!! So give it chance :-)

The tree has still some solar power to stream the signal from the EW loop down to the city, so there is a feedback spectrogram at

73, Stefan

PS: I still can hear that tone of the coil. It is terrible! Be happy when you are older than me!
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