RE: VLF: 8970 Hz Op-4H

To:	<[email protected]>
Subject:	RE: VLF: 8970 Hz Op-4H
From:	"hvanesce" <[email protected]>
Date:	Wed, 1 Jan 2014 02:58:46 -0700
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Congrats Markus and Stefan!

Great news, well done.

Am I interpreting correctly in the following?

17dB SNR with FFT bin width of ~ 69uHz, from ~~20uW ERP (9 meter antenna) at 175km?

I will be celebrating VLF Opera tonight.

Happy New Year,

Jim AA5BW

From: [email protected] [mailto:[email protected]] On Behalf Of Joe
Sent: Tuesday, December 31, 2013 12:06 PM
To: [email protected]
Subject: AW: VLF: 8970 Hz Op-4H

Hi Markus, Stefan,

congrats to you, well done!

73 Joe

Von: [email protected] [mailto:[email protected]] Im Auftrag von Markus Vester
Gesendet: Dienstag, 31. Dezember 2013 19:15
An: [email protected]
Cc: Paul
Betreff: Re: VLF: 8970 Hz Op-4H

Stefan, we made it ;-))

DK7FC JN49IK VLF OPDS-4H correlation     Range: 8969.87 ... 8970.23 Hz
   date      time   call   distance frequency bandwidth snr    correlation
2013-12-31 18:07:58 DF6NM    175km   8970.000Hz   0mHz -58.3dBOp 100% 17.0dB

Wishing you all a very good start into 2014!

73, Markus (DF6NM)

From: Markus Vester

Sent: Tuesday, December 31, 2013 3:17 PM

To: [email protected]

Cc: Paul

Subject: VLF: 8970 Hz Op-4H

This morning I have reconnected the VLF amplifier and coil to the antenna, and started to transmit on 8970.000 Hz (Rb controlled). Sent a more or less uninterrupted carrier between 12:30 and 13:30, and have started an Opera-4H sequence at 13:41.

With 0.33 amps up to 9 m my estimated ERP would be around 20 uW. The carrier seems to be well visible on the OK2BVG grabber (up to 10 dB in "600"). I'm now trying to reach opds-4H at DK7FC but the SNR (10 dB for the carrier in "6000") may be just a bit marginal.

Best 73,

Markus (DF6NM)

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