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Re: VLF: 8970 Hz transmissions, soon again here

from [Roger Lapthorn] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: 8970 Hz transmissions, soon again here
From: Roger Lapthorn <[email protected]>
Date: Sat, 26 Nov 2011 15:21:43 +0000
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In-reply-to: <[email protected]>
References: <[email protected]> <66E491BAB91C48AF81191F4022525A14@DennisPC> <BF4A524700075746A6467658DFC7102CB0B489A4F0@ICTS-S-EXC2-CA.luna.kuleuven.be> <6FE757960E6C447781689D4F19A315AE@DennisPC> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Stefan/VLF,

My G3XBM 8.97kHz grabber is working currently looking for your signal. See https://sites.google.com/site/sub9khz/vlf-grabbers/xbm-grabber .

Good luck everyone in finding Stefan's weaker signal.

73s
Roger G3XBM



2011/11/26 Stefan Schäfer <[email protected]>
VLF,

I'm now running 350W into the system and get about 0.8 A antenna current. Strong audible partial discharges occurr on a parallel fixed plate capacitor, spaced by 3 cola bottles (0.33l ;-) ). At 550 mH i have 25 kV rms on the antenna and coil which seems to be no problem at all.

The frequency is still a bit unstable since i took the DDS VFO which is more comfortable to find the resonance. I will now try to slightly QRO and then apply a fiber optic cable carrying the GPS locked frequency coming from the PC/SpecLab, hopefully without to many phase glitches. Currently i may have an offset of some 20...30 mHz and a slight drift but it is a first successfully test :-)

73, Stefan/DK7FC





--

http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
https://sites.google.com/site/sub9khz/
http://qss2.blogspot.com/

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