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Re: VLF: 8970 Hz transmissions, soon again here

from [Stefan Schäfer] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: 8970 Hz transmissions, soon again here
From: Stefan Schäfer <[email protected]>
Date: Sat, 26 Nov 2011 15:57:42 +0100
Cc: Paul <[email protected]>
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]>
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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
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