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Re: VLF: 8970 Hz transmissions, soon again here

To: rsgb_lf_group@blacksheep.org
Subject: Re: VLF: 8970 Hz transmissions, soon again here
From: Bill de Carle <ve2iq@magma.ca>
Date: Sat, 26 Nov 2011 07:43:17 -0500
In-reply-to: <4ECFD8B6.2050601@iup.uni-heidelberg.de>
References: <BAY154-W46E722A4D4B5201E7F854DD3C30@phx.gbl> <66E491BAB91C48AF81191F4022525A14@DennisPC> <BF4A524700075746A6467658DFC7102CB0B489A4F0@ICTS-S-EXC2-CA.luna.kuleuven.be> <6FE757960E6C447781689D4F19A315AE@DennisPC> <4EC2C6EB.2080201@iup.uni-heidelberg.de> <4EC2DB14.9000807@talktalk.net> <4ECFD8B6.2050601@iup.uni-heidelberg.de>
Reply-to: rsgb_lf_group@blacksheep.org
Sender: owner-rsgb_lf_group@blacksheep.org
VLF grabber at VE2IQ is on and will be active through the day.  We can always dream.  Good luck Stefan!

http://www.magma.ca/~ve2iq/grabs

Bill

At 01:04 PM 11/25/2011, Stefan DK7FC wrote:
Eddie, VLF,

The coil and PA and all the parts are here now and maybe i will do first tests tomorrow in the afternoon on 8970 Hz.

The goals would be to resonate on the frequency and apply 50 kV rms or more. Oh i just calculated: My coil has about 550 mH and the antenna 473 pF. So i need about 100 pF from somewhere else, remembering my homemade plate capacitor with the cola bottles as the spacing insolator ;-) The coil has about 320 Ohm DC resistance and if i actually want to apply 50 kV, i would need 1.2 kW for that. No problem for the PA i think. The ERP will be below 1 mW anyway :-(

But the background noise is extremely low in the last time and if i can a stable signal over several hours i expect to be visible in many spectrograms.
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