Re: VLF: 8970 Hz transmissions, soon again here

[Bill de Carle <ve2iq@magma.ca>]

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.