Re: LF: VLF in Canada

[DK7FC <73dk7fc@googlemail.com>]

Hi Joe,

Fine to hear that you're give it a try. Please, don't ask Industry 
Canada if the 10mW is RF power of ERP!
To get out a real signal on VLF, there is no alternative to a real large 
coil without ferrites! Think about the high voltages... But 100m of 
antenna wire is a good start. I remember 550 mH for my 100m kite 
antenna. For me it was 2000m of 0.4mm diameter wire :-) Nice work is 
that. Takes long but is a funny game :-)
73, GL, Stefan

Am 23.06.2014 21:33, schrieb jcraig@mun.ca:
> Dear Group,
>
> I tried again to get an LOA  for VLF.  This time, the response from 
> Industry Canada was favourable: 10 mW 8.0-8.3 kHz.  Yesterday, after a 
> few slight rf burns, and  thanks to PA0RDT's miniwhip design and 
> DL4YHF's Spectrum Lab and advice, VLF sigs on 8.277 kHz were heard at 
> 200m from the 100m wire aerial. This was a reception outside my back 
> yard!  10 watts from an 1970's keyboard amp (volume control set on 3) 
> were stepped up with an xfmr to a lossy 500 ohm tuning coil peaked 
> with a ferrite rod for maximum squeal at L=0.35 H.
> Is it possible for someone who is not especially enthralled by winding
> a mile of 0.7mm wire to use an iron core to make a VLF tuning coil?
>
> 73
> Joe VO1NA