LF: VLF in Canada

[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