Thanks for the suggestion, Roger. This seems like the
best option until a very long piece of wire is found.
Your VLF web page is an excellent source if info.
Many thanks!
Joe VO1NA
On Mon, 23 Jun 2014, Roger Lapthorn wrote:
Joe,
Alternatives are a large TX loop or even a large earth-electrode antenna.
You'll need some high voltage caps but no large coils to wind.
73s
Roger G3XBM
On 23 June 2014 20:33, <[email protected]> wrote:
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
|
