Hi Chris,
Congratulations to that great success! Your work and motivation shows
us you are a real DREAMER! :-)
Looking at the different screenshots i see that your frequency is
actually very stable, impressing. I agree with Paul Nicholson that you
may be visible here in even smaller bandwidths than 424 uHz. With a
fixed antenna, the ERP is lower but you can run the TX for several days
if necessary. So we may try it in "60000".
Last friday i have arranged a grabber window for you at
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
Since i haven't had the time to wait until the first pixels appeared, i
haven't optimised the color scale. The spectrogram is to dark now. But
i can correct that afterwards! So maybe i will find a faint trace of
you? :-) Otherwise i will try it even slower next time.
Looking forward to that!
73, Stefan/DK7FC
Am 07.03.2011 22:33, schrieb Chris Osborn:
LF,
Following my 9.090 909 kHz transmissions last Saturday I received
positive reports from the following stations:
Paul Nicholson 218 km
G3ZJO 46 km
G3XBM 45 km
G3WCD 19 km
M0JXM 1.5 km
Many thanks to these stations and to the others who tried to copy me
but reported no success.
STATION SET UP
Home built VLF TX with a Droitwich-locked frequency reference and a
programmable divider (10.000 MHz / 1100).
Output power - approx 100 watts RF from a MOSFET PA and 30 volt supply.
Aerial - 40 m end fed inverted 'L' at a height of 10m. - running NE / SW
Loading Coil - home made 1.3 H on a wooden-framed former.
Paul Nicholson believes that with a long and stable transmission I may
possibly be picked up by mainland European stations.
I hope to be transmitting on VLF most weekends and will publish times
and frequencies as appropriate.
73
Chris G3XIZ
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