Hello Markus, VLF,
My antenna switch works now. I wrote a small script (just my level of
skills, while loops and so on ;-) ) that allows tto switch from the
north-south loop over to the east-west loop to a certain time and then
back to another time.
The script is now tested the first time, i switched to EW since 14 UTC
and will be back on NS at 16 UTC. You can see the difference at
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
So, Markus, if you want to try a short EbNaut transmission soon in the
morning, just tell me the day before, then i can switch the antenna to
you just during the start of your transmission, while i'm still
sleeping. And then back into Uwes direction, who prefers unannounced
transmissions :-)
I als removed the grounding on the relay pin of the unused antenna,
which caused a coupling between the loops. Now it all should work well...
It opens new playing fields, e.g. testing an alternative E field antenna
on the second input. That will be a better choice for the 970 Hz
experiments...
73, Stefan
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