My new VLF grabber is back on
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
Some general experiments will be done there in the next time. I still
have to calibrate the colors. There is some irregularity which deforms
the magnetic fields and so the colours. A LPF is needed as well.
Hopefully i can improve the S/N to get some useful sensitivity...
73, Stefan/DK7FC
Am 10.03.2012 23:34, schrieb Stefan Schäfer:
VLF,
I just build an arrangement of 2 orthogonal delta loops with a
circumference of 10m. They are not resonated and there is still no
preamp in use, so they are directly connected to the soundcard.
They are made out of CAT5 STP cable, so it is a shielded loop with 8
turns.
Now it is possible to run SpecLab in the Colour Direction Finder mode.
Tonite i will be silent on LF just to see how the wideband windows
look on VLF. That is a new dimension for me, like switching from
black-white TV to colour TV ;-)
Sensitivity is about 15 dB down to the E field grabber on the
building. This loop is 7m above ground but on the ground of the 2nd
floor of that building. Room for improvements. Anyway it is most
interesting to see the different colours of DHO38.
See http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
73, Stefan/DK7FC
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