Hello Piotr,
If you need a test signal on LF, i am transmitting right now! Distance
is just 801 km ;-)
See http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_LF_Grabber.html
73, Stefan/DK7FC
Am 19.08.2011 22:07, schrieb Piotr Mlynarski:
Hi Stefan, LF
the rx setup mentioned in my previous mail has been built
yesterday afternoon/evening so it definitely needs
improvements/rearrangements etc..
first of all i must raise the ferrite from the floor , find more
suitable place an so on.. the voltage gain of the buffer/amplifier
stage is abt 27 dB
the cap in LC consists of three parallel mica capacitors of nominaly
560 pf each + 500 pf air variable
i do not have a VNA at hand so in fact no serious measurements have
been made. Of course, i will make further experiments
and if i catch any distant signal, sure, will announce here.. :)
73, Piotr, sq7mpj
qth: Lodz/jo91rs/
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