Hello Albert,
That's quite good.
Today it is just 50 dB in 1 Hz here. I have extended my wideband screen
to display DCF39 and HGA22, bottom of
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_LF_DX_Grabber.html
In my RX there is a band pass filter with unknown attenuation at 138.83
kHz. I estimate it is 15...20 dB. But it changes when the antenna
becomes wet :-/ Somehow i think there is a stable and equal distributed
noise level here in the city that limits the sensitivity. But i've
learned a bit more in the last weeks and will investigate things
further...
73, Stefan/DK7FC
Am 08.08.2011 10:27, schrieb Albert:
Hi Minto, Roelof, Stefan es others,
The difference between DCF39 and the
noise floor on a quiet day is 92 dB in
1 Hz (JO33DE) Antenna "inv L" 18m V and 34m H
73, Albert
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