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Hello Mal
You don't quote the all important, the bandwidth that you were taking these
measurements in.
I've just done a quick look on my receiver.
20kHz DDC bandwidth and 10Hz selectivity
Noise floor with no antenna < -150dBm
Noise floor with Beverage antenna connected < -140dBm
73s Tracey
----- Original Message -----
Sent: Friday, June 22, 2012 10:38
AM
Subject: LF: NF MF
MF
Experiment this morning on 475 Khz band.
Flex 3000 SDR rx on 475 Khz.
Noise floor - no antenna -----with 10dB attenuation
inserted-------------120dB
Antenna 1/4 wave inv L connected 95dB therefore a
gain of 25 dB
Time 0900 utc ----daytime Band quiet
no static -- typical radio environment at this QTH
I must do this check after dark
g3kev
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