Regarding Observation 6972658 …
Hi Fredy actually I have in front of RTL SDR a very narrow Filter for 137Mhz. Signals around 146 are attenuatted by about 50dB. >> No RX
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You can go to your station settings and define a custom frequency range for your antenna, so only observations inside your filter’s pass-band will be allowed on your station
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Did add the Filter thank you