SDR reception gain

[MTL_Emergencies]

Hello,
I have 2 SDRs (1x NooElec SMArt (bought in 2018) and 1 RTL-SDR blog dongle (bought in 2020)). I realized that the NooElec dongle reception is not strong compared to the second dongle. Both dongles are connected to the same antenna and gain settings are the same (TUNER LNA 49 and RTL AGC enabled).

For the same signal I have a peak of reception at -45 dBFS (NooElec) vs -34 dBFS (RTL SDR Blog)

Is it a known issue? Is the dongle dead?
Thanks

 

[slicerwizard]

FWIW, my experiences with NooElec SDRs has not been good. If you're dealing with 800 MHz systems (or anything above 400 MHz), the orange FlightAware dongles have great sensitivity.