Ultra Low Noise Amplifier 10-6000MHz w/ 40 dB Gain , Tested with HackRF SDR on L-band at 1.5ghz. Could not get it to function without a Highpass filter before the input set for 1ghz. So you may need to buy/make/ add filters for the band your interested in listening too. Seems to work very well with an added filter.... Haven`t tested this amp on HF frequencies yet. The problem I think maybe to do with the broadbandness of the amp 10mhz -6000mhz . Would be much much better I think if this device was modified for VHF to 6ghz only for me, Or Hf to VHF only....Cheers Tony.
Just want to mention that the gain as specified on the product page is between 35 and 45 dB for F < 1.5 GHz. That is a lot of gain. The HackRF receiver is wide open. Coupled with the fact that there are many strong signals (FM for example) in the sub 1-GHz range, you are bound to see receiver saturation when the LNA is used with a broadband antenna.
The LNA that you bought is actually intended for processing weak signals and it is recommended that a filter be used to eliminate strong undesirable signals in the frequency range of the receiver. Without this you will see distortion products in your receiver output.
We do have LNAs with lower gain and covering a smaller frequency range. Check out the Red LNA that operates from 10 MHz to 4 GHz for instance.
Best wishes, GPIO Labs