I suggest a simple direct conversion receiver such as the really simple one in the classic book EMRFD: https://www.amazon.com/Experimental-Methods-Design-ARRL-

I suggest a simple direct conversion receiver such as the really simple one in the classic book EMRFD: https://www.amazon.com/Experimental-Methods-Design-ARRL-Inc/dp/087259923X https://www.amazon.com/Experimental-Methods-Design-ARRL-Inc/...