The sensitivity of receiver it is possible to increase itself considerably, if is interfered, between this and his aerial, a amplifier RF.
40 MHZ-Wide Band RF Amplifier Circuit Diagram :
The amplifier of circuit, does not use in resonant circuits and for this is suitable, so much for mid waves, what for the low waves, up to the 40 MHZ. The gain his it is the order 20db and it consumes 7mA, when it is supplied with 12 until 15V dc. His entry and the exit are adapted with coaxial cable, complex resistance 75ohm.
Source : users.otenet.gr