Aircraft band radio construction summary:
A NE602 double balanced mixer (U1), MC1350 linear IF amplifier (U2), LM358 quad op-amp (U3), and LM386 audio amplifier (U4) make up the Aviation Receiver's super heterodyne AM unit. Plugging an antenna into J1 picks up AM. C1 connects the signal to a three-section tuned-filter network (L1-L5 and C2-C6). Amplification VHF transistor (Q1) receives 118-135 MHz VHF signals from C7. The double-balanced mixer NE602 acts as a local oscillator and routes signals through...