hey, i think i found out why everything was so wierd for my superhetrodyne receiver.... my problem was that there is a tone burst signal that i measured using the oscilloscope.. but everything didnt work, even when i amplify the signal using op amp... not i know why... i suspect that the probe that is connected to my oscilloscope that is the one that picked up the signal, not my circuit.... that explains why amplification cant be done.. so the whole receiver circuit isnt working after all.....
by the way, i will reconstruct the circuit again on the PCB board...
so now i am constructing another one.. it is working, but just do not understand how it works..
this is the receiver... can someone explain how the L1 and L2 work? on the PCB board, its copper strips on it.. (attached also)...
so can i replace it with jumper wires other than using the strips? what i found out is that this will affect its frequency...