The circuit that introducing here could have a good function without using an antenna and receive signals of 14 to 45 kilo hertz transform them to sonic signals. By the help of potentiometer we can change the frequency of fluctuation maker IC1.
By using t1, output signal of fluctuation maker be mixed with received signals that's because the IC2 is placed with rotary form in the circuit. Sonic frequencies and a small sonic signal get to T2. For operating existing loudspeaker in output the antenna 50 to 80 cm is enough and being invigorated very well
For testing this circuit approaching it to TV, a stable sound attain to your ears and with remote the set from TV the set be stayed quiet.
Notice
This circuit working with 14 to 45 kilo hertz frequencies. If you would like it work from 1 to 60 kilo hertz the circuit have to be repair. good luck
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