This circuit was found in a PE Hobbyst Handbook of 1989. It uses a black light fluorescent of the time. Small fluorescent black light from 1 to 4 W can be used.
The integrated circuit used in this configuration for noise reduction on FM radios is not common...
This circuit uses integrated 555 and an amplification step with transistors, as we can see in the...
The operating range of this circuit ranges from 0.5 to 2 MHz and its gain is 11dB. Transistors can be of...