We found this circuit in the October 1991 issue of Radio Electronics magazine. The circuit uses common components and can still be assembled easily today.
March 2017 - Microchip's new 8-bit PIC16F15354 microcontrollers can now be obtained from Mouser...
With the presented circuit it is possible to detect signals from transmitters in a frequency range...
This MOSFET amplifier operating in the VHF range was found in an old American telecommunications...