Using RF coil as pick up to send into RF amplifier to 250 uA meter ( 50 or 100 uA is more sensitive meter ) with preset zeroed we carry detector around room or area looking for meter deflection as RF energy comes into range and closer to transmitter the stronger signal shows on the meter.
The 100 MHz generator is to run simulator.
Parts are .389 uH coil, 0A91 fast switching diode, one Jfet MPF102 or 2N3819 transistor. Other parts are shown.
Circuit range is listed 70 MHz through 150 MHz. And detects AM, FM, or carrier wave only in these frequencies.
