We found this circuit in a 1967 IEEE documentation. The circuit uses discrete components of the time based on the 1.13 MHz frequency used with oscilloscopes at the time.
Using a common crystal diode and a 741, this circuit can be used to detect microwaves. The circuit is...
The two circuits shown show how to obtain an SSB / CW control for receiving this signal top at a...
The oscillation of the relay causes the applied audio signal to deform and start to resemble the...