This circuit shows how to make an adaptation on an AM receiver to receive CW and SSB signals. The circuit is from an 80's documentation. The diode is commonly used.
We found this circuit in a 1965 publication by General Electric. The zener is 8.2 V x 1 W and the...
This circuit was obtained in an Electronic Engineering of the 90s. The operational amplifiers and...
This circuit is suggested by Texas Instruments in his Optoelectronics Sourcebook. The transistors...