This 4-waveband converter circuit was found in Radio Craft September 1948. The power supply is not given, but the supply voltages are indicated.
This 1970 General Electric circuit is an equivalent configuration to the previous one with PNP...
This circuit was obtained in a Texas Instruments 2012 documentation, which consists of a current...
We obtained this circuit in a Maxim documentation from the 90s. The circuit is based on the...