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 circuit was found in an English magazine from 1973. The magazine no longer exists, but the...
January 2017 - Mouser Electronics is introducing new, ultra-thin Vishay Displays OLED modules. The new...
This circuit is from the 1960 Mullard transistor manual. The transistors are germanium from the...