This circuit uses uncommon Texas Instruments components today. The circuit is from an American documentation. Transistors are commonly used PNP. The display is 7 segment multiplexed.
This circuit for the 3.5 MHz band (80 meters) was found in an old radio amateur documentation. The circuit...
This JFET amplification stage was found in the April 1993 issue of Electronics Now. The input...
We found this circuit in a Popular Electronics of the 80s. The circuit can be made with almost any...