This receiver was found in an article in Electronics Now magazine in March 1994. The coils are critical, as shown in the figure. Listening is through headphones.
By polarizing the reference with the supply voltage we can use these amplifiers in logic circuits....
This different circuit was found in a Radio Electronics from August 1965. It works with a voltage of...
This is a different circuit for a component from the past, the zirconium arc lamp used in...