Found in a Popular Electronics from the 90s, this circuit makes use of an unusual integrated today. The coils are for the medium wave range.
This filter with the 741 op amp was found in the February 1995 Electronics Now magazine. The power...
Found in an American documentation from the 90s, this circuit makes use of an output transformer for...
This directed coupled amplifier uses a transformer to drive a low impedance loudspeaker. This...