This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer available that timer and the transistors are germanium types. The circuit is intended to receive MW stations.
Found in an Electronic Design from the 90's, this circuit indicates three voltage levels by...
This circuit was found in a 1965 General Electric documentation. It is intended for reception of the...
This filter was found on a 90's Radio Electronics. With the components used the cutoff frequency...