This commercial receiver from the year 1958 uses two AA cells as Power supply. The circuit is intend to receive MW station and the transistors are germanium types not easy to find today.
This circuit for the 3 to 6 MHz band was found in a 90s Popular Electronics. The components of the...
This circuit adjusts the drained current to values up to 20 A, allowing the testing of power...
In the figure we have a classic Clapp oscillator configuration for a frequency of a few tens of...