This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals with 1 Vpp at 50 ohms load. Used transistors are still common today.
This circuit was found in a 1967 RCA publication. The circuit uses components from that time, and...
This windshield wiper timer was obtained in an 80's Hands On. The transistor can be the BC548 and...
Several configurations equivalent to this can be found in this section. This was found in a 1970s...