This variable frequency oscillator for radio transmission covers the range from 1.6 MHz to 20 MHz, depending only on the coil used. The circuit is very stable and can be used in amateur equipment.
This low frequency doubler requires a 50 mV signal at the input. The circuit is from an old...
We found this circuit in GE's 1977 transistors manual. Transistors admit equivalents according to the...
This transistor tester circuit has the advantage of using a constant current source in the tests....