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.
The presented circuit was found in the National Semiconductor FET Databook. The setting applies to other...
This configuration with the LM383 appears elsewhere on this site. The circuit shown was obtained...
This very high input impedance preamplifier is from a publication of 1977 but can also be mounted...