Found in Analog Devices documentation, this circuit uses components from the time. Formulas for component calculations are given along with the diagram.
This 1968 Texas Instruments circuit uses diacs of the era. SCRs can be modern equivalents according...
For the 400 to 500 MHz bands, this circuitry found in an 80's documentation uses a very critical...
This amplifier for FM antenna signals was published in Radio Electronics magazine in May 1963....