This circuit was found in specialized microwave documentation from the 1960s. The circuit makes use of a varicap, and the transistor is a microwave type.
This 4.5 MHz amplifier is suitable for analog TV applications. We found it in a 1967 Philips...
This circuit is one of many that can be found in this section using the 555. This circuit was...
We found this circuit in the 1994 National Semiconductor Linear Applications Handbook. The circuit is...