This Schmitt trigger in current mode for frequencies up to 50 MHz was found in a 1969 Motorola manual. Appropriate switching transistors can be used.
This circuit was found in an ancient American documentation. The integrated circuit is of the time...
Found in an older Radio Craft, this circuit covers the aerial band from 118 to 136 MHz. No...
This amplifier was found in a Radio Electronics of the 90s. The circuit uses unusual operational...