This Hughes circuit is from 1968. Equivalent modern components can be used. The input impedance is 1000 M ohm.
This circuit was found in a 1990 Electronics World magazine. The circuit can be mounted today by...
This 5-band function generator circuit was found in the April 1994 Electronics Now magazine. The...
Frequency Indicator (CB6342E) This simple circuit was found in an Exar publication from the 1970s....