This high impedance amplifier is from 1985 documentation by General Electronic. The amplifier with FET at the entrance is from the period and the source is 9 V.
This useful instrument has dual function, operating both as signal injector and continuity tester. The...
This fully passive circuit was found in documentation from the 1970s. The circuit uses an optical...
This table with the antenna design allows to size the antenna according to the frequency of the...