This commercial transistor tester circuit (EICO 666) is from a Japanese publication from the 1960s. The switch selects the types of test with the switching of the terminals and the gain ranges.
This circuit is from Motorola's 1993 Linear Interface ICs. The circuit must be powered by a...
This transmitter for short range in the medium wave range was found in a Raytheon publication from...
We found this circuit in a 1977 publication for radio amateurs. It serves to test general purpose...