We present the circuit of the commercial transistor tester Sanwa SC2 sold in Japan in the 1960s. The circuit has several scales and types of test being powered by a 22.5 V battery.
Found in a 1968 US publication, it is a font filter. The transistor is according to the desired...
This circuit was found in an American publication from the 70s, but it can be assembled with more...
Found in a 1995 Hands On-Electronics, this circuit generates a sinusoidal signal whose frequency...