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 was found in the August 1997 Electronics Now magazine. The circuit uses well-known...
With this circuit, a single antenna can be used to receive TV and FM signals (VHF), separating them for...
The circuit shown has the component values calculated for a frequency of 1 kHz. TL064 can also be...