Found in the September 1992 issue of Radio Electronics magazine. This circuit generates pulses that are determined by C3. The circuit has output pulse intensity and timing adjusted by R6.
This voltmeter has an input resistance of 200 M ohms (47 M ohms resistors can be used in series to...
We found this circuit in an old documentation, but the components used offer no difficulty in obtaining...
This old 1967 audio preamp uses germanium transistors. It was found in Japanese documentation at...