We found this 6-tube amplifier in a 1947 publication. It is a Public Address amplifier with excellent performance using triodes on the output.
Of course, with a change in the cable length, the frequency can be changed as long as it is within...
To be used in analog computing, this circuit outputs the difference between the values of the...
This circuit was found in the January 1999 issue of Electronics Now magazine. The circuit uses an...