Microammeter (T465E)

Found in a 1948 MIT documentation, this circuit uses a 0 to 100 uA microammeter as an indicator. The power supply is 150 V.

Dummy Loads for Transmitters (CB4120E)
These circuits use loads of 50 ohms to allow the use of a voltmeter in evaluating the output of a...
Center Tap Simulation with Diodes (CB4140E)
In the figure we show how two diodes can be used to simulate the center tap of a push-pull driver step....
High stability thermocouple amplifier (CB4942E)
This other high stability thermocouple amplifier uses an 80's operating. The circuit can be used...