Voltmeter VTVM (T131E)

We find this circuit in documentation on tubes of the 1940s. The circuit applies to other triodes and the instrument is a milliammeter of 0 to 1 mA.

Common Power Supply Circuit Bridge (CB6070E)
This circuit was suggested by Siliconix in a 1980s publication. The circuit uses components from the time...
Capacitive Load Amplifier (CB4903E)
We found this circuit in an old American documentation. The circuit can be applied to modern...
500 MHz Probe (CB3918E)
This circuit is intended for use with common oscilloscopes having been found in documentation on...