This constant current source for high voltage loads was obtained from a 1967 General Electric documentation. The components are of the time, but allow equivalents.
Standing wave ratio or SWR is an important measure of whether all power from a transmitter is being...
The circuit presented is from LinearTechnoloy Applications from 1993. Semiconductors are uncommon and...
This circuit was found in a 90s Popular Electronics. The sensor can be any phototransistor. ...