This 1924 receiver uses a battery for the tube filaments and a high voltage battery for the amplifier and detector circuit. The speaker is kind of high impedance era.
This circuit monitors the current in the negative line. The circuit is from a 2005 Linear...
This current sensing circuit for applications up to 10 A has been found in a Linear Technology...
We found this circuit in an old American publication. It is possible to test common FETs using a...