This excellent 30 W tube amplifier appeared in the April 1963 Radio Electronics magazine that taught how to assemble it. The critical components in our time are tubes and transformers.
With this circuit it is possible to divide the frequency of a rectangular signal by values between 2...
This circuit, which we find in a documentation from the 70s, filters out the Ru [occurring in...
This circuit simulates the call tone of a telephone. The transducer is a high impedance capsule, and...