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.
We found this circuit in an old documentation, but it can be easily assembled, as it is based on...
In the figure we have a simple timer with the 555 feeding a relay directly. The circuit is from...
Found in an American amateur radio documentation by the name of “antennascope” this circuit is...