Found in Radio Electronics magazine from 1959, this high-fidelity amplifier has 15 W of power. Power supply was not provided.
This conventional slow-moving circuit uses incandescent light bulbs, but can be changed to use...
Found in a 1969 documentation, this neon lamp circuit may have the number of steps increased. The power...
This circuit for 6 lamps was found in old American documentation. The supply is of high voltage...