This circuit is better than the previous one in that the control is isolated by a transformer. The transformer has 110 or 220 V primary and 6.3 to 12 V secondary with 200 to 500 mA current.
This circuit for UHF between 800 and 1 000 MHz was found in an American documentation from the...
This circuit was found in a Signetics documentation from the 1980s. The integrated is a PLL and...
This circuit uses incandescent lamps for the 110V or 220V grid. We found this configuration in a 1989...