26-08-2026, 03:25 PM
Very nice, neat, piece of kit.
As for the switch-on surge, why don't you throw away the switch bypassing the lamp, and replace it by a relay - the coil of which is connected directly to the isolation transformer?
At switch-on, the contacts are always open, and the lamp in circuit, but as the surge disappears and the full voltage appears across the toroidal transformer primary (typically in a few cycles) the relay energises and bypasses the lamp. No operator intervention necessary!
As for the switch-on surge, why don't you throw away the switch bypassing the lamp, and replace it by a relay - the coil of which is connected directly to the isolation transformer?
At switch-on, the contacts are always open, and the lamp in circuit, but as the surge disappears and the full voltage appears across the toroidal transformer primary (typically in a few cycles) the relay energises and bypasses the lamp. No operator intervention necessary!
