Time relay on transistors "Silhouette".Time relays, timersThe time relay on transistors "Silhouette" was produced presumably since 1979 by the Tushino machine-building plant. It is used for semiautomatic dosing of exposures (control of the lamp burning time) of a photographic enlarger for contact or projection photographic printing. Auto exposure results in the same exposure of prints and the developed images have the same contrast and light or color saturation. The relay also allows you to control the lighting lantern (red lamp). Transistor circuitry. Exposure range 10-100 sec. Setting accuracy 1 sec. The maximum power of the magnifier lamp is 100 W. Power supply - 220 V.