SD/WH (1959 April)
SD/WH Demo Prototype (from Lights! issue 10)
The first 220/240V SCR dimmer
Demonstrated by Strand in April 1959 on the same occasion as the first level memory control. SCR stands for Silicon Controlled Rectifier.
Catalogue & Journal Entries for SD/WH in the Backstage Heritage Collection
Back to Dimming and Multiplex (Strand)