SD/WH  (1959 April)
Strand

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.

See also:

• CRD Dimmer Rack (1963)
• Permus (1982 - ?)

Catalogue & Journal Entries for SD/WH in the Backstage Heritage Collection

The Evolving Dimmer Rack (1993)

Back to Dimming and Multiplex (Strand)