PREHEATING_PROGRAMMED_LAMPS

Published:2009/7/12 23:54:00 Author:May | From:SeekIC

Minimizes thermal stresses on lamps and controls when programmed operation is repetitive for large number of cycles. Ujt control circuit provides preheating of lamp by triggering light-activated scr late in each half cycle. Setting of R2 determines minimum lamp current to maintain filament temperature just below visible leveL- Silicon Controlled Rectifier Manual, Third Edition, General Electric Co.1964, p216.



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