864A_20151002

The Model 864A Simmer Supply is designed to strike and maintain a low-level current discharge
in flashlamps. Initially, the simmer output open circuit voltage rises to a stabilized 1500V. The
simmer trigger output provides an SCR discharge of 520V at 63mJ to drive a trigger transformer.
When the lamp is struck, the trigger pulses are inhibited and the supply provides a constant current
to the flashlamp. Immediately after PFN discharge, the current is boosted automatically to
maintain the arc. An external ballast is not normally required.