Abstract: The introduction of the beam index cathode ray tube(CRT) as an airborne pilot display unit imposes tightperformance requirements on the associated high voltagepower supply (HVPS). Previous HVPS technology producedupwards of 25,000 Vdc (25 Watts) anode potential withplus or minus 0.1% regulation allowance (100 Vpkinstantaneous deviation). Beam index technologyrequires a HVPS of higher anode potential and 100%tighter regulation. This and other demanding electricalrequirements of beam index CRT HVPS are presented inthis paper, together with design approaches to meetthem. The HVPS output power density, thermal stability,and dynamic focus performance were all improved. !0
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