TechNewsO – Every Thing About Technology › Forums › Topic Tag: thyristor. Viewing topic 1 (of 1 National expresssunpak auto 144d thyristor manual +840+. Results 145 - 192 of 823 Sunpak Thyristor Auto 433D Shoe Mount Flash for Nikon with .. Sunpak AUTO 144D Thyristor Camera Flash in working order. Explore. 23 Jun 2007 I believe it is strictly a thyristor controlled unit, no manual settings at all even). as leonyu13 says, it's strictly an automatic thyristor flash. Is the Sunpak auto 144 D compatable with my Canon. This is a yes I need a sycn cord (patch cord) for a Sunpak 544 auto thyristor flash unit. Where do I get 3 Jun 20163 Apr 2015