Thanks for the info and advice!! It turned out not to be a shocking experience for me and the unit had a 1.65 trigger voltage.

Greetings! If I understand the discussion correctly, I should be able to use any Pentax branded flash in manual mode with my Pentax dslr. My specific interest is connecting my auto strobonar 772 (circa 1972) to my ist* ds. In order to do this I would need a hot shoe to pc adapter. The question of the trigger voltage has me in an uncertain state. How is this measured? Are there instructions somewhere? Is this even an issue with this old of a flash? I would appreciate any thoughts, info, or leads you would care to share.

Dave Bauer