26-159-16 (for the male connector) 26-190-16 (for the female connector)
I am also planning on making an extender cable, but I was wondering about the cable itself.
Is it safe to use a regular multi-conductor cable? With potentials as high as 500V (between -150V and 350V), it seems to me that it might be a problem to use an ordinary cable (e.g., cutting up a VGA cable). Maybe it would be ok if I ensured the -150V connector wasn't adjacent to the 350V connector in the bundle (if that is possible). I tried looking for cable rated at 500V on Mouser and Digikey but it seems hard to find or prohibitively expensive.