Hi John,
Thanks for the pix!
I think I've found a way to make it work.
1. Got some brass tubing that is just about the same
diameter as the rg-8's center conductor & poly.
(might have to use some silicon grease to make it
slide a bit easier).
2. Solder top of brass tube to side of the heliax's
copper center conductor.
3. Wedge some foam or other non-conductor down
inside the heliax to make sure the brass doesn't
move around. (this shouldn't have any affect on
the capacitance between the RG-8's center & the
brass tube).
4. Solder brass screw with 2 nuts to end of RG-8's
center conductor.
5. More mechanical stuff here, but too many words
to use. Will take pix when I'm done.
thanks,
Tim