I am modifying some DSS satellite feedhorns for use at 10 GHz.
Wondering if JB Weld is electrically conductive after it sets up. I was
thinking I would use JB Weld to build up the outside of the "waveguide"
since after boring it out to 3/4" will only leave a wall thickness of
about 1/16". That doesn't leave much meat for the two machine screws
that will be used to mount the panel mount SMA connector to screw in to.
That's only about 2.5 threads if I use 4-40 hardware or 3.5 threads if
I use 2-56. Not sure what size holes are in the SMA, which will dictate
which hardware will have to be used. God forbid if it takes a 6-32
screw to do the job (2 threads). The mounting screws can not penetrate
into the waveguide. Any other ideas?

Something else I just thought of...once the JB Weld has set up, will I
be able to tap threads into it?

Scott
N0EDV