May I suggest the use of PVC pipe as a form for winding the
coax? Tape it in place while you're "monkeying" and then fiberglass it
when
you like what you have. (Auto supply stores sell the fiberglass for doing
auto body work -- it's durable & light-weight.)

KD6VKW
ET USN (ret)


That sounds like a good idea - and I have used pvc forms myself.
I wonder if ecasing the coil in that 'Great Stuff' spray foam would be ample
protection ?

my 2¢
W4PMJ