Risto Tiilikainen wrote:
I wouldn't try perspex nowadays
Perspex itself is very lossy when compared to modern compounds
I think perspex absorbs easily humidity and then you may have problems.
Specially in voltage maximum points of helical.
For the same reason I don't recommend fiberglass for outdoor use.

I recommend Teflon or nylon for insulators and supports.

I have read that toothbrush handles work very well. I'm not sure how you
would use them to mount a helical antenna, but with it in front of you,
it might be easier to figure out.

73,

Geoff.


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