[VHFcontesting] [50mhz] Waterproofing a gamma match

Bill W5WVO w5wvo at cybermesa.net
Mon May 18 21:09:05 PDT 2009

Personally, I like Scotch Type 70 Self-Fusing Silicone Rubber Electrical Tape. 
This stuff is amazing. It's like heat shrink tubing, except without the heat and 
without being tubular. Drawback -- it is an industrial, not a consumer, product, 
and it ain't cheap. If you do decide to get some, here's a hint: Follow the 
application instructions on the box to the letter, or it is likely you won't get 
the kind of stability over time that you can get with this product. Silicone 
rubber, excellent dielectric properties, no detuning.

Bill W5WVO

John Geiger wrote:
> The Gamma match for my Cushcraft A50-3S finally dried out so it is
> now resonanting on 6m again (it was detuned by the rain we had).  I
> am now thinking of waterproofing the match so this doesn't happen
> again.  What is the best way to do this?  I am thinking of covering
> the gap in the open end of the tube with electrical tape and coax
> seal, but will this detune the match again?  I am thinking it
> wouldn't since it should be non-conductive.  Has anyone else on the
> list waterproofed a Gamma match? If so, what works best?
> 73s John AA5JG
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