[TowerTalk] Weatherproofing for copper coils?

[Steve Miller]

Towertalkers,

I am upgrading Cushcraft 402-CDs. The plan is to replace the stock 
loading coils with high-Q coils made from 1/4 inch copper tubing.  
I'd prefer to apply a low loss protective coating directly to the 
copper tubing rather than construct housings for the coils.  

Heat shrink tubing seemed a possible solution but finding the right 
combination of UV resistance, low RF loss, and price has been 
unsuccessful.  (PTFE heatshrink has good properties but runs almost 
$2/foot.)  

Are there any low loss paints or coatings that adhere well to copper 
and can withstand a north Texas environment for several years?

Any suggestions on how best to weatherproof the coils is welcome....


Steve



-- 
Steve Miller   N8SM   millersg@dma.org   http://www.dma.org/~millersg

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