[TowerTalk] Coil Design

[Patrick Greenlee]

Lexan strength advantage over plexiglass degrades with exposure to UV.

Patrick     NJ5G

On 7/31/2015 12:04 PM, TexasRF--- via TowerTalk wrote:
> And a variation of this scheme is to drill holes near the edges  of the
> insulator. Then you can "screw" the inductor through the  holes.
>   
> Poly carbonate material is more robust than plexiglas. Lexan is a well
> known variant of poly carbonate.
>   
> 73,
> Gerald K5GW
>   
>   
>   
> In a message dated 7/31/2015 11:48:36 A.M. Central Daylight Time,
> infomet at embarqmail.com writes:
>
> I think  this is optimistic, considering skin effect.
> I’d use 6ga solid or, to be  really neat, 1/4” copper tubing.
> Either could be supported by a sheet of  plexiglass with notches along the
> edges.
> You wind on a form and then thread  the coil onto the support.
> See woodworkers’ box joint on Google, if you  want to make accurate
> notches.
> https://www.google.com/search?q=box+joint&oq=box+joint&aqs=chrome..69i57.443
> 1j0j7&sourceid=chrome&es_sm=93&ie=UTF-8
>
> The  fancy CB coils are neat, but don’t have enough inductance.
> Quick and dirty  (my specialty) would be strip some 10ga romex, leave the
> insulation on, and  wind on PVC  pipe.
> WL
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