[TowerTalk] inductance of tubing vs bar or strip

[Charlie Gallo]

On 8/18/2009 Roger (K8RI) wrote:

>  BTW drilling and tapping copper for even 1/4-20 or 1/4-28 
> can be a chore and very difficult for the smaller sizes such as 12-24,
> 10-24  even when using the proper cutting oil.

I know the reputation for copper being hard to drill/tap, but I've never found it that bad.  Particularly with tapping, I'd make sure I was only trying to do say a 60% thread or so.  What I have NOT tried, and MIGHT work well is a "thread forming" tap, taking advantage of the coppers ductility

-- 
73 de KG2V

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