[Hammarlund] purpose of tube shields

[Kenneth G. Gordon]

On 25 Sep 2014 at 14:49, Mike Pagel, K9UW wrote:

> There is an interesting explanation of the purpose of tube shields at:
> http://www.qsl.net/kh6grt/page4/shields/shields.htm
> 
> I remember reading a magazine article, decades ago, about making shiny tube
> shields darker by boiling them in salt water.  If I can't find it online, does
> that mean my memory is faulty?

Probably not. 

BTW, vinegar works pretty well for that too...

Ken W7EKB