[TowerTalk] Shielding - slight OT

[Bill Ogden]

A quick real story -- Long ago and far away (Southeast Asia) we installed 
a small computer system. It had a problem. At fairly regular intervals 
(about every 15-20 seconds, IIRC) it would often take a "red light" error. 
A bunch of people worked on it; various components were replaced, etc, 
etc. Nothing helped.  One day a team member was looking out a window and 
happened to notice that a radar antenna seemed to have the same period of 
revolution. A quick check verified the problem. A roll of common aluminum 
foil (from the PX), hung in overlapping strips, temporarily solved the 
problem. The machine was later moved to a different location. I cannot 
remember the exact details of the foil placement. 

The goal of shielding a ham shack is not quite the same thing, but a 
simple foil "wall" did work in at least one instance.

Bill
W2WO