[TowerTalk] Drilling tubing (180 deg)

N7KA at comcast.net N7KA at comcast.net
Fri Dec 28 16:00:03 EST 2007

Using my previous paper for marking a cut line, remove paper from tubing ande flatten it out making a crease in the paper.  Each crease is 180 degrees from the other.   result a NO measurement method of finding opposing holes for drill in round stock material. Just slide the pper back over the tubing and mark the tubing at the crease.  All this takes is paper, some Scotch tape, and a pencil.

For small tubing a "PORTA-LIGN fixture on a hand drill will provide a good thru hole.  Used this method to make 4X14el 2M yagis and 8X16el 432MHz yagis.

Arne N7KA

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