[TowerTalk] 160 meter odditiy

Jim Brown jim at audiosystemsgroup.com
Wed Jan 7 18:01:59 EST 2015


On Tue,1/6/2015 6:08 PM, john at kk9a.com wrote:
> #12 wire is 0.080", #8 is 0.128.  This is not a big enough diameter change to make a difference.

A better way of saying that is that the difference is probably too small 
to matter, and does not account for what John is seeing. What CAN make a 
difference is insulation. While I haven't measured it, the insulation on 
THHN (ordinary house wire) lowers the resonance by a small amount, 
perhaps 1-2%. NEC does a calc for this if you enter the properties of 
the insulation and its thickness. It also accounts for conductor diameter.

73, Jim K9YC


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