[TowerTalk] Stretching THHN house wiring

[Pete Smith]

Is THHN and similar, garden-variety house wire soft-drawn or hard?  If the former, what is a reasonable expectation as to how much it will stretch under, say, 100 lb of tension before work hardening sets in and it stops?  

The reason I ask is that the resonant frequency of my 4-dipole lazy-vee array for 80 seems to have shifted downward about 150 KHz, which would be 4- 5 percent, and I'm wondering if stretching could account for that.

73, Pete N4ZR
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