different formulas for different K factors or the density of the material being utilized but ALL formulas will get the antenna builder in the ball park, the rest is just fine tuning.
At upper HF frequencies the RF s on the outside of the conductor.
2% difference may move resonance up or down from the target frequency.
Not so much where the common vswr meter can detect a difference.
At upper HF frequencies the RF s on the outside of the conductor.
2% difference may move resonance up or down from the target frequency.
Not so much where the common vswr meter can detect a difference.