[HomeBrew] Coil linearity?

[kwylow zinjanthropus]

All: 
Just wanted to know this. Is coil inductance linear with respect to turns? For example, if I wound a coil evenly at 10 turns and it is valued at 1 uH, can I assume that each turn is 0.1 H and that winding 5 more turns would make the coil value 1.5 uH? I'm trying to wind a 30 meter coil for that AC-1 replica that I just built. The 40 meter coil is about 15.5 tpi and the plate of the 6V6 dips at about 10 % of the plate cap value and the antenna load cap doesn't affect the power out that much into a dummy load (50 ohms). I guesstimated the plate cap value to be about 36.5 uuF (10% of 365 uuf) and reverse engineered the coil to determine a value of the 40 meter coil (wound with #22 magnet wire at 15.5 tpi). Of course, I used the formula freq=1/(2*pi*SQRT(L*C)). Calculating the final turns per inch for a coil with the plate cap at 25% (or 91.25 uuF) yielded a coil at 7 tpi #22 magnet wire resonating at 10.115 MHz. 
Let me know your thoughts on this and thanks. Cal, N6KYR. 



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