22swg wire [was: Magnet wire]
Hi again Alex,
I had a closer look at the enamelled wire data given in the Maplin
Catalogue. It actually states that the 250g reel of 22swg wire has a
length of 70 meters. The only reel that has the 1.5km you stated is the
38swg, which is £5.29. If you wound this on an 8" diameter form, then
the total height of the coil would be:
Diameter 8" = 20.32cm
Circumference = pi * 20.32cm = 63.84cm
Number of turns on coil = total length of wire / circumference of coil
= 1500 meter / 0.6384 = 2350 turns
The height of the coil = diameter of wire * number of turns
= 0.15mm * 2350 = 0.353 meters or about 14 inches
So an 8" diameter coil 14 inches high, will have 2350 turns when wound
with 38swg enamelled copper wire.
Again, check my calcs.