On Apr 23, 3:21*pm, Cecil Moore wrote:

I have measured the delay through a 75m bugcatcher coil.
It was approximately 25 nS, a magnitude greater than
w8ji's "measurements". It doesn't matter if my measurements
were off by 20%. The magnitude difference between my
measurements and w8ji's "measurements" is too significant
to be ignored.

Cecil: that's a very significant result. If I feed the dimensions of
W8JI's coil into Equation 32 in the Corum Bros. paper it predicts an
axial Velocity Factor of 0.33. That would equate to a delay across the
10" long coil of 24.7nS !!!!!

Regards,
Steve G3TXQ