Jim Lux wrote:
Cecil Moore wrote:
In that particular coil at 4 MHz - no, it cannot be done.

measuring the phase shift between two sinusoidal currents at 4MHz to a
precision of hundredths of a degree is easy.

Jim, you misunderstood what I was trying to say and that is:
It is impossible to measure a 3 ns delay through a 2"dia,
100T, 10" long coil at 4 MHz because the delay is much longer
than 3 ns. It is closer to 30 ns.

I DID NOT say it is impossible to measure a 3 ns delay at 4 MHz!
I said it is impossible for that coil to exhibit a 3 ns delay
at 4 MHz, therefore 3 ns is not a possible measurement value.
--
73, Cecil http://www.w5dxp.com