RadioBanter - View Single Post

March 11th 06, 01:46 AM posted to rec.radio.amateur.antenna

wrote:
What measurement are you talking about? The one I did over two years
ago that has been up on my web site since that time? Something on a
bench?

That one on your web site measured the standing wave
current. We know the phase of the standing wave current
is irrelevent since it is essentially the same whether
the coil is in or out of the circuit. i.e. there is
no such thing as standing wave current "delay" since
the phase of the standing wave current is essentially
fixed at (or near) zero degrees.

You have measured the S12 delay for 100uH at 1 MHz to
be -60 to -70 degrees. What we need is the equivalent
of the S12 delay for current, rather than for voltage.
What is the current delay througn the coil when no
reflections are present? In other words, if the coil
were installed in a traveling-wave antenna, like a
terminated rhombic, what would the delay be through
the coil?
--
73, Cecil http://www.qsl.net/w5dxp