Jerry Martes wrote:
No Cecil, I didnt. Maybe I wrote my address wrong.

I think the Reply All feature on my newsreader must not be
working. I didn't get any notice that it didn't go through.
I'll send you a regular email.

I figured you realized that the HP Vector Voltmeter wasnt capable of
providing the data needed for this discussion.

Here's the procedure for measuring the electrical length of
a base loading coil. That's the same as the delay through
the coil.

1. Mount your base loading coil on your vehicle and remove
the stinger. Note that the current is zero at the top of
the coil with the stinger removed.

2. Use an antenna analyzer, like an MFJ-259B to locate the
self-resonant frequency. It will be the first frequency
going up in frequency for which the reactance is zero and
the resistance is very low. My 75m bugcatcher coil has
a self-resonant frequency of 6.6 Mhz which is an
electrical 90 degrees at 6.6 MHz.

3. Calculate the length of the RF cycle at the self-resonant
frequency. 1/6600000 = 152 nS for 360 degrees at 6.6 MHz.
The coil is an electrical 90 degrees long on its self-resonant
frequency so the delay through the coil is 152/4 = 38 nS.

38 nS is also the approximate delay through the coil when
used as a base loading coil on 4 MHz. One RF cycle on 4 MHz
takes 250 nS so 90 degrees (1/4WL) of that cycle is 62.5 nS.
The coil is providing 38/62.5 = 61% of the antenna on 4 MHz.

Forget the bogus coil delays posted by the "experts". They
are measuring standing wave current which is known not to
change phase on either end of the coil and it doesn't do a
bit of good to measure something that doesn't ever change.
--
73, Cecil http://www.qsl.net/w5dxp