"J. Laub" wrote in message
...
I've constructed a 1/4-wave 15m vertical from 11' of 3/4" copper tubing
(water type). It's being fed with coax.

Much to my frustration, I am unable to get this thing to resonate w/o the
use of a transmatch. Any tips, ideas or good plans?

73's

-=Jon

Jon -

One of the old ARRL Antenna Handbooks (Green cover - circa 1973) had a 15
meter dipole constructed form 2 piece of 1/2 inch 10' electrical conduit and
a small coil wound from 1/8" copper or brass tubing (50 ohm coax fed).

The impedance for a vertical will be quite low (less than 50 ohms) what are
you using for matching?

15 meters / 4 = 3.75 meters (1/4 wave) ~ 12.3 Feet

Greg
w9gb