"J. Laub" wrote in message
...
Mogens wrote:

"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?


Is it ground mounted? And what kind of radial are in use (if any).

Does resonate in your terms mean that you have a low swr?

Mogens


Yes, ground mounted and using 4 5-1/2ft radials. Bad word choice in orig
post-poor SWR is the problem. The other poster mentioned my pipe diameter
may be an issue. Am looking into that now.

First change the radials to 11 feet, and then see what happens. Your SWR at
resonance should be 1.5:1.

Tam/WB2TT