wrote in message
...
that about sums it up.

stub matching looks attractive, but how do I actually build one of
these suckers? Do I have to carve out a piece of coax and then fit
another one into it, if that makes sense? Won't that be nearly
impossible to solder?

physically, it would be easier to make a stub section with sections of
single wire line, but I don't know how to find Z0 of my 14 gauge wire?

Is stub matching not the answer?

The antenna is designed for about 450 Mhz, if that helps anyone.

Thanks for your help.


Hi

I consider 160+j140 to be an impedance that would be too difficult to
match to 50 ohms. Any small error will produce a major variation from 50
ohms. Would you consider re-designing your Helix?

Dr Cebik has a good article on Helix Antennas at
http://www.cebik.com/ao/ao15.html.
VE3NPC has published alot of information on how to match helix antennas.

I have some AMSAT Journals with some of VE3NPC "blueprints" of 450 MHz
helix antennas. I'd scan the pages for you if you cant get his article
thru the Internet.

Jerry KD6JDJ