I've attempted to build several Resonant Feedline Dipoles for 10
meters, and so far they seem to be flaky at best. The first one I
made out of about 25 feet of RG-8M coax and it came up with about a
1.5:1 SWR, but the rest had high SWRs. I may have used a ferrite core
for the RF choke instead of the coiled coax on the first one, but I
don't remember for sure. I tried to make another one out of some RG-8
foam with coiled coax for the choke, and it never would tune up. On
two other occasions I tried making RFDs with RG-58 and coiled coax
chokes, and the SWR was 1.8 on one of them and out of sight with the
second one. Has anyone else managed to consistently make RFD dipoles
with low SWRs, and if so what type of coax and choke were you using?

Thanks

-TD

On Fri, 21 Jan 2005 13:58:37 GMT, (Terra
Dactyl) wrote:


I've attempted to build several Resonant Feedline Dipoles for 10
meters, and so far they seem to be flaky at best. The first one I
made out of about 25 feet of RG-8M coax and it came up with about a
1.5:1 SWR, but the rest had high SWRs. I may have used a ferrite core
for the RF choke instead of the coiled coax on the first one, but I
don't remember for sure. I tried to make another one out of some RG-8
foam with coiled coax for the choke, and it never would tune up. On
two other occasions I tried making RFDs with RG-58 and coiled coax
chokes, and the SWR was 1.8 on one of them and out of sight with the
second one. Has anyone else managed to consistently make RFD dipoles
with low SWRs, and if so what type of coax and choke were you using?

Thanks

-TD


In this article http://www.io.com/~n5fc/rfd.htm there were similar
problems. Maybe there are better antennas to try.

bob
k5qwg