On Thu, 25 Sep 2008 18:33:11 -0500, "Howard Kowall"
wrote:

yes i have built a dipole and it works good with the manual tuner
BUT now my new rig has a built in tuner and of course it wont tune it
the dipole i built was cut for 3.747mhz and works great without a tuner
but with the auto tuner it wont tune anyware but 80mtrs
is there a magic number for a dipole to make it tunable on 80 and 40



A popular antennas over here in the UK is a centre fed doublet,
80 to 100 Foot top with 450 ladder line feeder into your ATU. You
will need a balun near the shack end if your ATU is coax only input.
This makes feeder access into the shack easier than balanced feeder
coming in. DX Engineering makes excellent baluns for this purpose.
This antenna will work all HF bands, 80m and up.

At the moment I have an 80m inverted V dipole and a 40 metre one fed
with the same RG213 coax (about 60 feet of the stuff). These antennas
work worldwide DX very nicely, even though the apex is only up at 32
feet. NO atu needed :-)./ However I'm shortly going to erect the
doublet described abovce so that I can work all the WARC bands as
well. I already have a 3 el beam for 10/15/20m.

73

Peter G3PHO