Leigh,
My doublets work great on the higher bands. In theory, the lobe
configuration does changes with wavelength n of the wire, so you have
roughly 2n lobes. But you also get some gain, and, more importantly, a
lower peak angle of radiation. You can read all about it in W4RNL's
great
The 80 m dipole feed with ladder line and a tuner can work well even with
multi lobes on the higher bands.
See any edition of the ARRL Antenna book or handbook for typical patterns,
or www.cebik.com antenna web site for patterns. If you take into account
the lobe directions you will have fine
Hi Guys, my main rig is a K1 feeding a multi dipole for 80/40/20 with no
ATU. I am thinking of taking down the dipoles and trying a full size G5RV.
Questions:
Will the KAT1 ATU tune up on all bands from 80-15m
I will be using about 80 feet of 50ohm coax to get from the matching
section
While the G5RV has a lot of advocates for multiband use, it works much
better if you bring the parallel feedline all the way to the tuner. When
used for multiband, with coax and the matching section, you will likely find
a higher than desirable SWR on the coax except on 20 meters. I have found
Martin,
Before going to a G5RV, I would try feeding your 80 m dipole with 450
ladder line to a (good) 1:1 current balun and use a short run of coax to
the K1. I use this setup to feed 102' and 44' wires. My Ks tune them
on any of the bands they cover (you need a bit of additional L/C help on
It was stated:
Hi Guys, my main rig is a K1 feeding a multi dipole for 80/40/20 with no
ATU. I am thinking of taking down the dipoles and trying a full size G5RV.
Don wrote:
... I have found the claims for the G5RV antenna to be highly exaggerated.
For good unbiased information on the G5RV
Hi Guys, my main rig is a K1 feeding a multi dipole for 80/40/20 with no
ATU. I am thinking of taking down the dipoles and trying a full size
G5RV.
Questions:
Will the KAT1 ATU tune up on all bands from 80-15m
--snip--
Howdy Martin:
Since you are
What is the difference between the G5RV and the twinlead-fed 102'
doublet with a current balun at the coax-to-balanced transition
mentioned as an alternative? Is it just the random length of twinlead
rather than a calculated length? Or is it a long run of coax vs. a
short one?
I know some
Your multi-dipole will be more efficient on 80 meters, and can be fed
directly with coax and no tuner. If I were in your shoes, I would leave
well enough alone unless there is some other overriding reason to change
it.
FWIW I had a multi-band trap dipole from Spi-Ro that worked OK but was
Sorry, Don. I didn't mean to spam you, I forgot to make sure the TO:
address was going to the reflector!
I meant for this to go out to everyone. Sorry
Original Message
Hi, Guys.
The thing you have to remember is that the G5RV originated in the days
of final
amplifiers
Certainly, traps and baluns may contribute some losses as well as loading
coils may.
Tune losses in a decent tuner are pretty low, unless you are trying to match
outside its design range.
There is no advantage save not having a reactance term to match out, to
having resonance on the antenna.
The G5RV may work well, but I doubt if it'd work better.
For most of my Ham career my mainstay antenna has been a doublet. That's a
center fed wire as long as I can make it (seldom over 150 feet since and
currently only about 50 feet) and as high as I can get it. It's fed with
open wire line
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