[Antennas] Multiband antennas

Sat Sep 18 14:41:48 EDT 2004

Kevin:
(your address direct does not seem to work for me)
Let me know how you make out, please.
My 88ft antenna is an inverted "V" apex about 32ft, ends about 20ft final ends
about 15ft. The ends had to be bent at about 30 degrees away from the main run
of the antenna in plan view. The feeder line was made from extra wire with
plastic conduit cut to maybe 4in with holes about 1/4 in in from end, heat gun
glued. The final into the shack is 2 coax lines to tuner. Works well on 40 but
not on 75, but I think that is the tuner.
Best of luck and have fun.
Chris opr VE7HCB
I am definitely going to the 88 foot antenna. The difference between
mine and Cebik's is that mine isn't quite as high as he shows the one
he works with and will be in an inverted vee configuration instead of
a flat top. I have hopes my tuner will allow me to tune 80 and 40
along with the three WARC bands. That is my goal. I can only try. 
<GRIN>
Thanks much and very 73. 
Kevin :)
Amateur Radio: K7RX
Navy Marine Corps MARS: NNN0SHS
-----Original Message-----
From: Chris BONDE [mailto:ve7hcb at rac.ca] 
Sent: Friday, September 17, 2004 15:05
To: antennas at mailman.qth.net; k7rx at comcast.net
Subject: Re: [Antennas] More Questions on Multiband Antennas
I agree with Dave on the 88ft all band antenna. Go to Cebik's web
page for many ideas. He has done a lot of work on the 88ft, why etc. 
However, I cannot make it work on all bands. Tuner, tuner. I had
some expert help as well from this reflector to make it work. It does
very well on 40m, 10m but not 75 etc.
Made my own 600 line as well.
But more than likely it is the configuration that causes the tuner not
to be able to tune certain parts of the band.
Chris opr VE7HCB
 Hi Again Kevin
Well the reason you got the loop recommendations is because to the way
you worded your question. you wanted an antenna that was high angle on
80 and low on the upper bands and the horizontal loop fills that
request very nicely. But to answer your question . 102 feet is not a
magic number other than it represents about the shortest antenna that
will operate very effectively on 80m. Not that other lengths are bad
just that this one fit the bill for most people , plus it was
popularized by the late G5RV. His criteria were quite a bit different
than most people believe however he was not originally trying to build
an all band antenna and the 102ft length has some problems on bands
above 20meter when fed the with a matching stub and coax. it is not a
good 30 Meter antenna either though i've used them on that band there
are much better antennas on that band. Some claim that 88 feet is a
good compromise for an all band antenna- But you better have a good
tuner with that one also. 
It Really depends on what your trying to do.. and as many have found
out over the years it is difficult to find one single antenna that
will do what your asking for all bands. If you must stay with the
inverted vee configuration you may want to try a trapped dipole. since
it will do somewhat what you were asking in your original question.
other than that or the loop you will find the antenna you are
currently are using is not a bad choice. 
73 Dave 
-------Original Message-------
From: k7rx at comcast.net
Date: 09/15/04 01:09:59
To: antennas at mailman.qth.net
Subject: [Antennas] More Questions on Multiband Antennas
Hello All,
When I asked my question concerning recommendations for multiband
antennas which I might use to replace my current inverted vee which is
60 feet per side and fed with window line, the only recommendations I
got back were for full wave loops. While this is ultimately my dream,
I don't have the real estate presently to put up one of these. So, I
am back to trapped or other types of antennas. To be honest, I'm not
finding much in terms of dipole antennas trapped for the WARC bands as
well.
In conducting research on the net, I keep seeing the figure of 102
feet pop up again and again. This, of course, is the length of the
classic G5RV and I have found at least two other references to
multiband dipoles for 80 and up with a length of 102 feet. Is there
something magical about this length? This may sound silly, but is
there a magical suggested length for the non resonant dipole for 80
and up? Is 102 feet this special length?
I would appreciate any thoughts any of you might share with me on this
question. Thanks very much and very 73.
Kevin :)
Amateur Radio: K7RX
Navy Marine Corps MARS: NNN0SHS