[Antennas] Dipole "Multi-band" pairs?

[Philip Atchley]

Hi All,

I realize that when making "fan" multi-band dipoles, even harmonicly 
related bands are best (7/14MC etc) due to the unused dipole being of 
higher impedance.  How about Non-harmonically related.  As they are 
going to be used as guy wires on a push- up pole and their relative 
lengths, I'm proposing the following "band pairs".  The legs of each 
'pair' would be 'approximately' 90 degrees apart, guy wire fashion.

1.  7.2 & 10.1MC for the  topmost Inverted Vee pair, perhaps using the 
7MC one for 21MC also.  Are the 7 & 10MC freqs too close and would they 
interact too much?
2.  14.2 & 28.6MC for the next lower pair on the mast.  alternately this 
antenna MIGHT turn out to be a 14/21MC pair.  They will be mounted lower 
than the low freq antennas to keep the Apex angle a little wider and to 
space them away from the lower band antennas.

Does anyone here see a 'problem' with these band 'pairs'.  They will be 
mounted above a sheet metal mobile home roof where the present 21MC 
single band Inverted Vee performs well as does the half sized G5RV that 
these antennas will replace.  The new Butternut HF-2V is performing well 
on 75/40M and will remain.  I'm trying to ELIMINATE the use of a antenna 
tuner as much as possible!

 
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73 de Phil,  KO6BB
If it's over 1dB above the Noise Floor, "IT AIN'T DX"!

THE BEACONEER'S LAIR:  http://www.geocities.com/ko6bb/
QSL GALLERY: http://photobucket.com/albums/y123/KO6BB/
Merced, Central California,    37.3N  120.48W  CM97sh

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