On Tue, 19 Jul 2011 20:28:54 -0700 (PDT), Jay Scherberth
wrote:

Richard - Is there such a thing as a multi-band HF sleeve dipole or is
this more of a VHF/UHF solution?

Hi Jay,

It is multiband if your tuner can pull the SWR into reasonable limits.
However, you do NOT want the overall length of the antenna to exceed
roughly a 1.25 wavelengths of the highest frequency you intend to
multiband. This is for two reasons at that frequency:
1. Difficult to tune at 1 wavelength;
2. Radiation is directed up at a high angle if longer than 1.25 wl.

Please read Sal's perceptive comments about hi voltage exposure; and
observe his statement about choking the line.

Futher, and this complicates the simple rules above, your sleeve
dipole does not need to be made of equal length elements. This raises
the prospects of another topic:
Vertical, Off Center Fed Dipoles.

As for building ground radials - skip that wasted effort. You have
too little footprint available, and your ground isn't conductive
enough to present that much loss. This is why I suggested the sleeve
dipole.

73's
Richard Clark, KB7QHC