I have a 6BTV that I'm about to install. It will primarily be used for
80/40/30 meters. Some questions:

I could elevate it, if it would improve performance. The manual says not to
ground the radials or the antenna base, so I could mount the unit on an
insulated mast, and string the radials at a 45 degree angle....

Or I could place it near the ground, or try a metal mast, or....

Any experience/suggestions?

Gary K5QT