If it's a single element, how in the world will you ever measure it
accurately enough to KNOW what the up-or-down tilt is? That is, the
directionality of a simple half-wave dipole just isn't enough to matter
when you get down to a couple of degrees. In freespace you MIGHT be
able to measure things that closely if you were extremely careful, but
over practical ground, I don't believe you have any hope.

If it's multiple vertically-stacked elements, then arrange the feed so
their currents are shifted in phase a small amount from element to
element. A back-of-the-envelope picture and some simple trig should
tell you just how much phase shift you should have between adjacent
elements.

Cheers,
Tom

I'd also think that physically tilting the antenna that much might not
be too much of a trick, and it should give you the tilt you need. As Tom
says, it must have a tremendously narrow elevation pattern if you're
going to see any significant change with that small amount of tilt.

Roy Lewallen, W7EL

K7ITM wrote:
If it's a single element, how in the world will you ever measure it
accurately enough to KNOW what the up-or-down tilt is? That is, the
directionality of a simple half-wave dipole just isn't enough to matter
when you get down to a couple of degrees. In freespace you MIGHT be
able to measure things that closely if you were extremely careful, but
over practical ground, I don't believe you have any hope.

If it's multiple vertically-stacked elements, then arrange the feed so
their currents are shifted in phase a small amount from element to
element. A back-of-the-envelope picture and some simple trig should
tell you just how much phase shift you should have between adjacent
elements.

Cheers,
Tom