On Mon, 17 Apr 2006 21:07:41 -0000, "Dave" wrote:

how would the described element loading compare

Hi Dave,

Without some expression of what you might find acceptable, or
unacceptable, comparisons are condemned to vagueness, or extreme
elaboration.

with, lets say, a 40-2cd element?

Approx. the same;

bandwidth?

Approx. the same;

coupling between yagi elements??

Greater, forcing a different geometry.

losses?

Approx. the same.

There is nothing in your question that breaks new ground, and
substituting equivalent components really only shuffles a few design
parameters. Such shuffling may entail considerable tedium in
implementation details, but you say nothing of what passes for good or
bad. We could equally rend the correspondence bandwidth here into the
equivalent tedium of quoting the partial dB differences - that has
been good for more than a thousand posts so far.

One of our infrequent correspondents here would substitute metal
tubing for bamboo wrapped with metalized mylar film. He couldn't
expect any gain in this swap, nor could we point out any considerable
loss; but let's face it, the market is not rushing to build antennas
this way because there is no economic nor technical justification.

Thus, the only advantage is one of marketing. If you cannot quote a
gain advantage, you can at least argue conservation because you are
doing Green DXing with Bamboo elements and recycled weather balloons.

So it comes down to a familiar question: What's your point?

73's
Richard Clark, KB7QHC