On 9/8/2010 8:06 PM, Sal M. Onella wrote:
On Sep 7, 12:22 pm, Roy wrote:

That looked so bad I had to run an analysis to see for myself. Sure
enough, it's that bad. And even with a 0.25 inch diameter column at 146
MHz, the efficiency is only on the order of 1%. A foot and a half of
wire vs. a pump, power source, and ferrite transformer? No contest.

Roy Lewallen, W7EL

I know Dan Tam, the SPAWAR engineer in the video. He's a pretty sharp
guy. I hesitate to throw him into the Lions' Den but I will if you
let me watch. :-)

"Sal"

It's a sad comment on the state of this newsgroup that an objective
statement of what are believed to be facts is taken as "throwing [the
engineer] into the lions' den". It's not my intent at all to impugn the
engineer. Surely he's aware of the efficiency of the "antennas" he's
creating, so either my (and Frank's) calculations are grossly incorrect
or SPAWAR thinks there's a market for such inefficient antennas. It
would be educational to know which of these is the case. It was
interesting that there was no mention in the video of very low
efficiency, but I guess that's to be expected for a promotional piece
produced by a marketing department looking for investors.

Roy Lewallen, W7EL