Mark Atanovich wrote:
Big Yagi:

http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=41 298

Is this BS or is this kind of gain at least theoretically possible?

Probably more BS than truth!

dB is a ratio. To simply quote 35 dB gain is 100% useless. It has to be
gain compared to what?

The images at the web site show a 13 element Yagi. Thirteen elements
typically produce about 15.8 dBi or about 13.7 dBd.

The higher gains quoted, 35 dB, can be achieved in BIG DISH antennas
[100 foot diameter at 2 GHZ or 300 foot diameter at 800 MHz].

I suspect there is more marketing than science in the 36 dB gain figure.
It may be, I say again may be, based on signal inside a house compared
with a signal from an outside antenna at altitude. But 36 dB is an
increase of 4000 times. That sounds like a stretch.