In message , Wayne
writes
Because aliens won't be able to find us.....

http://www.thesun.co.uk/sol/homepage...e-transmission
s-make-Earth-invisible-to-aliens.html

"Dr Drake said he believed that intelligent life DOES exist beyond
Earth.

"He reckoned alien civilisations were likely to be far more advanced
than ours and that their analogue TV age probably went long ago. That in
turn means that the world's search for their signals is that much
harder."

Maybe they can still do morse?
--
Ian

Dear Group: Frank Drake hired me for my first job in radio astronomy.
Years latter, I learned that he was most impressed that I had a first class
FCC commercial license (that type of license is long gone). Did some neat
propagation research in the hills of West Va. (where we did use antennas!)
Prof. Drake had an involved mathematical model that he used to suggest
existence of other people.

The December 1959 paper by Costas made clear the inherent advantages and
disadvantages of wide-bandwidth modulation systems. As others have
observed, narrow bandwidth emissions are most unlikely.

73, Mac N8TT

--
J. McLaughlin; Michigan, USA
Home:

"Ian Jackson" wrote in message
...
In message , Wayne
writes
Because aliens won't be able to find us.....

http://www.thesun.co.uk/sol/homepage...e-transmission
s-make-Earth-invisible-to-aliens.html

"Dr Drake said he believed that intelligent life DOES exist beyond Earth.

"He reckoned alien civilisations were likely to be far more advanced than
ours and that their analogue TV age probably went long ago. That in turn
means that the world's search for their signals is that much harder."

Maybe they can still do morse?
--
Ian

J. Mc Laughlin wrote:
Dear Group: Frank Drake hired me for my first job in radio astronomy.
Years latter, I learned that he was most impressed that I had a first class
FCC commercial license (that type of license is long gone). Did some neat
propagation research in the hills of West Va. (where we did use antennas!)
Prof. Drake had an involved mathematical model that he used to suggest
existence of other people.

The December 1959 paper by Costas made clear the inherent advantages and
disadvantages of wide-bandwidth modulation systems. As others have
observed, narrow bandwidth emissions are most unlikely.

73, Mac N8TT

And there's another factor, brilliantly illuminated in a short story in
Analog magazine years ago. A series of scenes took place, each involving
a different alien species in some distant solar system. In each scene a
discussion was taking place, involving budgetary restraints and the
prohibitive expense of transmitting powerful signals for other
civilizations to pick up. Each one, in turn, decided to reduce expenses
by listening only. . .

Roy Lewallen, W7EL