On Tue, Aug 30, 2016 at 11:26 PM, Roger (K8RI) <k8ri@rogerhalstead.com> wrote:
> Did you read the power required even if it were a coherent signal beamed at
> earth from 60 light years?
> I doubt the entire electrical grid could provide the power. How about an
> antenna that could handle that much power?
Read chapter 2
http://seti.harvard.edu/grad/dpdf/thesislt.pdf
"This means that with a system as described above, we can send
interstellar telegrams a distance of 4000 light years for an energy
cost of about $1/word."
The power required to send a coherent signal in a narrow beam across
interstellar distances is actually quite modest.
Also, see
http://www.wired.com/2016/08/astronomers-dont-think-called-seti-signal-aliens-neither/
--
Charles M. Coldwell, W1CMC
Belmont, Massachusetts, New England
"Turn on, log in, tune out"
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