In a message dated 12/23/2005 9:24:05 A.M. Central Standard Time,
Gary.Stone@med.va.gov writes:
Hi to all,
First, I hope you all have a wonderful Holiday and Merry Christmas. Thanks
for the help on this reflector this past year.
I am now trying to sort out in my head a simple way to get a rough idea
about some gain calculations on a Yagi antenna.
For example, if a Yagi has a gain of x db or x dbi (whichever) and is
running a certain power then at what power level would you need with a
vertical or dipole to roughly equal the Yagi? Is there a simple way to get
a ROUGH idea and not a scientific solution?
Thanks, Gary, N5PHT
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
Roughly speaking: a 1 dB change happens with a 25.9% power change (ie: 100w
to 125.9w)and a 3 dB change happens with a two times power change (ie: 100w to
200w)
If the change is 6 dB then there is two plus two times power (ie: 100w to
400w).
Hope this is what you were looking for.
73,
Gerald K5GW
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|