In a message dated 12/26/06 6:27:25 PM Eastern Standard Time,
[EMAIL PROTECTED] writes:
> Transmit power 500 watts S-9 +10 db
> 50 watts S-9 (+ 10 db over 9)
> 12.5watts S-8
> 3.1 watts S-7
>
> You lose 1 S-Unit each time you're reducing power by 1/4.
Yup - *if* the receiver is really 6 dB per S unit.
Now look at these numbers:
Transmit power 1280 watts S-6
320 watts S-5
80 watts S-4
20 watts S-3
5 watts S-2
If the receiving station can't dig out your S-2 signal, no QSO.
>
> One S-unit consists of 6db increase or decrease in received signal
> strength. Transmit power must be increased FOUR TIMES to achieve a
> signal strength increase of one S-Unit!
>
> A QRP signal is mighty respectable at S-7 on anyone's receiver.
>
*if* the path is such that you are S-7.
73 de Jim, N2EY
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
