Don't think a calculator is needed. 30dB is a ratio of 1000 so that would be
1.5 watts.
Jim, AF6O
--------------------------------------------------
From: "James Colville" <jimw7ry@gmail.com>
Sent: Saturday, April 03, 2010 9:48 AM
To: "David Cutter" <d.cutter@ntlworld.com>
Cc: <amps@contesting.com>
Subject: Re: [Amps] coaxial stub on amplifier output
> Get your calculator out. 30dB down from 1500 watts is how much power?
>
>
> 1500 watts=+61.8 dBm minus 30 db (which is what the harmonic would be down
> normally) = +30dBm. +30dBm = 1 watt. Evenif the harmonic is only down 25
> db, that is only 3 watts.
>
>
> Not much power do dissipate is it?
>
> 73
> Jim W7RY
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