[AMRadio] Ranger Audio... the numbers


crawfish crawfish at surfmore.net
Fri Nov 17 19:54:04 EST 2006


Impedance at the plates is more than 50 ohms.
                                                        Joe W4AAB
----- Original Message -----
From: "Jack Schmidling" <jack at schmidling.com>
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Friday, November 17, 2006 5:49 PM
Subject: Re: [AMRadio] Ranger Audio... the numbers


> Larry Taft wrote:
>
> > Just from "rule of thumb" for audio tube amps you should get a couple
> > hundred volts audio swing (not related to BIRD WATTS) at each plate to
> > ground.  50 v is only a couple of watts audio.
>
> Could you explain the math on that?  How do you arrive at watts knowing
> only volts?
>
> As a data point, 50v into a 50 ohm load is 50Watts
>
>
> js
>
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