[AMRadio] Power Levels

[Ed - VA3ES]

I always believed that this list was for education, not flaming.

A 100% modulated AM carrier increases the instantaneous RF voltage by a
factor of 2. To derrive the equivalent power, you simply square that figure,
i.e.: 2² = 4. Thus the power increases 4 times.  So, the rule-of-thumb is
PEP= 4X the average unmodulated carrier power.

If you want to know what the PEP is of a highly modulated carrier (i.e. 125%
for example), multiply the avg power by the % increase in pos. peak
modulation (i.e.: 1.25) by 4. So, a 125% peak pos modulated 100W carrier has
an quiv PEP of 500W PEP.
(100x4x1.25 [or alternately, 125x4] = 500W)

You experts can feel free to correct any misstatements.

73,

Ed, VA3ES

> -----Original Message-----
> From: amradio-admin at mailman.qth.net
> [mailto:amradio-admin at mailman.qth.net]On Behalf Of Wt8r at aol.com
> Sent: Saturday, June 29, 2002 7:29 PM
> To: amradio at mailman.qth.net
> Subject: Re: [AMRadio] Power Levels
>
>
> In a message dated 6/29/02 7:20:44 PM Eastern Daylight Time,
> wwd at netheaven.com writes:
>
>
> >
> > > but
> > >where  did the "X4" come from to get the PEP figure?
> >
> > > WT8R
> >
> > Time was an 'extra-class' ticket holder would know where that x4 came
> > from, or know how to look it up.
> >
> > Elmer FUD
> >
> >
>
> Excuse me, but I think you for got to include yer callsign, if
> you have one?
> GB
>
> 73 de
> Dave in Dayton, WT8R
>
>
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