[Icom] Pwr output IC746

Fri, 15 Nov 2002 23:52:54 -0600

It is quite normal for the output meter to read considerably lower values
during voice transmissions than when keydown or whistling a constant loud
tone. The average male voice has a peak to average power ratio of about 14
dB which means that an indicated average output of 10-20 watts is about
right for 100 watts PEP.

Processed speech will have a high average value and the meter will read
higher, of course. But, if a loud whistle shows 100 watts, everything is OK.
A lot depends upon the characteristics of the meter. Some will follow voice
peaks much better than others.

73/72, George
Amateur Radio W5YR -  the Yellow Rose of Texas
In the 57th year and it just keeps getting better!
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
K2 #489      Icom IC-765 #2349     Icom IC-756 PRO  #2121

----- Original Message -----
From: "Gary Smith" <[email protected]>
To: <[email protected]>
Sent: Friday, November 15, 2002 4:07 PM
Subject: Re: [Icom] Pwr output IC746

> Lins,
>
> I have the 746 Pro model and the only time I have
> noticed the SSB power drop off is when the SWR at the
> operating frequency it too high.  Have you checked
> this out?
>
> 73 de Gary
> WA1TJB
> --- Lins  Berben <[email protected]> wrote:
> >
> > ----- Original Message -----
> > From: Lins Berben
> > To: [email protected]
> > Sent: Tuesday, November 12, 2002 9:36 PM
> > Subject: Pwr output IC746
> >
> >
> >
> > Since a few months i have a IC746. But i have a
> > problem in SSB operation.
> > If i talk with normal voice level the the pwr output
> > is to less. Example at maximum pwr (100W), in CW pwr
> > peaks 100W in SSB at normal voice level pwr output
> > peaks only 20-25W, in SSB when i whistle pwr peaks
> > 100W. ( I have other tranceivers and by them the pwr
> > in SSB peaks 80W or more)
> > I did everything what is in the instruction manual.
> > I chanced microfones , handheld and desktop. But
> > still it is the same.
> > What could be the problem?
> >
> > 73's Lins Berben PA3CMC