Hmmmm,
I think there is little loss that can be measured in the insertion of the
tuner...I think what is happening is the watt meter in the rig is sensitive
to RF voltage and that taking the tuner out of the
circuit is allowing a higher RF voltage to be present at the sense point
for the internal meter which
is given a false indication of power output...just like the watt meters in
the Ameritron amplifiers that show more power output when the SWR is
higher...Try the test into a dumy load using a bird watt
meter and I'll bet you can't notice the difference in power output!
HAVE FUN,
dave
WA3GIN
=====================
David G. Maley wrote:
> Ted;
> Any antenna tuner will impose some loss. The better the design,
> the lower the loss. My FT-900 normally drops about 10W across
> it. This is even for a 50 ohm load. (100w in gets 90W out).
> I would expect the same type of performance from a FT-1000.
> Please check loss by running the transmitter into a good load
> first.
> Dave
> WA0ZZG
>
> On Fri, 16 Jul 1999, Ted Sarah wrote:
>
> >
> > Has anyone else noted the difference in power output with the antenna
> > tuner on and off? I noted that I was only putting out 50w, external
> > meter. I started testing various things and when I turned off the
> > antenna tuner the power went up to 75 watts. Any comments?
> >
> > 73 - Ted - W8TTS
> >
> >
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>
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