At 07:19 AM 9/9/99 -0700, Vic Rosenthal wrote:
>Jonathan Kaplan wrote:
>>
>> In other words, when I tune the AMP
>> the power meter (a RS model) will either show greater power at
>> a high SWR or low power at low SWR. But not high power at low
>> SWR! What does this mean is wrong? Does it neccessarily
>> mean the final output into the air is limited, and that the antenna
>> system is out of tune?
>
>If you mean that the meter shows extra high power on frequencies for which
the
>SWR is high, this is an inaccurate power reading caused by the meter's being
>designed to work properly only on a relatively flat (low-swr) line.
Not EXTRA high power. The maximum power showing in any case is about 1Kw,
which I am told is about expected for 100w drive from a Yeasu Ft-840.
>
>If you mean that the swr reading goes way up as the power output of the
amp is
>increased, then this might be an indication that the harmonic output of
the amp
>is very high when the amp is tuned for high power; the swr of the antenna
system
>at harmonic frequencies is probably very high.
>
If the amp has harmonics, being measured by the power meter and reject by
the antenna
system, I would think that means the antenna system is in good shape but
the amp
might need work, right?
Any suggestions about the enxt step?
Thanks for the quick reposnes.
Jonathan KO6XS
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