>
>
>> >To further confuse the issue, I see an honest indicated 300w when I tune
>> >the final on my 'tenna tuner power out meter. I know some of these are
>> >damped, and that they lag on voice peaks. So, what real power out am I
>> >likely getting when I'm seeing 300w peaks?
>>
>> You need a calibrated scope and hv multiplier probe to measure voice peaks
>> into a 50-ohm load.
>>
>
>.....or a good peak reading wattmeter. The rise and fall times of
>voice waveforms are so slow, it is quite easy to build a very
>accurate peak meter.
>
>A good meter is actually more reliable than a scope.
>
? I actually used to work in a calibration lab (U.S.N., Pacific Missile
Range). To calibrate RF wattmeters, we used a 50-ohm termination, an RF
source, and an oscilloscope that was actually calibrated by our
NBS-traceable voltage-standard. .
>
- Cheers, Tom
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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