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Old December 1st 04, 06:11 PM
Cecil Moore
 
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Richard Clark wrote:
Cecil Moore wrote:
As you know, furnishing line losses in dB implies a power ratio.


dB is dimensionless. Such generalizations forced into logic become
naive paradoxes:


Uhhhhhhh Richard, a power ratio *IS* dimensionless. Any ratio of like
quantities is dimensionless. dB is proportional to the log of the ratio
of two quantities. That ratio, e.g. of two powers, is dimensionless.

Note from the matched line example above where 5 watts of line losses are
0.21 dB to the mismatched line example where 5 watts of line losses are
1.25 dB (for the same forward power of 100w), the same magnitude of loss
appears much higher as a dB value referenced to NET source power.


with boundary conditions being violated with the substitution of
Mismatch Loss for Dissipative Loss - and done poorly too.


I certainly didn't intend to do that. The dissipative loss in each
of the examples was 5 watts. The NET source power was 100 watts in
the matched case and 15 watts in the mismatched case.

When I had you thank Bart for his teachings, you should have examined
the consequences of his lesson not simply his correction of your
error.


I'm asking an honest question, Richard. Why can't you provide an
honest answer?
--
73, Cecil http://www.qsl.net/w5dxp