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Revisiting the Power Explanation
On Mar 21, 4:30 pm, Dan Bloomquist wrote:
Keith Dysart wrote: On Mar 21, 3:06 pm, (Richard Harrison) wrote: Bird says of its Model 43 Wattmeter: "Experience using the "Thruline" Wattmeter for transmitter tune-up, antenna matching, etc. (i.e. on operating problems), shows that the power ratio is as useful in practice as the VSWR." One can see reflected power disappear at the transmitter terminals as a match is made to the transmitter load. That eliminates stress on the transmitter from reverse power. I suggest that a more accurate description would read: "One can see the indication on the meter go to zero at the transmitter terminals as the match is made to the transmitter load". Then, you have never matched with a reflection. Without the experience, how can you make a claim? You have not made the observation yet you claim what it 'should' be. I may have misunderstood, but I thought that when Richard said "see reflected power disappear" he was observing the Bird Wattmeter mentioned in his previous paragraph and watching its indication go to zero. If this is not what was meant, then I need elaboration. Otherwise, I think I said the same as Richard in different (and, arguably more precise) words. ....Keith |
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