Thread: Power Factor
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Old May 26th 04, 06:32 PM
N2EY
 
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"David J Windisch" wrote in message ...
Hi, all concerned:

*If the analogy holds*:

R-f transmission-line swr reduction by what ever means is, I think, akin to
what the local power company accomplishes by hanging lumps of reactance
across its a-c transmission lines, ie, reducing volt-amps-reactive, in its
system.


So far so good.

Picture an alternator delivering rated current into a reactance:
I-squared-R is, I think, dissipated in the resistance of the alternator
windings.


That's why transformers are rated in VA not W.

No wonder an anode glows *in some cases* due to "mismatch".


Nope. That's not why. Reactive power is not the cause of plate dissipation.

*If the analogy holds*.


It doesn't.

So, one fine day, I'll test this hypothesis: I'll fire up a 4-400 (no
ceramic jugs allowed!), on some h-f band, driving it to (metered) d-c input
levels just below its rated dissipation, into a mismatch built like a
battleship in its plate circuit.


How?


(How) Is it possible with metrology (that I can afford, much less obtain use
thereof), for me to know without a reasonable doubt what the proportions of
plate-glow due to little-r-sub-little-p and "reflected power from the
mismatch" are?


No, because plates don't glow because of reactive power.

Are there other sources of plate glow?

Yes. Reactive power isn't one of them. Sorry.


73 de Jim, N2EY