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December 13th 04, 11:49 PM

On Mon, 13 Dec 2004 15:33:51 -0600, (Richard
Harrison) wrote:

Yes, but the equipment often takes different forms. The best place to
get rid of circulating current in the transmission line is at the load,
before it causes additional line loss.

Hi Richard,

One of my old references offers support to this in the terms you
expressed following this quote above:
"Power factor correction may be made on transmission
lines, whereby the voltage regulation may be materially improved,
the generating capacity increased and the copper losses
reduced. This correction may be made by the over and under
excitation of synchronous apparatus at the receiving end of
the line. When used for this purpose exclusively, such
apparatus is called a synchronous condenser. ...its sole
function being to regulate the power-factor...."

The difference between this matching to the load, and say Gamma
matching to an antenna is in name only - same problem for both
disciplines, same approach to a solution. It stands to reason that
when this technique is performed at the source end, that it is still
the same "synchronous condenser" metaphor; hence we have
electro-mechanical artifices to construct a phase offset to a reactive
load.

If everyone could afford gold-plated rigs, then they might consider
paying for the same artifice of the "synchronous condenser" metaphor
in place of their tuners. In this regard they would be using Gyrators
(artificial reactors). Through the use of feedback in an operational
amplifier dedicated solely to this purpose, you can invert the use of
a capacitor to appear to be an inductor (or t'other way 'round). Here,
this particular circuit probably outnumbers all examples of tuners AND
power line correction (it is exceedingly commonplace in switchers).

73's
Richard Clark, KB7QHC