Talk:Phantom circuit

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The phantom circuit is a derivative of the bridge circuit, and should be cross referenced to it. It requires balanced circuits.

The phantom loop article is about non-obvious current return paths in unbalanced circuits and is quite a different idea.

Also, loading coils are something else. Unsigned comment by User:AJim (User talk:AJim) 03:07, 5 September 2007

Loading coils are indeed something else, but there is such a thing as an unloaded phantom which I have now added to the article. SpinningSpark 21:07, 30 September 2008 (UTC)[reply]

Phantom loops[edit]

Should be included in some way. from redirect page.

A phantom loop occurs in suitably arranged electrical networks that includes within the number of conductive paths part of the natural environment (which can be at the same time acting as a conductor of another circuit) to complete a circuit of theoretical open systems. Phantom loops can occur in suspended circuits, in which the conductor has no ground and uses the ionosphere to complete the circuit at both ends. Phantom loops can also occur in grounded circuits, in which the conductor has a ground and uses the lower atmosphere to complete the circuit at both ends (with the waves traversing the magnetic poles of the Earth).¹

notes: 1. ^ The "electrodynamic tether" uses plasma contactors and the ionosphere, plus the electromagnetic induction from Earth's magnetic field, as parts of a dynamo (or an electric motor), to turn the kinetic energy of the spacecraft into electrical energy (or conversely). The Tesla coil, which can form a natural circuit. The long-distance electromagnetic telegraph, which in some cases used the ground as the return path for the circuit. Single wire earth return power distribution systems for supplying power at low cost to remote areas

J. D. Redding 15:22, 31 October 2010 (UTC)[reply]

Only if we can find some reference that backs up this unique and original definition. Every hit on Google Books that's not an echo of Wikipedia says a phantom loop is a third telephone circuit carried over pairs of copper wires. --Wtshymanski (talk) 15:32, 31 October 2010 (UTC)[reply]

it's not original nor unique. But lets find the references. J. D. Redding [PS., the telegraph circuits is analogous to the telephone circuits, so probably don't have to look to hard for those refs]

* space launch and flight - Page 35

* The Electrical world and engineer, Volume 40

* Telephony, Volume 7 By Harry B. McMeal pg 245+

* Cyclopedia of telephony and telegraphy: a general reference work, Volume 2 By American Technical Society Pg. 321+

Need more? J. D. Redding 19:35, 31 October 2010 (UTC)[reply]

As a side note, it would seem interesting to me if I could find a print of 'The propagation of electric currents in telephone and telegraph conductors' by J. A. Flemming .... seem to be relevant. J. D. Redding 19:48, 31 October 2010 (UTC)[reply]

Ha! found a copy, sorry ... The Propagation Of Electric Currents In Telephone And Telegraph Conductors (1912) J. D. Redding 19:54, 31 October 2010 (UTC) [PS., Pay attention to the text in there and the references of the work of Pupin; additionally you may have to understand the ground return of Pupin's work.][reply]