[GreenKeys] Loop Supply

[Jim Haynes]

See also

QST Issue: Jan 1984
Title: Universal RTTY Current-Loop Interface, A

QST Issue: Jan 1972
Title: Modern Teleprinter Local Loop, The

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 	"Ya can argue all ya wanna, but it's dif'rent than it was."
 	"No it ain't! No it ain't!  But ya gotta know the territory."
 		Meredith Willson, The Music Man