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Phone ModificationThis is the "infamous" phone modification from page 58-59 of "Light on the Horizon", except this is the way is it is *supposed* to look. This is a schematic to place a user-adjustable volume control onto the receiver of a phone, thereby allowing those with auditory hypersensitivities to be more comfortable. Note this was done in the early 1990's and phones are much different these days. This schematic may be old and outdated, and of no interest other than historical.
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