#209: Basics of Phase Dots on Transformer Windings @w2aew

w2aew | #209: Basics of Phase Dots on Transformer Windings @w2aew | Uploaded August 2015 | Updated October 2024, 2 hours ago.
This video describes what the "phase dots" are that you often see adjacent to windings of a transformer. It discusses how these dots are used in certain circuits to establish a desired phase relationship between the signals on the various windings. A couple of tips are given regarding how to determine the phasing relationship on homebrew transformers. Finally, measurements are made with an oscilloscope on a trifilar wound transformer to see the phase relationship between the signals on each of the windings with respect to the phasing dots. Notes can be found here:
qsl.net/w/w2aew//youtube/PhaseDots.pdf

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