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Used widely in power transformers, current transducers, instrument transformers, inductors, chokes, ballasts, voltage stabilizers and regulators, welding transformers, broad band transformers, filters, etc.
Marc
Reviewed in Canada on June 4, 2021
because no spec/details (other than dimensions), i have tested it with my VNA.. you can to compare with the green one from this seller.. frequency range of the green type mean that is for switching supply or emi filter (not for HF bandpass/lowpass/highpass filters) but only -0.5db loss (-1db with 4 turns each side) is very nice if used for low frequencies.. the yellow/white have a very nice shape for HF use but -7db loss is not a good performance (-12db with 4 turns of wire each sides).. iām disappointed of the missing informations from the seller, after a web search, nothing found about this color code.. maybe will find something later..hope that the curves showed (and the setup) will help someone..
Mr. Chad Schwartz
Reviewed in the United States on May 7, 2021
Love these. Definitely that iron powder core high lsat feel to them. I did up a 33uh with twisted dual 22g and it handled 5a nicely in a buck converter configuration. Thanks a bunch!
David E.
Reviewed in the United States on March 30, 2019
They worked in the Joule thief circuit. That's what I bought them for.
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