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Title: Tapped radio - frequency transformer with adjustable couplin [Go to resource]
Description: Tapped radio - frequency transformer with adjustable coupling (loose coupler), c. 1923 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1977-893 Go to resource More Like this...-
Formo audio-frequency inter-valve transformer…Formo audio-frequency inter-valve transformer coupling…
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