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Title: Ferranti intervalve audio frequency transformer type AF3, wi [Go to resource]
Description: Ferranti intervalve audio frequency transformer type AF3, with carton License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1969-23 Go to resource More Like this...-
Formo audio-frequency inter-valve transformer…Formo audio-frequency inter-valve transformer coupling…
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