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Valve Radio and Audio Repair Handbook by CHAS MILLER

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Common abbreviations

Notes: this list is not exhaustive but it does cover most of the terms used in the vintage radio era and which will be found in literature and receiver circuit diagrams of the period. In some cases alternatives have been given for abbreviations but others might well be found to have been used. In particular there seems to have been a fairly free interchange of upper and lower case, or of normal or italic letters in different publications (sometimes even in the same!) but as with certain other ambiguities the context will usually show which particular interpretation should be used. Valve makers’ data books used a large number of abbreviations, of which are shown here only the few that are also used generally in vintage radio. ...

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