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Extra info for 315-1975 R1993) IEEE Graphic Symbols for Electrical and Electronic Diagrams Including Reference Designation Letters) Bound with its Supplement 315-1986 R1993

Example text

The stem of the symbol may represent any type of balanced or unbalanced feeder, including a single conductor. 28 Copyright © 1975 IEEE All Rights Reserved --``,-`-`,,`,,`,`,,`--- Copyright The Institute of Electrical and Electronics Engineers, Inc. 5 Qualifying symbols to indicate polarization Use only if essential to indicate special property of an antenna. 1 Plane polarization 29 Copyright © 1975 IEEE All Rights Reserved Copyright The Institute of Electrical and Electronics Engineers, Inc. 6 Qualifying symbols to indicate direction of radiation Use only if essential to indicate special property of an antenna.

A gas-filled device may be indicated by a dot within the envelope symbol. , cathode-ray tube, iconoscope, image orthicon, vidicon, X-ray tube, etc. 2. 1 General 17 Copyright © 1975 IEEE All Rights Reserved Copyright The Institute of Electrical and Electronics Engineers, Inc. 2 Split envelope If necessary, envelope may be split. 3 Application: gas-filled envelope The gas-recognition symbol (dot) may be located as convenient. 4 Application: liquid-filled envelope The liquid-recognition symbol may be located as convenient.

Style 2 symbols are drawn with one straight and one curved line. 1, this indicates that either style may be used, as modified for that particular application. 2C — The distance between the plates shall be between one-fifth and one-third of the length of a plate. 1A — For style 1, if it is necessary to identify the capacitor electrodes, the modified element shall represent the outside or lower potential electrode. 1B — For style 2, if it is necessary to identify the capacitor electrodes, the curved element shall represent: a) The outside electrode in fixed paper-dielectric and ceramic-dielectric capacitors; b) The moving element in adjustable and variable capacitors; c) The low-potential element in feed-through capacitors.

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