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Extra info for 315-1975 (R1993) IEEE Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters) Bound with 315A-1986 (R1993) Supplement to IEEE Std 315-1986

Example text

6 Continuously adjustable or variable differential capacitor The capacitance of one part increases as the capacitance of the other part decreases. 8 Split-stator capacitor The capacitances of both parts increase or decrease simultaneously. 9 Feed-through capacitor Commonly used for bypassing high-frequency currents to chassis. 9A: For purposes of clarity, terminals may be shown on the feed-through element. 10 Capacitive termination Commonly used on coaxial and wave-guide diagrams. 12A: The asterisk is not part of the symbol.

Qualifying symbols may be added to the antenna symbol to indicate polarization, direction of radiation, or special application. If required, the general shape of the main lobes of the antenna polar diagrams may be shown adjacent to the symbol. Notes may be added to show the direction and rate of lobe movement. The stem of the symbol may represent any type of balanced or unbalanced feeder, including a single conductor. 5 Qualifying symbols to indicate polarization Use only if essential to indicate special property of an antenna.

The stem of the symbol may represent any type of balanced or unbalanced feeder, including a single conductor. 5 Qualifying symbols to indicate polarization Use only if essential to indicate special property of an antenna. 6 Qualifying symbols to indicate direction of radiation Use only if essential to indicate special property of an antenna. 1) may be used to supplement a qualifying symbol. 6B — Antenna rotation can be accomplished by electromechanical or electronic means. 5 Battery The long line is always positive, but polarity may be indicated in addition.

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315-1975 (R1993) IEEE Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters) Bound with 315A-1986 (R1993) Supplement to IEEE Std 315-1986


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