ABBREVIATIONS OF COMMON TERMS
A. ..............Aerial
A.C. ............Alternating Current
A.F. ............Audio Frequency
B. and S. .......Brown & Sharpe Wire Gauge
C. ..............Capacity or Capacitance
C.G.S. ..........Centimeter-Grain-Second
Cond. ...........Condenser
Coup. ...........Coupler
C.W. ............Continuous Waves
D.C. ............Direct Current
D.P.D.T. ........Double Point Double Throw
D.P.S.T. ........Double Point Single Throw
D.X. ............Distance
E. ..............Short for Electromotive Force (Volt)
E.M.F. ..........Electromotive Force
F. ..............Filament or Frequency
G. ..............Grid
Gnd. ............Ground
I. ..............Current Strength (Ampere)
I.C.W. ..........Interrupted Continuous Waves
KW. .............Kilowatt
L. ..............Inductance
L.C. ............Loose Coupler
Litz. ...........Litzendraht
Mfd. ............Microfarad
Neg. ............Negative
O.T. ............Oscillation Transformer
P. ..............Plate
Prim. ...........Primary
Pos. ............Positive
R. ..............Resistance
R.F. ............Radio Frequency
Sec. ............Secondary
S.P.D.T. ........Single Point Double Throw
S.P.S.T. ........Single Point Single Throw
S.R. ............Self Rectifying
T. ..............Telephone or Period (time) of Complete
Oscillation
Tick. ...........Tickler
V. ..............Potential Difference
Var. ............Variometer
Var. Cond. ......Variable Condenser
V.T. ............Vacuum Tube
W.L. ............Wave Length
X. ..............Reactance
[GLOSSARY]
A BATTERY.--See Battery A.
ABBREVIATIONS, CODE.--Abbreviations of questions and answers used in wireless communication. The abbreviation of a question is usually in three letters of which the first is Q. Thus Q R B is the code abbreviation of "what is your distance?" and the answer "My distance is..." See Page 306 [Appendix: List of Abbreviations].
ABBREVIATIONS, UNITS.--Abbreviations of various units used in wireless electricity. These abbreviations are usually lower case letters of the Roman alphabet, but occasionally Greek letters are used and other signs. Thus amperes is abbreviated amp., micro, which means one millionth, [Greek: mu], etc. See Page 301 [Appendix: Useful Abbreviations].
ABBREVIATIONS OF WORDS AND TERMS.--Letters used instead of words and terms for shortening them up where there is a constant repetition of them, as A.C. for alternating current; C.W. for continuous waves; V.T. for vacuum tube, etc. See Page 312 [Appendix: Abbreviations of Common Terms].
AERIAL.--Also called antenna. An aerial wire. One or more wires suspended in the air and insulated from its supports. It is the aerial that sends out the waves and receives them.
AERIAL, AMATEUR.--An aerial suitable for sending out 200 meter wave lengths. Such an aerial wire system must not exceed 120 feet in length from the ground up to the aerial switch and from this through the leading-in wire to the end of the aerial.
AERIAL AMMETER.--See Ammeter, Hot Wire.