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G8MNY > TECH 12.08.20 09:35l 72 Lines 2862 Bytes #999 (0) @ WW
BID : 1120_GB7CIP
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Subj: Unit Madness
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Sent: 200812/0731Z @:GB7CIP.#32.GBR.EURO #:1120 [Caterham Surrey GBR] $:1120_GB
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
By G8MNY (Updated Aug 12)
After helping with a local ham radio course, I realise how confusing some of
the units, symbols, & names are to new comers.
Here is a short look at the problem if the names/units/symbols get misused or
are unclear. They can normally be distinguished by the context & a thorough
knowledge of the subject concerned.
UNIT/
SYMBOL POSSIBLE MEANINGS
A Amperes, Area (a), Acceleration, ngstrom, Atto 10^-18, Attenuation,
Altitude, Argon.
B Magnetic Induction, Bars, Boron.
C Coulomb, Capacitance, øCentigrade/Celsius, Calories, Speed of Light,
Cycles, Carbon.
D Distance, Density, Dynes, Direction, Drag.
E Energy, Electric Fields, EMF, PD, Voltage, (e)rgs, Exa 10^18.
F Farad, Frequency Occurance, Force, Feet (Ft), Femto 10^-15, Fluorine.
G Force of Gravity, Giga 10^9, Conductance, (g)rams, Gauss, Gain.
H Henrys, Magnetic Field, Height, Hertz (Hz), Hydrogen.
I Current, Inductance, Inertia, Iodine, Imaginary in Maths.
J Jules, (j) imaginary in Electrical.
K øKelvin, (k)ilo 10^3, Potassium, Any Constant.
L Lumens (Lm), (l)itre, Lux (Lx) Inductance, Loss, Length, Lift.
M Mass, Moments, (m)etre, Mega 10^6, (m)illi 10^-3. Mile (Mi), Mo(1/ê).
N Newton, Nano 10^-9, Nitrogen.
O Örsteds, Oxygen.
P Power, Pressure, Pascal (Pa), (p)ico 10^-12, Peta 10^15, Phosphorus.
Q Charge, Resonant gain.
R Resistance, Radius, Reluctance.
S Siemens, (s)econds, Suseptance, Speed, Distance, Sulphur.
T Tesla, Tonne, Ton, Torque, Temperature, Network Type.
U Uranium, (U Signal Phase Axis). (U can be voltage says DK3UZ)
V Voltage, velocity, Volume, Vanadium, (signal Phase Axis).
W Watts, Work, Weight (Force), Tungsten.
X Reactance, Left Right Axis, Unknown.
Y Up Down Axis, Yttrium, (Luminance Signal), Unknown.
Z AC Impedance, Far Near Axis, Network Type, Unknown.
æ Permeability, micro.
ê Ohms.
ã Pi, Network Type.
ë Delta, a Little bit.
,\ Lamda, wavelength.
(ohms etc. View in code page 437 Terminal Font)
And some more from LW1DSE
à (Alpha) for some angles.
ß (Beta) for DC current gain in BJT's.
ã as a chain of multiplies.
ä (Sigma) for reiterative summation.
æ (mu) for the gain in triodes (tubes or valves), magnetic permeability.
w (as omega) = 2 * ã * f.
â (rho) as specific gravity, reflection coeficient.
B as Back Electromotive Force.
å (eta?) as turns ratio in transformers.
ë (as Delta) for density.
G for Gm, transconductance in valves.
R, S, T, U, V, W for 3 phase electric systems.
X for an indepent variable in math.
Y for dependent var in math.
Why Don't U send an interesting bul?
73 De John G8MNY
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