| Date |
Fact of the Day Topic |
| November 1 |
Electrical Safety Grounds Electrical wiring
to the power outlets in most modern homes and offices includes a safety
ground (also called ... |
| November 2 |
Guy Insulator Flashover Insulators generally
should be used to break up tower guy cables into short, non-resonant
lengths to ... |
| November 3 |
Ring Antenna Systems Most vertically-polarized
antennas with circular horizontal radiation patterns ... |
| November 4 |
Japanese Semiconductor Numbers Japanese
semiconductor part numbering tends to confuse Americans, both because
... |
| November 5 |
Resistance Pads Resistance pads are used
primarily as audio-frequency attenuators, although they can ... |
| November 6 |
1400 kHz Gyro Frequency Earth's magnetic
field passes through the ionosphere and exerts a force on ionospheric
electrons that ... |
| November 7 |
RF Power Transistor Mounting Contrary to
popular belief, the area around and under ... |
| November 8 |
Vacuum-Tube Input Admittance The input
load of a common-cathode vacuum-tube amplifier can be specified as ... |
| November 9 |
U.S. Residential Phone Wiring Some telephones,
answering machines, modems, and other equipment will not function correctly
if ... |
| November 10 |
VU Meters VU Meters were developed at
Bell Laboratories to provide a standard way to measure ... |
| November 11 |
Diversity Reception High-frequency signals
from a distant transmitter fade at different times when ... |
| November 12 |
Earth Conductivity & Dielectric Constant The
dielectric constant and conductivity of earth vary greatly at ... |
| November 13 |
Reducing DSL Interference High-power transmitters
often interfere with DSL (Digital Subscriber Line) Internet circuits
... |
| November 14 |
Rayleigh-Carson Theorem In 1929 John R.
Carson published an extension of a theorem previously published by Rayleigh
which is essentially ... |
| November 15 |
Elliptical Polarization Elliptically polarized
electromagnetic waves are produced wherever two ... |
| November 16 |
American Wire Guage The American Wire
Gauge (AWG) is used in North America to specify ... |
| November 17 |
RF Ground Conductors Low impedance connections
between radio equipment and a good ground system are important to ... |
| November 18 |
Remote Inductive Tuning Remote adjustment
of antenna tuning and phasing networks often is accomplished by ... |
| November 19 |
Poynting Vector Method There are two fundamental
methods of calculating the total amount of energy radiated ... |
| November 20 |
Dielectric Constant Insulating medium
separating the plates of a capacitor is called dielectric. A capacitor
with vacuum dielectric has ... |
| November 21 |
PEX Insulation Material PEX water pipe
is made from cross-linked high-density polyethylene that has ... |
| November 22 |
Electromagnetic Horns Electromagnetic
horns have two primary communications applications. One is to ... |
| November 23 |
Insulator Power Loss The insulating qualities
of insulating materials are not perfect. Some ... |
| November 24 |
Transmission Line Radiation All RF transmission
lines other than waveguides and totally-shielded coax ... |
| November 25 |
Precipitation Static Precipitation static
is a continuous interference that tends to suddenly mask reception for
... |
| November 26 |
Electromagnetic E/H Ratio Radio frequency
energy in the space near a primarily magnetic field radiator, such as
... |
| November 27 |
Coax Ice and Sun Shield It is not uncommon
for large chunks of ice to fall from towers installed in ... |
| November 28 |
Coax Power Derating Heat from direct summertime
solar radiation on a coax cable can substantially lower ... |
| November 29 |
Transmission Line Phase Shifters Transmission
line propagation delay often is used to phase radiation from ... |
| November 30 |
Tree Signal Attenuation If a vertical
28 MHz antenna is surrounded by moderately thick trees that are higher
than the top of the antenna ... |
