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Links to various amateur radio related items

Glossary of Terms

 Icom Ham Radio Terms

Alternating Current - electrical current that periodically changes direction.  This is usually in the form of a sine wave.
Amateur Operator - someone using amateur radio equipment to communicate with other amateur radio operators.  This requires an amateur license.
Amateur Service -
Amateur Station - a radio station used to provide radio communications by an amateur radio operator.
Ammeter - electrical measuring circuit or meter to indicate the amount of current flowing in a circuit.
Ampere (A) - Unit of measure of current flowing in a circuit. 
Amplitude Modulation (AM) - Modulation of radio waves by means of varying the amplitude of an alternating current carrier. The highest frequency of the information is about 10% of the carrier frequency.
Antenna - an electric device that is used to convert electrical energy to radio waves and vise versa.  It can be a simple as a short piece of wire or really elaborate shapes and sizes.
Antenna Switch - a device used to turning on/off RF energy going to/from 1 or more antennae.
Antenna Tuner - a device for matching the impedence between an antenna with the transmission line in order to transmit/receive the maximum amount of energy.

Balun - a term that is a mix of balanced and unbalanced to refer to a transformer used to convert a unbalanced signal to a balanced one.  The unbalanced side usually has one side tied to ground, whereas the balanced side is equally balanced with no reference to ground.
Band Spread - a secondary control used for precise tuning.  One way is have a large tuning device such as a variable capacitor for tuning large sections and then a parallel smaller variable capacitor for fine tuning (i.e. band spread).
Band-Pass Filter - a circuit that allows frequencies to pass while rejecting those above and below the frequencies it's designed for.
Bandwith - measurement of a range of frequencies, usually in reference to a circuits response to those frequencies.
Battery - a device with electrochemicals for storing or producing energy to provide power to circuits.
Beacon Station - an amateur station that regularly sends out signals.  In most cases used for propagation tests or other experiments.
Beam Antenna - a directional antenna that sends/receives signal within a narrow area of coverage. 
Beat-Frequency Oscillator (BFO) - an oscillator that is used to mix or beat with the intermediate frequency to produce audio tone.   Also used to demodulate SSB signals.
Block Diagram - A diagram that uses boxes or blocks to represent more complex devices with connections between blocks representing flow between components.
Broadcasting - transmission of information meant for a disperse audience.  Typically radio and television.

Call Sign - a mixture of letters and numbers assigned to amateur radio operators to uniquely identify them.
Capacitance - ability of an electric circuit or component to store an electric charge.
Centi - unit prefix denoting hundreths.  For example centimeter.
Chassis Ground - a link between different electical components to it's metal casing or cabinet.  Usually to provide a single point or common ground point to the chassis.
Chirp - a shift in frequency up or down when keying a transmitter.
Closed Repeater - ham radio operators use repeaters to reach further.  However to prevent abuse or limit use only certain people are allowed access.  As opposed to open repeaters.
Closed Circuit - a complete connection that allows current to flow. 
Coaxial Cable (Coax) - a coax cable has a center conductor surround by an insulating layer, which has a tubular conductor around the insulating layer. The outer tubing conductor acts as a shield to the enery in the center conductor.
Color Code -
Conductor -
Connected -
Continuous Wave -
Control Operator -
Control Point -
Controlled Environment -
Core -
Courtesy Tone -
CQ -
Crystal Oscillator -
Crystal Controlled Transmitter -
Cubical Quad Antenna -
CW (Morse Code) -

D Region -
Data -
DE -
Delta Loop Antenna -
Detector -
Digipeater -
Digital Communications -
Dipole Antenna -
Direct Current (DC) -
Directional Wattmeter -
Director -
Double-Pole, Double-Throw (DPDT) Switch -
Double-Pole, Single-Throw (SPST) Switch -
Driven Element -
Dual-Band Antenna -
Dummy Antenna -
Dummy Load -
Duplexer -
Duty Cycle -

E-Region -
Earth Ground -
Earth Station -
Earth-Moon-Earth (EME) or Moonbounce -
Electric Field -
Electromotive Force (EMF) -
Electron -
Emergency -
Emergency Traffic -
Emission -
Emission Privilege -
Emission Types -

F-Region -
Fals or Deceptive Signal -
Feed Line -
Filter -
Final -
Frequency -
Frequency Bands -
Frequency Coordination -
Frequency Coordinator -
Frequency Counter -
Frequency Discriminator -
Frequency Modulation (FM) -
Frequency Privilege -
Front-End Overload -
Fuse -

General Coverage Receiver -
Giga -
Grace Period -
Ground Connection -
Ground Rod -
Ground-Wave Propagation -

Half-Wave Dipole -
Ham -
Ham-Bands-Only Receiver -
Harmonics -
Health and Welfare Traffic -
Hertz (Hz) -
High-Pass Filter -

Impedance -
Impedance-Matching Device -
Inductance -
Inductor -
Input Frequency -
Insulator -
Itermediate Frequency (IF) -
Ionizing Radiation -
Ionosphere -

Jumper -

K -

Lightning Protection  -
Limiter -
Line-Of-Sight Propagation -
Lower Sideband (LSB) -
Low-Pass Filter -

Malicious (harmful) Inteference -
Maximum Useable Frequency (MUF) -
Mayday -
Mega -
Metric Prefixes -
Metric System -
Micro -
Microphone -
Milli -
Mobile Device -
Modem -
Modulate -
Moduation -
Monitor Mode -
Morse Code (CW) -
Multimeter -
Multi-Mode Transceiver -

National Electrical Code -
Network -
Nonionizing Radiation -
NPN Transistor -

Offset -
Ohm -
Ohm's Law -
One-Way Communications -
Open Circuit -
Open Repeater -
Operator/Primary Station License -
Output Frequency -

Packet Radio -
Parallel Circuit -
Parasitic Beam Antenna -
Parasitic Element -
Peak Envelope Power (PEP) -
Pecuniary -
Phone -
Phone Emission -
Phonetic Alphabet -
Pico -
PL -
PNP Transistor -
Polarization -
Portable Device -
Potentiometer -
Power -
Power Supply -
Priority Traffic -
Procedural Signal (Prosign) -
Product Detector -

Q-Signal -
QSL Card -
Quarter-Wavelength Antenna -

Radio Amateur Civil Emergency Service (RACES) -
Radio-Frequency Interference (RFI) -
Radioteletype -
Receiver -
Receiver Incremental Tuning (RIT) -
Receiver Overload -
Reflection -
Reflector -
Repeater Station -
Resistance  -
Resitor -
Resonant Frequency -
Reverse Beacon Network (RBN) - a network of stations listening on the bands and reporting when, where, and how strong they receive a signal.  A great way to see if your signal is heard, where, and how strong.
RF Burn -
RF Carrier -
RF Overload -
RF Radiation  -
RF Safety -
Rig -

Safety Interlock -
Schematic Symbol -
Selectivity -
Sensitivity -
Series Circuit -
Shack -
Short Circuit -
Sideband -
Silent Key (SK) -
Simplex Operation -
Single Sideband -(SSB) Phone -
Single-Pole, Double-Throw (SPDT) Switch  -
Single-Pole, Single-Throw (SPST) Switch -
Skip Zone -
Sky-Wave Propagation -
Space Station -
Specific Absorption Rate (SAR) -
Splatter -
Spurious Emission -
Standing-Wave Radio (SWR) -
Station Grounding -
Sunspot Cycle -
Sunspots -
Switch -
SWR Meter -

Tactical Call Signs -
Television Interference (TVI) -
Temperature Inversion -
Temporary State of Communications Emergency -
Terminal -
Third-Party Communications -
Third-Party Communications Agreement -
Third-Party Participations -
Ticket -
Time-Out Timer -
Transceiver -
Transistor -
Transmission Line -
Transmitter -
Troposphere -
Tropospheric Bending -
Tropospheric Ducting -

Unbalanced Line -
Uncontrolled Environment -
Unidentified Communications Signal -
Upper Sideband (USB) -

Variable Capacitor -
Variable Resistor -
Variable-Frequency Oscillator (VFO) -
Vertical Antenna -
Visible Horizon -
Voice -
Voice Communication -
Volt (V) -
Voltage -
Voltmeter -

Watt ( W) -
Wattmeter -
Wavelength -

X -

Yagi Antenna -

Z -


ARRL Ham Bands Chart - Shows each band allocation, what license is required, along with power limits, and emission types.

Popular Bands - No, not rock bands.  The popular ham radio bands or sets of frequencies that are typically popular.

Ham Radio Cheat Sheet - covers what bands each license class has access to, modes of communication, common Q Codes, the Phonetic Alphabet, and Morse code.

US Callsign Prefix Map - Callsigns are assigned based on region of the US they are registered in.  This helps to pinpoint where a callsign is communicating to/from.  Similar map.

World callsign prefix map -

US Amateur Radio Frequency Allocations

Reverse Beacon Network - RBN is a network of stations listening to the bands and reporting what stations they hear, when and how well. Great for seeing how well you're transmitting too.  Also great for seeing what traffic might be going on in the DX world.  I saw a bunch of traffic to find a contest going on in the area.

WSPRnet - Weak Signal Propogation Report - The Weak Signal Propagation Reporter Network is a group of amateur radio operators using K1JT's MEPT_JT digital mode to probe radio frequency propagation conditions using very low power (QRP/QRPp) transmissions. The software is open source, and the data collected are available to the public through this site.

CQ Zones  -

Continents  -

US Grid Square Map -

Grid Locator  - QSOs use grid squares to locate contacts. 

Convert Addresses to Lattitude/Longitude - Useful if you need to find your coordinates to put into grid square locator.  For instance on QRZ you need to update your location.

UTC Time Zones  - add time zone number to local time to obtain UTC.


Newport, NC National Weather Service Office Home Page

W4EHW Home Page - Amateur Radio at National Hurricane Center
Amateur Radio Operators and Volunteer Weather Observers within 300 miles of a hurricane are asked to send information listed on this hurricane report form to the National Hurricane Center. - Tnx N4WKM

Hurricane Tracking Data and Software

Forecasts from North Carolina

U. S. National Weather Service

Intellicast - World weather from NBC.

Top Weather News from USA Today

WRAL-TV Online - Weather Center


Emergency Services

 Many people assume ham radio is just for yacking at someone around the world.  It's much more than that.  When a disaster strikes a whole area could be without electricity and cell phone towers.  So normal emergency communications could be down.  Groups like ARES and RACES come into play.   Ham radio operators that are equipped with battery power and generators can get messages in and out of disaster areas when other forms of communications are down.   Since the ham operators already live in the area they can be used in a short amount of time.  Especially if roads, bridges, etc are out as well. 

ARES - Amateur Radio Emergency Service

Program Your VHF UHF Transceivers for Disaster Preparedness with FRS GMRS PMR MURS BUSINESS WEATHER MARINE HAM Channel Frequencies

Beaufort County and Washington - frequencies for local emergency services.  You can change to a different state/county etc at the top of the page.

Pitt County and Greenville - frequencies for local emergency services.  You can change to a different state/county etc at the top of the page.

RACES - Radio Amateur Civil Emergency Service - a protocol created by the Federal Emergency Management Agency (FEMA) and the Federal Communications Commission (FCC Part 97, Section 407).

Pitt County Skywarn Script - Active/Standby Mode

Newport, NC National Weather Service Office Home Page

W4EHW Home Page - Amateur Radio at National Hurricane Center
Amateur Radio Operators and Volunteer Weather Observers within 300 miles of a hurricane are asked to send information listed on this hurricane report form to the National Hurricane Center. - Tnx N4WKM

Hurricane Tracking Data and Software

Forecasts from North Carolina

U. S. National Weather Service

Intellicast - World weather from NBC.

Top Weather News from USA Today

WRAL-TV Online - Weather Center

Hurricane On-line Report Form NHC

Emergency Radio - ARRL

Weather & Emergency Preparedness

Preparing for a Tornado-1.pdf

NERPC Report

Form ICS-213 - Use if activated

FEMA Independent Study Program - Course

Emergency Preparedness

The Homeowner’s Hurricane Safety Guide

The big list of survival links and books

Home Emergency & Disaster Information - A lot of great information on all sorts of disaster and preparations. 

Disaster Supplies - Be sure you have what you need.



Vintage Radio

Vintage Amateur Radio Sites - WB4IUY Links to the past

WA3KEY Virtual Collins Radio Museum - All about one of the best

Vintage Manuals - Find that vintage manual you are looking for



Project OSCAR - started in 1960 and was responsible for the construction of the first Amateur Radio Satellite OSCAR-1, that was successfully launched from Vandenberg AFB in California.  Visit for latest OSCAR news. 

AMSAT -Radio Amateur Satellite Corporation

ARISS - Amateur Radio on the International Space Station

Real Time Satellite Tracking - defaults to ISS


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