||"Slashed Zero" - distinguishes a ZERO from the letter "O".
Intended to resolve ambiguity in callsigns like ""WØOF". Not needed
for callsigns like "W0RK".
Can be produced by
pressing AltØ216 on your PC keyboard (Note: you must use the numeric keypad, not the numbers across the top row
of the keyboard. This method should work in most PC-based editors such as e-mail clients, word
Regards" (Source: "Morse Code: The Essential Language", 2nd Ed., ARRL
|| An old glass vacuum tube, several inches tall and around. Also, slang for a beer, as in "there's nothing like a cold 807 on a hot Arizona afternoon" (thanks to W7QY).
According to our friends in Ireland, a pint of Guinness is known as a "Black 807" (thanks to GI4FUE).
|| Amplitude Compandored Sideband modulation
Gain Control"; a circuit in a radio which automatically adjusts the overall gain of
|| Linear index for measuring the disturbance level in the earth's magnetic field. The index is
defined over a period of one day (Courtesy of IPS Radio and Space Services, Sydney, Australia).
||"Amplitude Modulation"; slang often used is "Ancient Modulation" (courtesy of VE3FFK).
Teleprinting Over Radio"; popular digital mode on HF
|| The ratio of the power required at the input of a loss-free reference antenna to the power
supplied to the input of the given antenna to produce, in a given direction, the same
field strength at the same distance (def. courtesy of Telecom Glossary
|| A long-standing tradition among hams where several gather to assist a fellow ham in mounting
antennas and/or towers. Often accompanied by malt consumables and lies AFTER the tower
and the antennas are up and working...well, the consumables anyway (thanks to WD5CTQ).
||"Acquisition of Signal" from a satellite; occurs when the satellite becomes "visible" to the antenna
as it comes up from the horizon.
Radio Relay League"; A U.S.-based organization which exists to support Amateur Radio.
For more information, please visit http://www.arrl.org.
Television"; typically found on the 430 MHz and 1.2 GHz bands; see http://www.hampubs.com/atv.htm for more information (thanks to KG4LXA for the suggested link).
Wire Gauge"; a system of describing the diameter of wire by which the wire size
increases as the gauge number decreases.
to running your transmitter without an amplifier (in other words, the "power
out" is being produced entirely by the transmitter, without any assistance from an
|| Beat Frequency Oscillator
|| 1. nickname for "satellite", in the case of Amateur Radio, examples include
RS-12/13 (Radio Sputnik) and AO-40 (AMSAT-OSCAR). See http://www.amsat.org/amsat/sats/n7hpr/satsum.html and http://www.hampubs.com/satellite . 2. brand name of a high-end, high quality directional wattmeter.
|| A signal produced within a radio, typically by it's microprocessor or related circuitry,
that appears at specific intervals across the tuning dial of a receiver. Usually it is
a product of mixed intermediate frequencies within the radio. Considered bad form.
|| Slang for a large, heavy, usually old radio, typically restored (courtesy of VE3FFK).
||"Binary Phase Shift Keying"; a modulation technique used in LowFER and MedFER operation,
as well as HF operation. For more information, see http://www.computerpro.com/~lyle/watsbpsk.htm (courtesy of KØLR).
|| A mechanical keying device for transmitting Morse Code semi-automatically.
|See "QSL Bureau"
|| General Electric's trademarked name for CTCSS. (RCA called it Quiet Channel, or
|| Call Book Address
||"Covenents, Conditions, and Restrictions"; an extensive set of rules drawn up by homeowner's
associations and their lawyers which, among other things, typically restrict or completely
prohibit a homeowner from having most forms of antennas on his/her property. Such
regulations are formed and placed upon the property before the home is initially sold, and
typically remains in effect for the life of the home.
|| See "Call Guard"
cable; RF transmission line; used to connect an antenna to a radio; "coaxial"
indicates that the conductors are about the same axis, with a center conductor being on
that axis, and the "shield" wrapped around the axis (dielectric separates the
center conductor and the shield wires).
Tone-Coded Squelch System", also known as "PL" ("Private Line",
trademarked term by Motorola), "Call Guard" (trademarked by GE), or
"subaudible tone". A means of transmitting a tone along with your
signal. This tone tells a receiver to open up its squelch so that the signal is
received. This method is commonly used with repeaters.
Wave"; popular digital mode on HF which utilizes Morse Code; regarded by many as the
*first* digital mode.
|| Digital Coded Squelch
||"From" in CW-speak
|| The resultant frequency swing of a signal that is frequency modulated (FM).
non-conductive material used to separate the center conductor and shield (conductor) in
coaxial cable; typically made of foam or plastic.
the most common wire antenna amongst hams, the easy-to-homebrew dipole consists of two
legs (each 1/4 wavelength) which typically extend horizontally and away from each other. One leg connects to the coax's center conductor, and the other leg connects to the
coax's shield as a counterpoise. The dipole antenna is usually strung in a
horizontal fashion between trees, and works best when at least 1/4 wavelength
above the earth.
CW abbreviation for "dear", used as a respectful salutation. Example
"GOOD EVENING, DR JOHN, HW ARE U?"
||An "arm" of a yagi antenna to which RF power is fed from the coax.
|| Double Suppressed Sideband modulation
|| Russian abbreviation for "goodbye" on CW.
||"Dual Tone, Multiple Frequency"; a tone that is actually comprised of two different tones
sounded at the same time. It is what you hear when you use the pushbuttons on a standard non-pulse
telephone in the U.S. It is also a common way to send analog numeric information, since each numeral
between Ø and 9 has its own separate tone (and also # and *, and in the case of some radios, A, B, C, and D).
|| Typically a power dissipating resistor or device substituted in place of an antenna
on a transmitter, used for testing purposes.
distance; making contacts over long distances. For HF contacts, "DX" is
typically considered as such if the station contacted is outside of your country. In
some other cases, making a contact over what is considered extremely long distances (for
the conditions and band) can be considered "DX" (i.e., a QSO from one end of a
state to another, on 2 meters simplex, can be considered "'DX").
Century Club". An ARRL-sponsored club by which membership is allowed only after
showing proof of having made contact with at least 100 different countries. For more
information, please see http://www.arrl.org.
from the words "DX" and "expedition", this term typically refers to a
trip made by experienced ham operator(s) to a "DX" country for the purpose of
providing other hams an opportunity to make a contact (QSO) into that country.
communication; moonbounce; using the moon as a reflector to "bounce" your signal
back down to Earth. For a complete resource, please see http://www.nitehawk.com/rasmit/ws1_1.html
||"Effective Radiated Power"; the power supplied to an antenna multiplied by the antenna gain in a
given direction (if the direction is not specified, the direction of maximum gain is assumed).
|| Face-to-face meeting, as in "eyeball QSO" (to speak to one another in person).
||"Fine Business"; cheerful acknowledgement, or adjective for describing a good quality.
|| A once a year contest sponsored by the ARRL where hams go to remote sites and operate for
24 hours. Used to assist hams in emergency preparedness as well and to practice not sleeping,
treating insect and other vermin bites and the drinking of cold coffee and the ever
present telling of lies. Great fun for all! (thanks to WD5CTQ)
|| The sending style of a particular CW operator. In the old days, telegraphers knew each
other by their "fists" (thanks to WD5CTQ).
|| Frequency Modulation
Class CW Operators' Club"; an exclusive CW club based out of the United Kingdom.
|| As it applies to antennas, see Antenna Gain
|| U.S. dollar bill sent along with a QSL card (instead of an IRC) to offset postage costs of a return card.
|| 1. Children. 2. Secondary RF emission that is a multiple of the fundamental emission.
Frequency"; generally regarded as the band of frequencies between 1.8 MHz and 30 MHz
to equipment that is "home built"; something you built yourself.
a unit used to measure frequency. Typically used with "Kilohertz" (KHz) to
indicate 1,000 Hertz, or "Megahertz" (MHz) to indicate 1,000,000 Hertz.
|| A method of Morse Code keying. Holding both paddles at same time sends alternating dits and dahs (courtesy of VE3FFK).
|| Derived from the expression "Intermodulation Distortion" (IMD). A problem caused
in the receiver of a radio by a nearby transmitter's spurious signals which may fall on or
very near to the receiver's receive frequency. In some cases, a perfectly clean transmitter
(i.e., no spurious signals) can produce intermod if it overloads a receiver or if there is
some other point for 3rd order intercept. Intermod which is close, but not
necessarily right on, the receiver's frequency can cause the receiver to become less
sensitive (also known as "desense").
on the Air"; for more information, please see http://www.islandchaser.com/.
|| Slang for "IQ of zero"; an idiot (courtesy of GI4FUE).
Reply Coupon". A system by which most country's postal systems provide a coupon
which can be purchased, and then used by a sender in any other country to obtain return
mail postage. This system allows you to provide return postage for those in another
country, especially useful when you do not have access to that country's postage stamps or
currency. IRC's are frequently used to assure return postage for a QSL card.
For more information, please see QRZ's "QSL Corner" at http://www.qrz.com/qsl.html.
|| An antenna design that is relatively easy to assemble yourself. For more information, see http://www2.arrl.org/tis/info/JPole-V.html (Courtesy of ARRL). Note: The basic J-pole design can be applied to any frequency, as long
as measurements are proper for that frequency. Furthermore, a 2-meter J-pole will
also resonate on the 440 MHz (70 cm) ham band, making for a reasonable dual-band
||"Kilocycle"; equivalent to KHz; regarded as an "old fashioned" way of describing frequency.
|| Device used by hand to produce Morse Code; can contain either a single, vertically travelling arm (see "Straight Key")
or horizontally travelling paddles (see "Paddles") that are used to make ground connection and produce the Morse Code.
|| Electronic device for sending Morse Code semi-automatically; connects to a key (see above).
Dits are sent by pressing one paddle [of the key], dahs sent by pressing the other one (courtesy of VE3FFK).
|| See Hz
|| A three hourly index of geomagnetic activity relative to an assumed quiet day curve for
the recording site. K index values range from 0 -very quiet- up to 9 -extremely disturbed- (Courtesy of IPS Radio and Space Services, Sydney, Australia).
term, often referring to a CW operator with very poor practices and manners.
||"Lithium-Ion". A type of rechargable battery commonly used
with radio equipment.
||"Loss of Signal" from a satellite; occurs when the satellite becomes "invisible" to the antenna
as it goes below the horizon.
|| One who experiments with radio communications at unusually low frequencies (typically 1750 Meters, which
is 160-190 kHz and can be used under FCC Part 15). For more information, take a look at http://www.altair.org/lowfer.htm (courtesy of N4YWK).
|| Lower Sideband
|| Slang for "repeater", and sometimes for rig.
|| A device placed between a transmitter and an antenna to tune the circuit to resonance.
Normally called an Antenna Tuner (thanks to WD5CTQ).
||"Megacycle"; equivalent to MHz; regarded as an "old fashioned" way of describing frequency.
|| One who experiments with radio communications at low frequencies such as those on the edges of
the AM broadcast band (under FCC Part 15).
Produced Rig"; a radio which is produced in large quantities; often used to describe
radios that are NOT originally purchased in "kit" form.
Useable Frequency"; that frequency above which expected propagation no longer exists.
|| Noise Blanker
|| Net Control Station
|| Or "Ni-Cad"; "Nickel Cadmium". A type of rechargable battery
commonly used with radio equipment.
||"Nickel Metal Hydride". A type of rechargable battery commonly used
with radio equipment.
|| See "P-N Junction".
|| See "P-N Junction".
||"National Traffic System". Please see http://www.weca.org/nts.html for more information.
Man"; affectionate way to address a fellow ham operator, like saying "Old
Observer"; a volunteer of the ARRL's Official Observer program who monitors the
airwaves for FCC rules violations. For more information, please see http://www.arrl.org.
|| Short for "Morse Code Key", one that contains small paddles that are tapped in order to produce
semi-automatic Morse Code (when connected to a "keyer").
|| Short for "Phone Patch".
||"Peak Envelope Power"; used to measure power output of an single sideband signal.
|| Device allowing audio from a telephone line to be placed in the audio circuits of a
transmitter/receiver (thanks to WD5CTQ).
|| A P-N junction (or N-P junction) is formed by creating two substrate materials of P type
and N type on a semiconductor. P type means it is doped with "free holes" (electron depletion)
and the N type is doped with electrons. Of course by physics, the free holes and
free electrons would like to neutralize each other.
A diode is formed with a P-N junction.
Basically, when you have a NPN transistor, you have two junctions ... an NP junction between
the collector and base, and a PN junction between the base and emitter. Vice-versa with a PNP transistor.
How you bias those junctions controls how the transistor works.
|| FCC Notice of Rule Violation
||"Private Line", Motorola's trademarked name for CTCSS.
|| Phase Modulation or Pulse Modulation
|| See "P-N Junction".
|| A digital mode which is rapidly growing in popularity; utilizes phase shift keying (PSK)
which is transmitted at 31 baud (speed). For more information, please see http://www.psk31.org.
to Talk"; a button on a microphone or on the side of a handheld radio which activates
of merit" with regard to a tuned circuit (source: ARRL Handbook). With
regard to an antenna circuit, the Q has an inversely proportionate relationship to useable
bandwidth (with reasonable SWR). For example, an antenna with "high Q" will not provide a good SWR over a very wide range of frequencies.
||"Quarter Century Wireless Club", an organization for hams who have held a license for 25 or more years.
For more information, see http://www.qcwa.org.
developed by CW (Morse Code) operators to make certain, frequently used phrases short and
concise -- a sort of Morse Code "shorthand". Common signals include
"QST" (announcement), "QSL" (confirmation), and "QTH"
(location), and "QRZ" ("who is calling me?"). For more
Q-signals, please see http://www.xcvr.com/default.asp?view=qsignals.
known as the "buro"; an organization that provides a collecting and distributing
point for QSL cards. In large scale situation, typically broken into an
"incoming" and "outgoing" bureaus. A good example is the biggest
QSL Bureau representing the U.S., the ARRL QSL Bureau. For more information, see
ARRL's Incoming Bureau at http://www.arrl.org/qsl/qslin.html and their Outgoing Bureau at http://www.arrl.org/qsl/qslout.html.
referred to as simply a "QSL"; similar in size to a postcard, it is used to
"confirm" (or show proof of) having made contact with another station on the
air; applies to both "two-way" and "one-way" (SWL) communications; the
QSL card is filled out by the issuer/sender, and by convention it contains (1) the station
contacted, (2) UTC date and time of contact, (3) frequency/band, (4) signal report (RST),
and (5) callsign and address of issuer/sender. QSL cards are commonly used as proof
of fulfilling various operating awards such as DXCC, WAS, etc.
person, commonly an Amateur Radio operator, who manages the receiving and sending of QSL
cards for a particular Amateur Radio station (the "managed" station).
Often, a QSL Manager performs this service because the managed station either has
difficulty handling the volume of incoming QSL cards, or the station is geographically
located such that it is difficult or impossible for that station to accept and/or send QSL
cards. It is very common for "rare" DX stations and DXpeditions to have a
|| A system consisting of at least one transmitter, one receiver, and a controller, which
receives a signal on one frequency and retransmits it on another frequency.
Repeaters are typically located in high locations so that they have greater coverage
area. They greatly increase a user's communication range since they can retransmit
his/her signal across all of its coverage area. Repeaters are most commonly used on
the 2 meter and 70 centimeter bands. See also "Simplex Repeater".
Frequency"; typically used as slang for "Radio Frequency Energy".
painful sensation felt when coming into direct contact with RF energy; can be dangerous
when experienced with high levels of RF power.
||"Receive Incremental Tuning"; a common feature on HF radios that allows the user to slightly
change the receive frequency while leaving the transmit frequency the same.
Strength, Tone"; a system by which a received signal quality is graded, and
a signal report is given. "Readability" is judged on a scale from 1 to 5,
and "Strength" and "Tone" are judged on a scale from 1 to 9.
"Tone" does not apply to a "phone" (voice) signal. A very high
quality CW signal is "599" (pronounced "five nine nine"), and such a
phone signal is "59" (pronounced "five nine").
Teletype"; popular digital mode on HF
|| Also known as "Rubber Duckie", a flexible antenna normally found on hand-held tranceivers.
Inefficient, but useable, and they don't poke you in the ribs too badly either! (thanks to WD5CTQ).
|| Abbreviation for "receiver" or "receive".
Addressed, Stamped Envelope"; for more information, please see QRZ's "QSL Corner" at http://www.qrz.com/qsl.html.
|| See "Solar Flux Index"
|| Communicating directly from radio to radio (without the use of an intermediary repeater). This
term is normally used in the context of environments that frequently use repeaters.
|| A radio that has a digital audio store-and-forward relay system. Produces results similar
to that of a conventional repeater.
|| A short, cylindrical unit that is inserted into a Bird® Wattmeter (or similar) that allows the
unit to read power (watts) for a particular frequency range. A slug always has a finite frequency
range and a maximum power rating. By swapping out different slugs, the wattmeter can be used
for many different frequencies and power ranges.
|Solar Flux Index
|| A measurement of radio emission from the sun. HF propagation conditions are considered good
when this number is high and the A- and K-index numbers are low.
|| A radio operating event, usually on HF, in which a group or organization celebrates an event
or holiday by making contacts and offering special QSL cards or certificates to confirm
the contact. Ham Radio magazines, such as QST, usually publish a monthly list of
|| Single Sideband
|| A device for sending Morse Code, consisting of a single arm making contact with another point
to complete a circuit and key a transmitter (thanks to WD5CTQ).
|Switching Power Supply
|| A power supply that uses switching transistors (on-off) to increase the efficiency of the
power conversion, rather than the simple transformer/rectifier design of traditional power supplies.
||"Shortwave Listener"; one who enjoys listening to shortwave transmissions, without intention of
Wave Ratio"; an indication of how well matched an antenna is to its transmitter.
A "one to one" (1:1) SWR indicates a perfect match. Anything less
than 1:1 (i.e., 2:1) indicates that the antenna is not perfectly resonant for the transmit
frequency, and that some RF power is being reflected back down the transmission line into
the transmitter. In general, any SWR which is 3:1 or better is acceptable.
|| Same as "Simplex" (see definition above).
|| Slang for "FCC License"
|| See "P-N Junction".
|| Abbreviation for "transmitter" or "transmit"
|| Upper Sideband
Universal Time; a single time reference to be used worldwide (reduces the confusion that can
occur when considering multiple time zones).
Exam Coordinator". Examples include the ARRL (http://www.arrl.org) and W5YI (http://www.w5yi.org)
||"Voice Operated Relay"; allows the presence of a sound to trigger the PTT.
||"Worked All Continents"; an award issued to those who make, and have proof of, contact to at least one
ham on each continent.
|| Slang for QSL Cards and operating/contest certificates.
||"Worked All Neighbors"; a station that continually gets complaints about signals showing up
on the telephone or televisions at neighbor's houses. Not a desired situation. Polite conversation and
changes in operation practices are a common solution. Another is providing simple and
often inexpensive filters for the offended neighbor. See the TVI solutions page at the ARRL web
site for more information on cures (courtesy of K4GVN).
Administrative Radio Conference"; most commonly associated with the "WARC
Bands", those bands added to the Amateur Radio band plan which include the 30, 17,
and 12 meter HF bands.
||"Worked All States"; an award issued to those who make, and have proof of, contact to at least one
ham in each U.S. state.
||"Weak-signal Operation on Low Frequency" - for more information, see http://www.computerpro.com/~lyle/wolf/wolf4dummies.htm (courtesy of KØLR).
|| An instrument of sadistic torture for hams who do not follow generally accepted rules of courtesy
on the air. It looks something akin to a Saguaro cactus with one arm missing (courtesy of AA7VP) Note: [the truth] The Wouff Hong sprang from the imagination of ARRL cofounder Hiram Percy Maxim, W1AW,
as a means to combat poor operating.
|| A radio station located in Fort Collins, Colorado, that continuously broadcasts standard
time of day and other radio and navigation information. For more information, see http://www.lerc.nasa.gov/WWW/MAEL/ag/wwv.htm.
|| A radio station located in Kauai, Hawaii, that continuously broadcasts standard
time of day and other radio and navigation information. For more information, see http://www.chem.hawaii.edu/uham/wwvh.html.
|| Abbreviation for "weather"
||"Transceiver" (a unit integrating both a transmitter and a receiver).
Incremental Tuning"; a common feature on HF radios that allows the user to slightly
change the transmit frequency while leaving the receive frequency the same.
antenna consisting of two or more elements ("arms" that run perpendicular to a
common boom) which are fed parasitically from one or more "driven" elements.
The number of elements is proportionate to the gain (more elements means more
Lady"; short for "girlfriend"
|| A way of saying the letter "Z"; considered by many to be a more precise way of
expressing that letter "Z"; prevents others from confusing "Z" with
"E", "P", etc.
used to refer to UTC (see above), as in "Zulu Time".