For more ham radio guides and tips read the articles below:

AGC: Automatic Gain Control – another radio circuit that will automatically adjust receiver gain

AM: Amplitude Modulation

Amateur Radio Service: An FCC sanctioned communication service for all amateur radio operators.

Antenna Gain: An increase in the antenna transmission and the reception performance in a particular direction with the expense of performance in other directions, performance will increase as compared to an isotropic antenna and a dipole antenna.

Antenna Farm: A large array of many amateur radio antennas at a radio station.

Antenna Party: A ham radio tradition in which ham operators gather to assist in the erection of antennas or towers together.

AOS: Acquisition of Signal – Is a Satellite signal reception that only occurs when the satellite comes up over the top of the horizon.

APRS: Automatic Packet (or Position) Reporting System

ARRL: American Radio Relay League – Is an Organization promoting and also supporting amateur radio in the United States of America.

Barefoot: Operating a transmitter without having an amplifier so that the output power is produced by just the base transmitter.

BFO: Beat Frequency Oscillator – is a receiver component that’s used to mix the intermediate frequency down to a lower audio frequency.

Bird: Informal term for a satellite.

Clipping: The leveling aka flattening of the upper and, or, the lower portion of a waveform due to the driving signal going over the output limits of a circuit, particularly that of an amplifier. (AKA “flat topping”)

Coax: Coaxial cable, commonly used as feed-line between the transceiver and the antenna.

CTCSS: Continuous Tone Coded Squelch System – AKA “PL Tone,” a sub-audible tone transmitted with a signal sent to a repeater that opens the squelch of the repeater station so that the signal is received.

CW: Continuous Wave – a transmission mode employing an unmodulated transmission (continuous wave) and also Morse Code patterns of transmission or interruption to send a signal.

dB: decibel – A unit of measure for comparing power measurements of audio.

DCS: Digital Coded Squelch – is a method of breaking down the squelch of a receiver (especially a repeater station) using a digital code at the start of the transmission.

Deviation: In Frequency Modulation, is the variance from the resting frequency of the modulated carrier signal. Deviation is dictated by the amplitude of the audio input signal.

Dipole: A common antenna, typically made of wire that consists of 2 segments: The first is attached to the conductive part of the feedline and the other is attached to the grounded part of the feedline. Usually measures ½ wavelength long, each of the two segments is at ¼ wavelength.

Digipeater: Is a digital repeater capable of temporarily storing, then re-transmitting on the same frequency, of a digital packet.

Director: On a Yagi or Quad directional antenna, any of the elements in front of the driven element.

DLayer: The lowest layer in the ionosphere, it is approximately 25 to 55 miles in the air, that fades away at night and is usually very weak during the shorter winter days.

Double: On a repeater is 2 radio stations transmitting simultaneously.

Downlink: When referencing satellite communication operations it is a frequency used for the satellite-to-earth channel.

Driven Element: The portion of the antenna that attaches to the feedline.

Drop Out: When a radio station is transmitting to a repeater and has insufficient power to consistently break the existing squelch of the receiver and the repeated communication is noisy and broken.

DSP: Digital Signal Processing – is a processing method of filtering and noise reduction, also otherwise modifying received signals done by converting received signals into the digital form for manipulations.

DTMF: Dual Tone Multi-Frequency – are audible tones produced with the keypad of a ham radio transceiver or telephone to affect the dialing or to send the control signals over the air.

Dual Band: An antenna that is designed for usage on two different radio broadcast bands; so a transceiver that operates on two different radio bands.

Dummy Load: Takes the place of a radiating antenna, this is a device that presents a matching impedance for the transmitter and then converts transmission energy into heat instead of radiating a signal; useful for testing transceivers without radiating heat.

Duplex: A radio communication mode that allows simultaneous transmitting and receiving (on two different frequencies).

Duplexer: A radio repeater component that allows a single antenna the ability to transmit and receive simultaneously by implementing a sharply tuned filter to separate the transmission and reception channels.

DX: A distant radio station, usually outside the transmitting station’s country.

DXCC: is an ARRL award for confirmation of contacts made in a minimum of 100 different countries.

DXpedition: A radio expedition to another country from your own, which is usually a a rare or remote location.

Earth Ground: is an electrical connection made to the earth, it is usually to a metal rod driven into the ground.

Echolink: A voice over IP internet connection variety allowing radio stations and/or computers the ability to be connected together for inter communications.

Layer: A layer of the ionosphere that is approximately 55 to 90 miles high and that typically fades away after sunset ocurrs. Responsible for “Sporadic E” (see sporadic E) communications with frequencies above 30 MHz (which is especially for the 6 meter band).

Elmer: A moniker for an experienced and knowledgeable amateur ham radio operator who guides or mentors newer ham radio operators.

Eleven Meter Band: The specific radio band in which citizens radio (CB radio) channels are found.

EME: Earth-Moon-Earth communication, is the term for signals that are reflected off the moon and back to earth; “Moon bounce”

EMF: Electromotive Force (E) – voltage; unit of measure in volts.

ERP: Effective Radiated Power – the power that is radiated by an antenna.

ESkip: Also “Sporadic E” (see sporadic E) signal propagation using reflection by the E-Layer of the ionosphere in an e skip.

F-Layer: The highest possible layers of the ionosphere, from approximately 90 to 250 miles high in total, that provide the longest propagation skips available with HF frequencies of 30 MHz or lower. During the daylight it is two layers, F1 and F2 present. At night it combines these into a single F-Layer.

FCC: Federal Communications Commission – is the US federal government agency that regulates all the radio spectrum and that also sanctions the amateur ham radio service.

FET: Field Effect Transistor – An FET is used as a radio amplifier or a switch for electronic circuits; the input voltage determines the outputs current level.

Field Day: An annual amateur radio event to practice emergency communications with other ham operators.

Field Strength Meter: An analyzing instrument that indicates the relative strength of or presence of an RF field.

Filter: An electronic component or circuit that is capable of allowing the passage of certain frequencies while also blocking others.

Final: (transmission) – The last radio transmission of a station during a contact session.

Flat Topping: Overmodulating the RF signal in such a way that clipping the waveform occurs and distorts the audio results.

FMF: Frequency Modulation Foxhunt: Is a competition event in which hidden transmitters are sought with direction-finding equipment by competitors.

Frequency: The raw number of oscillation cycles per second of the electromagnetic wave. Or for an alternating current. The unit of frequency is measured is hertz.

Frequency Coordinator: An person or a group of people who recommend frequency pair assignments to repeaters in order to coordinate repeater use of the radio spectrum and also to avoid interference between repeaters.

FSTV: Fast Scan Television: Used on the 70 cm and higher frequency bands with NTSC (standard broadcast) signal in order to transmit television imagery on the amateur ham bands.

Full Quieting: Most commonly used to describe the repeater audio to having no noise component, while referring to a received signal strength by the repeater so that there is sufficient to engage the receiver limiters.

Gain: With antennas, there is an increase in the effective radiated power in a specific direction when compared to that of a reference antenna. In the instance such as a half wave dipole antenna or an isotropic antenna. While with transistors, the increase in the signal output of the transistor as compared to the input of the controlling signal.

GHz: Gigahertz, meaning one billion cycles per second (frequency).

GOTA: Get On The Air – An annual ARRL Field Day event in which all non-licensed operators are provided an opportunity to transmit under that of the control operator supervision of a licensed ham radio operator.

Gray Line: The transition area line on the earth separating daylight and darkness. It also promotes an enhanced and higher propagation path for some RF bands.

Green Stamp: A US dollar mailed with a QSL card to pay for postage of a return QSL card.

Ground: The zero voltage reference point of a circuit.

Ground Plane: Is a horizontal conducting surface, or it is a radials extending from the base of the antenna (which is usually a quarterwave vertical antenna) that also produces a virtual image ground element for the antenna, which enhances performance.

Ground Wave Propagation: Radio frequency propagation along the surface of the earth that can extend far beyond the visual horizon.

Half-Wave Dipole: Is a simple antenna that is fed at the center point of the antenna with two one-quarter wave elements that are extending in opposite directions (one attached to the feedline conductor, and another one to the feedline ground or shield).

Handheld: (Handheld Transceiver / HT) – a small transceiver that can be carried in the hand.

Hang Time: The brief continuous transmission of the repeater following the termination of a transmission to the radio repeater, and that is usually denoted by the terminating transmission of the courtesy tones.

Ham: An amateur radio operator.

Hamfest: A ham festival or gathering that at which ham operators and commercial businesses meet, trade, and display their equipment or techniques.

Hertz: Cycles per second, the standard unit of frequency measurement.

HF: High Frequency, defined to be 3 MHz to 30 MHz.

Hi Hi: A slang term used on the broadcast air is the short for laughing.

Homebrew: Home built, as in home built equipment, radios, antennas, and other items.

IC: Integrated Circuit

IF: Intermediate Frequency – the lower frequency value within the superheterodyne radio receiver that is the result of VFO frequency mixing with received RF frequencies, and then that is further processed by mixing the frequency and filtering it to lower the audio frequencies for sound production.

Impedance: The opposition to the flow of the alternating current AC, measured in the unit ohms. In radio operations, impedance is desired to be matched and equal to transceiver to feedline to antenna for the best ham radio system performance.

Inductor: Is an electronic component term, typically that of a coil of wire, that stores energy in a magnetic field for use.

Ionosphere: Is the layers of the atmosphere of the earth that is charged with particles that are induced by the rays of the sun. The ionosphere is able to bend radio frequencies back toward the surface of the earth, providing the long distance, signal “skip.”

IRLP: Internet Radio Linking Project – Is a system of radio repeaters set around the world that are linked by Voice Over Internet Protocol (VOIP).

ITU: International Telecommunications Union – is a United Nations (UN) organization that coordinates the use of the electromagnetic spectrum between all nations.

JOTA: Jamboree On The Air – is an annual Boy Scout radio event in which scouts and hams team up to make contacts with other scouting groups all around the world with amateur ham radio.

J-Pole Antenna: is a half-wavelength radiating radio element with a quarter wave matching stub, popular on VHF and UHF radio frequencies and a popular DIY homebrew build.

Kilo: menas 1000 Kerchunk: which is a radio slang term for briefly pressing the PTT to activate a repeater without identifying yourself.

Key: A switch, or lever, or even a button for sending Morse Code to receivers; referenced by a telegraph key. Alternatively, to push-to-talk, as in to “key the mic” (also see, Key up)

Kilocycles: measurement of thousands of cycles per second, or thousands of hertz per second (kilohertz)

Ladder Line: Is a twin-wire un-shielded transmission line or feed line that is usually used with open space between the existing wires and thereby it is resembling a ladder.

LED: Light Emitting Diode, which is commonly used as a visual light indicator on ham and amateur radio equipment.

Limiter: A processing stage in an FM radio repeater that will limit the amplitude of all received FM signals, this will thereby reduce the receiver sensitivity from amplitude variations and noise.

Line of Sight Propagation: Are radio frequency paths of travel that are referring to a straight line path from one radio station to another station.

Load: Is a radio device in an electric circuit capable of consuming, converting, and radiating energy. A ham radio antenna is sometimes referred to as a load on the transmitter circuit as well.

LSB: Lower Side Band – the single sideband used tradition for bands below 30-meters. (40, 80, 160)

Machine: a common reference for a radio repeater.

Magnetic Mount (mag-mount): Is a ham radio antenna that easily installs to a car or metal surface using a magnet.

MARS: Military Affiliate Radio System – military affiliated amateur ham operators and radio stations that provide free of charge communications for deployed military personnel and others in official federal service.

Mega: Is a prefix that means one million

Megacycles: Millions or cycles per second; also megahertz M

Million hertz Meteor Scatter: Amateur Radio signal propagation made by reflection from short-lived ionization trails of meteors that are in the atmosphere.

Mic: Abbreviation for a microphone.

Micro: Prefix meaning 1/1,000,000 (one one-millionth)

Microwave: The portion of the RF spectrum 1 GHz and higher frequency.

Milli: Prefix meaning 1/1000 (one one-thousandth)

Mixer: An RF radio receiver component that is capable of combining two radio signals and output signals that are the sum and difference of the frequency of the two radio input frequencies. Used in superheterodyne receivers used to produce the intermediate radio frequency.

Mobile: An amateur ham radio station installed in a car or vehicle that can be used while the vehicle is in motion; also used on the radio air to indicate you are transmitting from a mobile ham radio base station.

Mode: The type of signal modulation being employed in radio transmission (FM, SSB, CW, AM, Digital, etc.). Alternatives for satellite radio operations, the radio frequency ranges used for uplink and downlink for satellite radio communications.

Modulation: Encoding radio information into a radio frequency signal. This radio information may be Morse Code, or it can be voice, digital, or other communication forms.

MUF: Maximum Usable Frequency – this is the highest radio frequency for given conditions that will provide the needed reflection from the earth’s ionosphere and will promote skip propagation between two specifically designated radio station locations.

Multimode Transceiver: A radio transceiver with the capacity to use more than just one type of transceiver modulation: With FM, SSB, CW, AM, Digital radio operations.

Negative: On-the-air slang term meaning “No” or “Incorrect”

Negative Offset: Radio repeater input frequency (transmits to) is lower than the repeater output (listen to) ham radio frequency.

Net: An organized, on-air meeting of multiple radio stations, often held at a scheduled time. A net is usually headed by a net control radio station that managed all the radio message traffic and radio transmissions in an proper order.

NiCad: Nickel Cadmium, a common type of rechargeable battery. Not as common today.

NiMH: Nickel Metal Hydride, a common used type of rechargeable battery. Common in ham radio operation equipment.

Node: An Echolink radio station found via a personal computer; alternatively a remotely controlled radio digipeater that is used to relay packet radio communications out.

NTSC: National Television System Committee – US standard signal for broadcast TV, also used for amateur Fast Scan TV.

NVIS: Near Vertical Incidence Skywave – radio propagation in which signals are then reflected from the earth’s ionosphere from a very steep vertical send off angle, which is resulting in a relatively short skywave skip distance. That is usually not any more than a few hundred miles in total. NVIS is typical on low HF radio bands which are (40m, 60m, 80m) where horizontally polarized ham radio antennas are then raised to much less than a half-wavelength above the ground.

Odd Split: Termed for an unconventional pairing of radio frequencies, for example, such as one VHF and one UHF frequency paired together. Odd splits are frequently used with satellite radio operations and with cross band radio repeater functions on some amateur radio transceivers.

Offset: The offset radio frequency that’s separation is between a radio repeater input and it’s output radio frequencies.

Ohm: Is the unit of electrical measurements for electrical resistance and electrical impedance.

Old Man: An on-air term of endearment.

Open Repeater: A ham radio repeater that can be used by any amateur radio operator. These are not restricted or for exclusive use.

OSCAR: Orbiting Satellite Carrying Amateur Radio.

Oscillate: To use vibration with a regular period. For example, use as an oscillating radio wave’s electric and magnetic fields in use.

Oscillator: These are circuits that are typically being employed as an inductor and also a capacitor that is used for producing an alternating current of a desired radio frequency.

Oscilloscope: An electronic test and analyzer tool that receives voltage and current signals and then displays a visual representation of variations in signals over time allowing for tuning and performance measurements.

Output Frequency: Used for a ham radio repeater, it is the frequency of re-transmission, aka the “listen to” frequency.

Over: An over the air term said in two-way radio communications under noisy or difficult hearing conditions to positively alert the other operator of the end of your radio transmission, and return of communications transmission back to the other operators radio station.

Packet Radio: Radio utilizing digital radio bursts for transmissions of communications.

Paddle: A type of Morse Code key used to send morse code messages.

PCB: Printed Circuit Board – is a radio circuit board where electrical contacts and also connections are imprinted for the electronic components to be set to create an electrical connected circuit.

PEP: Peak Envelope Power – This is the signals average power level over its greatest amplitude peaks.

Phase: A phase is referring to RF waveforms and their position relative to the oscillation of electric and also magnetic fields of the compared waveforms. A phase is the 360 degree cycle of oscillation.

Phase Modulation (PM): Phase modulation is when information is encoded into an RF signal. It is done through its varying wavephase characteristics.

Phone: When a radio encodes voice information from a transmission into an RF signal.

Phone Patch (Autopatch): Creating a phone patch is when a connection is created between a phone and a two way radio. This is generally performed by repeater stations in order to communicate between phones and two way radios.

Picket Fencing: Picket fencing is when there is a rapid fluctuation in sound or a signal that is caused by a radio station that is moving during a transmission. It also refers to the interference this motion causes.

Pileup: A pile up is when multiple ham radios attempt to make calls to the same station at the same time.

PL: Stand for Private Line, while not an actual private line, it refers to CTCSS tone implementation.

Portable: This refers to a ham radio base station that is capable of being easily moved from one location to another for operation on the go. This is different than a mobile ham station which is designed specifically for use in vehicles.

Positive Offset: This is a radio repeater input frequency that is higher input than the repeaters output frequency.

Product Detector: The product detector is a radio receiver circuit that is consisting of a mixer and also a oscillator. It is utilized for the reception of SSB and CW signals.

Propagation: Propagation refers to the RF signals path of travel and how the RF signal travels.

PSK31: Stands for phase shift keying 31. This is a phase shift that utilizes a digital mode in order to encode characters at 31.25 baud rate. This is used for computer keyboard to computer keyboard communication. This is often used in high noise environments.

PTT: Stands for push to talk. This is a button or switch on the radio microphone that readies the radio for sending audio transmissions. It also can refer to the circuitry that makes this function possible.

QSignal: A Q signal are common used questions and statements abbreviated to three letters. These signals are derived from Morse Code.

Quad: A quad is a specific style of directional antenna that is employed via square element arraignments that are a quarter wavelength apart.

QRP: This is a Q signal (see Q signal) that stands for reduced power and also a low power radio station operating at five watts or fewer.

QSL: This is a Q signal (see Q signal) that stands for acknowledged receipt of message. Also used in place of I copy and I understand.

QSL Card: A QSL card is exchanged between radio operators that confirms their contact and establishes a record of their contact exchange.

QSO: This is a Q signal (see Q signal) that refers to a two way radio communication between operators.

Quagi: A quagi is a style of directional radio antenna made by the user, aka homebrewed, that utilizes both Yagi and Quad antenna features.

RACES: Stand for Radio Amateur Civil Emergency Service. This is a group of volunteer radio operators who assist civil authorities during an emergency situation.

Rag Chew: This refers to a longer casual conversation between two ham radio operators.

RDF: Stands for Radio Direction Finding.

Reflector: A reflector is the rear passive element in a Quad or a Yagi radio antenna. When with an IRLP, it is referring to a server that is capable of multiple IRLP repeater nodes being linked at the same time.

Refract: This refers to the bending of an RF transmission through the ionosphere.

Repeater: A repeater is a radio station that receives a radio transmission and then re transmits the original frequency as a different frequency at higher power, or from a higher position. This extends the radios range.

Repeater Directory: This is public listing of all repeaters.

Resonance: The resonance is an efficient promotion and reinforcement of alternating current within a circuit.

RF: Radio Frequency

RFI: Radio Frequency Interference

Rig: Slang for an operators radio setup.

RIT: Receiver Incremental Tuning. Also known as a clarifyer. It is a transceiver control feature that is capable of adjusting the radios frequency without having to change the frequency of the transceiver. This feature is generally used in SSB radio operations.

Roger: A radio communication term that means the received message was understood.

Rover: A rover is a radio competition where a station moves through a grid square, a county, or any other geographic area.

RST: Readability Signal Tone. This is a report measured in three digits that shows how well received a signal is.

RTTY: Radio Teletype which is a digital mode of communication.

Rubber Duck: A short rubberized radio antenna used on a handheld radio transceiver.

Selectivity: This refers to a radio receivers effectiveness at rejecting radio signals on adjacent frequencies. This exhibits the radio transceivers quality.

Sensitivity: Refers to a radio receivers capabilities of detecting and receiving weak radio signals.

Shack: A slang term for the location of a ham radio operators rig.

Silent Key: A term for a ham radio operator who has passed away.

Simplex: Simplex refers to radio communication when transmission and reception occurs on the same frequency.

Skip Zone: A skip zone, when referring to ionosphere skip propagation, is the area inside the skip zone but also past the ground wave propagation. It is not able to be reached with the current frequency unless by a weak and scattered signal.

Sky Wave: A sky wave is the propagation of the radio emissions caused through ionosphere refraction.

SMeter: An S meter measures the signal strength of received signals.

Splatter: Splatter refers to the interference received from stations on nearby frequencies. It can be the transmissions from a transceiver that is greater than the bandwidth necessary for normal communications that causes interference.

Split Operating: Split operating is when transmission from one frequency while listening on a different radio frequency. This often is on an HF SSB and used to minimize congestion on the transmitting frequency.

Sporadic E: Sporadic E is when irregular patches of the E layer of the ionosphere activation are randomly refracted at higher frequency signals than are usually skipped. Sporadic E is generally used on the 6 meter band for skip propagation.

Spurious Emissions: These are signals from a radio transmitter that are undesired and outside of the tuned frequency range.

Squelch: The squelch on a radio is the control for muting the audio of the transceiver when there are no signals being received.

SSB: Stands for Single Sideband. An SSB is a specific type of AM signal. It uses just one of the two sidebands while also deleting the carrier frequency from radio transmissions.

SSTV: Stands for Slow Scan TV. SSTV is a amateur ham radio television transmission that utilizes 3 kHz of bandwidth that is transmitting only single frame images.

Superheterodyne: This is a specific style of radio receiver that utilizes frequency mixing with the incoming radio signals in order to shift the modulated signals for processessing audio from a lower frequency.

SWR: Stands for Standing Wave Ratio. This is measurement of the voltage sent from the radio transmitter that is reflected back from the antenna and feedline to the transceiver.

SWR Meter: An SWR meter is utilized to tune the antenna for proper performance and to prevent transceiver damage from reflected power.

Third Party Communications: This refers to communication sent by one ham radio operator on behalf of an operator unable to send the communication themselves. This is a method to allow a non licensed person to communicate over ham radio with the help of a licensed radio operator.

Ticket: A ham radio slang term referring to an amateur radio license.

TimeOut: When referring to a repeater it is the timer circuit that can be used to avoid extra long transmissions or what is called a stuck mic condition. The time out cuts the transmission off based on settings picked by the operator.

Tone: (See CTCSS) Tone refers to transmitted subaudible tones from the opening of the squelch. It is utilized to send activation codes.

TNC: Stands for Terminal Node Controller. A TNC allows interfacing with the transceiver through a control box. Primarily refers to packet radio operations.

Traffic: Traffic refers to a radio message that has been distributed over a net.

Transceiver: A transceiver is a unit that has the transmitter and the radio receiver in one device. It can both send and receive radio transmissions.

Tropospheric Ducting: This refers to VHF signal propagation over long distances. This occurs along a pipe that is created through a temperature inversion in the lowest part of the atmosphere.

UHF: Stands for Ultra High Frequency. It has a range of 300 – 3000 MHz frequency. Includes the 70cm band and higher frequencies.

Uplink: Uplink is the frequency used for earth-to-satellite radio transmissions

USB: Stands for Upper Sideband. USB is used in Single Sideband radio operations. the sideband is made of frequencies that are higher than the carrier frequency the transceiver is tuned to.

UTC: Stands for Universal Time Coordinate. It is also commonly known as Coordinated Universal Time. This is the 24 hour time reference based upon Greenwich, England’s time and the 0 degree Meridian line.

Volt: the basic unit of electromotive force (EMF)

VAC: Volts Alternating Current

VE: Stands for Volunteer Examiner which is the person who issues license exams in the amateur radio service.

VEC: Stands for Volunteer Examiner Coordinator. The VEC is an amateur radio organization that is coordinated along with the FCC to operate and oversee all volunteer radio examiners

VFO: Stands for Variable Frequency Oscillator. This is a unit utilized in order for a transceiver circuit to be used to tune the transmission frequencies in both reception and transmission.

Velocity Factor: This is a measurement of the electromagnetic signal propagation speed through the feedline. The reading is a percentage of the speed of light.

VHF: Very High Frequency – 30 – 300 MHz frequency. Includes the 6m to 1.25m amateur bands

VLF: Very Low Frequency – 3 – 30 kHz frequency

VOX: Voice Operated Transmitting

VSWR: Stands for Voltage Standing Wave Ratio. This is a commonly used SWR measure that utilizes voltage.

WAC: Stands for Worked All Continents. It is an award from the IARU and administered by ARRL.

WAS: Stands for Worked All States. It is an ARRL award to confirm contact in all 50 US states.

WAZ: Stands for Worked All Zones. It is a CQ magazine award for confirmed contact with each of the 40 world zones.

Work: A Ham radio slang term that means an operator has communicated with other operators as stated in locations.

XIT: Stands for Transmitter Incremental Tuning. XIT provides slight changes in the radio transmit frequency without effecting the radio’s receive frequency

XYL: Is an On-air slang for Ex-Young Lady which means an operator’s wife.

Yagi: This is an antenna that is a directional beam style.

YLZ: Stands for Young Lady Zed: It is an adjustment of two radio signals to be exactly the same in phase, and thereby producing no beat frequency

Zepp Antenna: An end-fed wire radio antenna that is reeled down and up from Zeppelin aircraft.

Zulu: An alternate term for referring to UTC (see UTC).

73: Best regards

88: Love and kisses

807: A deceptive ham term for ale and also a popular transmitting tube of the early 20th century.

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