Ham Radio Technician Flashcards: 90 Core Concepts for 2026-2030
Review 90 core concepts for the 2026–2030 U.S. Technician Class exam across all ten NCVEC subelements.
About this deck
Prepare for the U.S. Technician Class (Element 2) exam pool in effect from July 1, 2026, through June 30, 2030. These 90 core-concept flashcards use one-target prompts, direct answers, and brief explanations across all ten official NCVEC subelements.
This compact deck complements—not replaces—the full 409-question pool, randomized 35-question practice exams, and the three official diagrams. It does not reproduce the official multiple-choice wording, choices, distractors, or answer letters, and it does not claim full-pool coverage.
Facts were checked against the corrected February 19, 2026 NCVEC pool and current 47 CFR Part 97. Card wording and explanations are original. This independent study resource is not affiliated with or endorsed by NCVEC, the FCC, or any examination team. Consult the official pool at https://ncvec.org/index.php/2026-2030-technician-question-pool.
Cards in this deck
Card 1
Question
Which component is commonly used as an adjustable volume control?
Answer
A potentiometer. It is a variable resistor with a movable contact.
Card 2
Question
Which U.S. agency regulates and enforces the Amateur Radio Service rules?
Answer
The Federal Communications Commission (FCC). It administers the rules that govern U.S. amateur stations.
Card 3
Question
Which common voice mode uses less bandwidth: SSB or FM?
Answer
SSB uses less bandwidth. This makes it well suited to crowded HF spectrum.
Card 4
Question
What determines a radio wave’s polarization?
Answer
The orientation of its electric field.
Card 5
Question
What power-supply rating is typical for a 50-watt mobile FM transceiver?
Answer
About 13.8 volts at 12 amperes. The current rating must cover the radio’s transmit demand.
Card 6
Question
What is an amateur band plan?
Answer
A voluntary guide for using different modes and activities within a band. It supplements—not replaces—FCC frequency privileges.
Card 7
Question
How fast does a radio wave travel through free space?
Answer
At the speed of light. Radio waves are electromagnetic waves.
Card 8
Question
What is a fuse designed to do during an electrical overload?
Answer
Open the circuit and remove power. It protects wiring and equipment from excessive current.
Card 9
Question
What electrical quantity causes electrons to flow in a circuit?
Answer
Voltage, or electrical potential difference. Current is the resulting flow of charge.
Card 10
Question
When the station licensee and control operator are different people, who is responsible for proper station operation?
Answer
Both are equally responsible. The station licensee and the control operator share responsibility for compliance.
Card 11
Question
Which two major radio functions are combined inside a transceiver?
Answer
A transmitter and a receiver. Both functions are combined in one unit.
Card 12
Question
Which component stores energy in an electric field?
Answer
A capacitor.
Card 13
Question
What is the defining radiation-pattern advantage of a beam antenna?
Answer
It concentrates radiation in one direction.
Card 14
Question
What bandwidth is typical for an SSB voice signal?
Answer
About 3 kHz.
Card 15
Question
What is a clear way to begin a voice CQ call?
Answer
Say “CQ” a few times, then “this is” and your call sign; pause and listen before repeating.
Card 16
Question
Where does an RF power meter belong when measuring transmitter output to an antenna?
Answer
In the feed line between the transmitter and the antenna.
Card 17
Question
How often must an amateur station identify during a communication?
Answer
At least every 10 minutes and at the end of the communication. A tactical identifier does not replace the assigned call sign.
Card 18
Question
What unit measures electric current?
Answer
The ampere (amp).
Card 19
Question
Where should a fuse or circuit breaker go in a 120-volt AC circuit?
Answer
In series with the hot conductor only. Do not put the protective device only in the neutral conductor.
Card 20
Question
How does wavelength change when frequency increases?
Answer
Wavelength decreases. Frequency and wavelength are inversely related when propagation speed is fixed.
Card 21
Question
What does receiver sensitivity describe?
Answer
The ability to detect weak signals. Better sensitivity means a weaker usable signal can be received.
Card 22
Question
Which component stores energy in a magnetic field?
Answer
An inductor.
Card 23
Question
What does antenna gain describe?
Answer
Signal-strength improvement in a chosen direction compared with a reference antenna. Gain redistributes radiation rather than creating transmitter power.
Card 24
Question
What 10-meter frequency range gives a Technician voice privileges?
Answer
28.300 to 28.500 MHz. This is the Technician phone segment on 10 meters.
Card 25
Question
What does simplex operation mean?
Answer
Both stations transmit and receive on the same frequency. No repeater frequency pair is involved.
Card 26
Question
What bandwidth is typical for a VHF repeater FM voice signal?
Answer
About 10 to 15 kHz.
Card 27
Question
How many milliamperes are in 1.5 amperes?
Answer
1,500 milliamperes. Multiply amperes by 1,000.
Card 28
Question
What conductor is preferred for RF bonding between station equipment?
Answer
Flat copper strap.
Card 29
Question
What hazard can rapid charging or discharging create in an unprotected battery?
Answer
Overheating or out-gassing. Use the battery’s specified protection and charge limits.
Card 30
Question
Which semiconductor component normally allows current in only one direction?
Answer
A diode.
Card 31
Question
When may a newly licensed amateur first transmit?
Answer
After the license grant appears in the FCC license database. Passing the exam alone does not authorize transmission.
Card 32
Question
What does receiver selectivity describe?
Answer
The ability to separate a desired signal from signals on nearby frequencies.
Card 33
Question
What repeater offset is commonly used on the 2-meter band?
Answer
Plus or minus 600 kHz. The sign depends on the repeater’s input/output pair.
Card 34
Question
What shortcut estimates wavelength in meters from frequency in megahertz?
Answer
Divide 300 by the frequency in MHz.
wavelength (m) ≈ 300 / frequency (MHz)Card 35
Question
What happens to a dipole’s resonant frequency when the antenna is shortened?
Answer
The resonant frequency increases. A shorter dipole resonates at a shorter wavelength and therefore a higher frequency.
Card 36
Question
Which electrical property describes energy storage in an electric field?
Answer
Capacitance. Its unit is the farad.
Card 37
Question
What is Doppler shift?
Answer
A change in observed frequency caused by relative motion between transmitter and receiver. Satellite operators compensate for it as the spacecraft passes.
Card 38
Question
What should an antenna installer do about nearby overhead electrical wires?
Answer
Locate them first and stay clear of them. This is an installation-safety rule, not an RF operating technique.
Card 39
Question
Where should a mobile transceiver’s negative power return connect in a vehicle?
Answer
At the 12-volt battery’s chassis-ground connection. Follow the radio and vehicle installation instructions when making the connection.
Card 40
Question
Which amateur transmissions may use deliberately obscured message content?
Answer
Commands to space stations or radio-controlled models. Ordinary amateur messages may not be encoded to hide their meaning.
Card 41
Question
Which semiconductor component can act as an electronic switch?
Answer
A transistor. It can control a larger current with a smaller input signal.
Card 42
Question
What repeater offset is commonly used on the 70-centimeter band?
Answer
Plus or minus 5 MHz.
Card 43
Question
What simple device can suppress RF feedback traveling on a microphone cable?
Answer
A ferrite choke. It adds impedance to unwanted common-mode RF current on the cable.
Card 44
Question
What does a loading coil do in a shortened antenna?
Answer
It electrically lengthens the antenna. The added inductive reactance helps a physically short radiator resonate lower.
Card 45
Question
Which electrical property describes energy storage in a magnetic field?
Answer
Inductance. Its unit is the henry.
Card 46
Question
Which polarization is normally used for long-distance VHF/UHF CW and SSB contacts?
Answer
Horizontal polarization.
Card 47
Question
What is the maximum transmitter power in the HF segments available to a Technician?
Answer
200 watts PEP. That ceiling applies to the Technician HF segments, including 28.0–28.5 MHz.
Card 48
Question
How much clearance should a new antenna have from power wires?
Answer
Enough that no part of the antenna can come within 10 feet of the wires if it falls.
Card 49
Question
About how long does a low-Earth-orbit amateur satellite take to circle Earth?
Answer
About 100 minutes.
Card 50
Question
What happens when an SSB transmitter’s microphone gain is set too high?
Answer
The transmitted audio becomes distorted.
Card 51
Question
What does a CTCSS tone do in repeater operation?
Answer
It provides a subaudible access tone that can open the repeater receiver. It does not encrypt the conversation.
Card 52
Question
What does a schematic diagram show?
Answer
Electrical connections using standardized component symbols. It describes circuit function, not physical placement.
Card 53
Question
What formula gives DC electrical power from voltage and current?
Answer
P = E × I. For example, 12 volts at 2 amperes is 24 watts.Card 54
Question
Where is a half-wave dipole’s radiation strongest?
Answer
Broadside to the wire. Radiation is weakest off the ends.
Card 55
Question
How long is a normal U.S. amateur radio license term?
Answer
10 years. Renewal is required to continue operating after the term expires.
Card 56
Question
What load should replace an antenna for transmitter tests that should not radiate a signal?
Answer
A dummy load. It absorbs RF power while presenting a suitable impedance to the transmitter.
Card 57
Question
What is a proper grounding arrangement for a tower?
Answer
Use a separate eight-foot ground rod at each tower leg, bonded to the tower and to the other rods. Follow applicable electrical codes and local requirements.
Card 58
Question
Why can a VHF signal change sharply when an antenna moves only a few feet?
Answer
Multipath propagation. Reflected signal paths can add or cancel at nearby points.
Card 59
Question
How can an operator judge suitable uplink power through a linear amateur satellite transponder?
Answer
Keep the received downlink signal about as strong as the satellite beacon.
Card 60
Question
What is a DMR color code?
Answer
A repeater access code used by DMR systems. It is not a description of display color or signal quality.
Card 61
Question
What does a power-supply rectifier do?
Answer
It changes AC into a varying or pulsating DC voltage. Filtering can then smooth that voltage.
Card 62
Question
Which receiver control corrects a returned SSB voice that sounds too high or too low in pitch?
Answer
The RIT, also called the clarifier. It shifts the receive tuning enough to restore natural voice pitch.
Card 63
Question
When may a U.S. amateur station normally relay a third party’s message to a station in another country?
Answer
When that country has a third-party communications arrangement with the United States. Emergency or disaster-relief traffic has a separate exception.
Card 64
Question
What form of Ohm’s law gives current from voltage and resistance?
Answer
I = E / R. For example, 12 volts across 6 ohms produces 2 amperes.Card 65
Question
How does coaxial-cable loss change as signal frequency increases?
Answer
Loss increases. The same cable run usually wastes more power at higher frequencies.
Card 66
Question
What does a 4:1 SWR indicate?
Answer
A serious impedance mismatch. It is much worse than the near-1:1 match a transmitter normally prefers.
Card 67
Question
Are amateur radio signals ionizing or non-ionizing radiation?
Answer
Non-ionizing radiation. RF exposure still requires compliance with FCC limits.
Card 68
Question
What is the general maximum transmitter power for Technician operation above 30 MHz?
Answer
1,500 watts PEP, unless a narrower rule sets a lower limit. In actual operation, Part 97 also requires using only the power needed for the communication.
Card 69
Question
What does a DMR talkgroup identify?
Answer
A logical group of users or traffic on a DMR system. It routes a transmission to the intended group.
Card 70
Question
What is a Maidenhead grid locator?
Answer
A letter-and-number designator for a geographic area. Operators exchange it to describe station location compactly.
Card 71
Question
Which component uses an electrical control signal to open or close contacts in another circuit?
Answer
A relay. It is an electrically controlled switch.
Card 72
Question
Which electrical quantity is the same through every component in a series circuit?
Answer
Current. A series circuit has only one current path.
Card 73
Question
Why is the VHF/UHF radio horizon usually a little farther than the visual horizon?
Answer
The atmosphere refracts radio waves slightly. This modest bending extends the practical radio horizon.
Card 74
Question
How should receiver filter bandwidth be set to reduce noise and nearby interference?
Answer
Use the narrowest bandwidth that still passes the desired signal. Different modes need different practical widths.
Card 75
Question
What is the main function of an antenna tuner?
Answer
To match the antenna system’s impedance to the transceiver’s output impedance. It helps the transmitter see a suitable load.
Card 76
Question
What does Part 97 say about deliberately disrupting another radio communication?
Answer
Willful or malicious interference is prohibited. Frequency use is shared, not assigned exclusively to one station.
Card 77
Question
How is a voltmeter connected to measure voltage across a component?
Answer
In parallel with the component.
Card 78
Question
Why does duty cycle matter in an RF exposure evaluation?
Answer
It changes average exposure. A transmitter active for a smaller fraction of the averaging period contributes less average RF energy.
Card 79
Question
What is the central job of a net control station?
Answer
Call the net to order and direct participating stations. Net control organizes check-ins and traffic flow.
Card 80
Question
Which electrical quantity is the same across every branch of a parallel circuit?
Answer
Voltage. Each branch connects across the same two nodes.
Card 81
Question
Which component can step 120-volt AC down to a lower AC voltage?
Answer
A transformer.
Card 82
Question
What does APRS commonly provide?
Answer
Real-time tactical digital communication, including station positions shown on a map.
Card 83
Question
When a DMR radio’s channels, repeater settings, contacts, and talkgroups are saved together, what is that data set called?
Answer
A DMR code plug. It is the radio’s configuration data set.
Card 84
Question
What does standing wave ratio measure in a feed line?
Answer
How well the load impedance matches the feed line. An SWR near 1:1 indicates a close match.
Card 85
Question
What can an operator do during the two-year filing grace period after an amateur license expires?
Answer
Apply for renewal, but do not transmit until the license is renewed. The grace period preserves a renewal path, not operating privileges.
Card 86
Question
Which propagation mode can produce occasional strong 10-, 6-, and 2-meter contacts beyond the normal radio horizon?
Answer
Sporadic E. It can briefly carry signals well beyond ordinary VHF line-of-sight range.
Card 87
Question
Do Part 97 rules stop applying during ARES, RACES, FEMA, or emergency operations?
Answer
No. FCC amateur radio rules always apply. Emergency conditions may activate specific provisions, but they do not erase Part 97.
Card 88
Question
Who is responsible for keeping people below FCC RF exposure limits at an amateur station?
Answer
The station licensee. This is a compliance responsibility; practical evaluations can use calculation, modeling, or calibrated measurement.
Card 89
Question
How is an ammeter connected to measure current in a circuit?
Answer
In series with the circuit path.
Card 90
Question
What decibel change represents doubling transmitter power from 5 watts to 10 watts?
Answer
About +3 dB. A 3 dB increase corresponds to roughly twice the power.
90 cards
Ham Radio Technician Flashcards: 90 Core Concepts for 2026-2030
Flashcards opens so you can start studying.