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