U.S. Amateur Radio Extra Exam Prep

Upgrading from General to Amateur Extra opens additional portions of the U.S. amateur bands, but it does not remove the rules governing transmissions. Amateur Extra is the highest U.S. amateur operator class under Federal Communications Commission (FCC) rules. Its broader frequency privileges come with the same need to control interference, keep emissions within authorized limits and operate a safe station.

The qualifying written examination is Element 4. It covers advanced electronics, specialized operating practices and the regulations that apply to amateur stations. A General license holder normally approaches it as an upgrade. Someone starting without a license must satisfy the requirements for Elements 2, 3 and 4, through examination or applicable credit. No Morse code test is required.

Extra study connects operating decisions with the behavior of radio equipment. Frequency is not the same as bandwidth, which describes the span occupied by a signal. A transmitter's displayed carrier can be inside an authorized band while part of its modulated signal falls outside it. Circuit questions require similar care with distinctions such as resistance, which dissipates energy, and reactance, which describes the opposition associated with inductance or capacitance in an alternating-current circuit.

The question pool is organized so that an examination samples different subjects rather than repeatedly testing one familiar topic.

Element

A qualifying examination. Element 4 is the Amateur Extra written examination, not the name of an individual electronics topic.

Subelement

A broad subject area, such as electrical principles or antennas and transmission lines.

Group

A narrower topic within a subelement. One question is selected from each of the 50 groups, so subjects containing more groups contribute more questions.

This structure makes both focused study and mixed practice useful. Working through a circuit topic can reveal repeated unit mistakes, while a mixed round also tests regulations, propagation and operating procedures. A high score on familiar questions does not show how well the remaining subjects are understood. Question identifiers help connect a missed answer to its group and the relevant material without relying on where an answer appeared in a list.

Diagrams are part of the subject, not optional decoration. Schematic questions ask the reader to recognize connections or device symbols; antenna-pattern questions require reading direction and relative signal strength from a plotted curve. Learning the answer wording without understanding the diagram can leave the underlying problem unresolved.

The 2024–2028 Extra pool applies from 1 July 2024 through 30 June 2028. Corrections and withdrawals can occur during that period, so a pool's date range alone does not identify its correction level. Pool study also does not replace current operating rules. A practice score cannot establish competence for high-voltage work, tower climbing or radio-frequency exposure assessment, and it does not confer operating privileges.

How to Use This Tool:

The default is a 50-question exam-shaped round. Practice is untimed, with a choice between explanations after each answer and review after completing the round.

1. Check Pool release and enter your Planned examination date. Only the 2024–2028 release with 4 February 2026 errata is supported, for planned dates from 4 February 2026 through 30 June 2028, inclusive. The initial date is your browser's current local date.
   An unavailable or conflicting saved attempt is not silently replaced. Correct an invalid date where applicable, or use Reset unavailable attempt to discard an incompatible saved attempt and restore the supported defaults.
2. Choose Practice scope and Question count. The initial Exam-shaped · 50 groups / 50 questions scope keeps one question from every group. Entire active pool and the named subelements offer study rounds of different lengths. The largest count includes every eligible item in that selection. Diagram questions can be excluded only for study scopes, not for the exam-shaped round.
3. Select Answer feedback. The default, After each answer, shows correctness and the explanation immediately. At the end of the round hides both until completion, while still recording each response as soon as it is selected.
4. Keep or change Replay seed under Advanced. A seed must contain something other than spaces. Keeping the same release, scope, question count and seed reproduces the questions and option order. Select Start exam practice once the setup warning has cleared.
5. Select one of the four answers, then use Next question. Selection submits and locks the answer immediately; there is no separate confirmation or answer-editing step. Original answer letters remain attached to their wording even when the choices move. On the last question, use View results.
   Wait for a required diagram to load before answering. If Prompt media unavailable appears, the affected question is blocked without credit or silent omission. Use Change setup or Try a new session. A new selection may still contain a question using the same diagram. A diagram failure during review does not remove an already recorded score.
6. Review Missed answer review and the Answer ledger after completing the round. Use Retry missed for another attempt at those questions, or Try a new seed for another selection. Change setup clears the current attempt rather than pausing it.

Interpreting Results:

During a round, the summary counts answers submitted, not answers correct. At completion it changes to correct answers out of the round's total. Ready describes the setup, and Perfect round means that no answers were missed in that attempt. Neither is an assessment of readiness for the licensing examination.

The Subelement performance chart compares correct and missed counts, not equally sized percentages. Some subjects contribute more questions than others. A subelement with no answers has not been tested, and one correct safety question is only one observation. Use the counts to locate subjects worth revisiting, then inspect the actual questions in the Answer ledger before deciding what to study.

For each miss, compare your selected answer with the retained pool key and read the separately authored teaching note. A unit conversion mistake needs a different correction from overlooking a condition in a regulation. The ledger's question identifiers, groups and explanations make those distinctions easier to investigate.

Compare rounds with the same scope, length and feedback timing. Immediate explanations, familiar questions and missed-only practice change what a score represents. A new seed can repeat previously seen items. After reviewing weak subjects, another full group-balanced round provides broader evidence than repeatedly improving a small retry score, but it still does not predict an official result.

Technical Details:

Element 4 draws one question from each official group, so every examination reaches regulations, electronics, operating practices and safety. Correct answers each earn one point. Drawing 50 questions uniformly from the larger pool can leave some groups untested, even though the point total has the same denominator.

Counting correct answers and completed questions

Each keyed correct answer earns one point. An incorrect answer earns zero, with no negative marking or partial credit. Let n be the number of questions in the round, a the number answered and c the number correct. The score is c points out of n possible points, and its percentage uses the entire round as the denominator.

Progress instead measures how much of the round has been answered, regardless of correctness.

Unanswered questions remain in the accuracy denominator but are not counted as incorrect. Missed answers are the answered questions that were not correct. Completion requires every question to be answered, so progress reaches 100% even when some answers are wrong. The raw accuracy calculation and visible progress retain unrounded ratios from 0% to 100%. Counts are whole numbers, n is positive, and zero ≤ c ≤ a ≤ n. The completed summary retains the exact correct/total count.

The official written-element threshold is separate from these practice results. The minimum is 37 correct answers out of 50, equivalent to 74%, not 75%.

Group selection and subject coverage

The exam-shaped round assigns an equal 2% share to each of the 50 groups, giving one question per group. The broader subelements therefore have the following question counts. Practice-entry totals describe the dated collection, not an independently certified measure of everything a candidate needs to know.

Ordinary pool and subelement study samples eligible questions without replacement and without those group quotas. Whole-pool study offers 5, 10, 25, 50, 100 or 599 questions. Excluding diagrams replaces the maximum with 571. Focused subelements have their own smaller count menus. Within one round, the same question is not selected twice.

There are 28 diagram-based items referring to ten original figures. Exam-shaped selection always keeps those items eligible, but does not guarantee that every figure, or every diagram-based item, appears in a round. Removing them produces a partial study selection rather than an equivalent examination.

For a group with answers, its own accuracy uses correct answers divided by answered questions in that group. Let c_g be its correct answers and a_g its answered questions. Multiplying that fraction by the group's 2% share gives its contribution in percentage points.

A group with no answers has no accuracy result or contribution, not a zero-ability result. Contributions are summed into a complete equal-group percentage only for a completed, unfiltered exam-shaped round with an answer in every group. Here it equals the ordinary correct-answer percentage. Study rounds, incomplete rounds and exact missed-item retries do not receive that whole-exam aggregate. Group accuracy is 100 times correct divided by answered questions in that group, in percent. Answered-group coverage sums 2 percentage points for each group with an answer; it records represented weight, not mastery.

A circuit relationship behind the questions

Resonance questions illustrate why understanding units matters as much as recognizing an answer. In the ideal inductance-capacitance model, resonance occurs where inductive and capacitive reactances have equal magnitudes. Its frequency is calculated from the component values.

Here f₀ is frequency in hertz, L is positive finite inductance in henries and uppercase C is positive finite capacitance in farads. Uppercase C is distinct from the lowercase c used for the correct-answer count; π is dimensionless. Microhenries require a factor of 10⁻⁶ and picofarads a factor of 10⁻¹² before substitution. Divide hertz by one million to obtain megahertz. Increasing either L or C lowers this ideal resonance frequency. Resistance does not appear in this expression; the example is not a prediction of every loss or parasitic effect in a real circuit.

Accuracy and Availability Notes:

This is unofficial practice based on a dated copy of the National Conference of Volunteer Examiner Coordinators (NCVEC) public-domain question pool. No affiliation with, or endorsement by, NCVEC, the American Radio Relay League (ARRL) or the FCC is established. The recorded pool check is 22 September 2026, not a promise of live correction checking.

• The collection uses the 31 January 2024 corrected public release with subsequent withdrawals through 4 February 2026. E9E10, E2A13, E6D07 and E4D05 are excluded. Identity with the compiled fourth-errata publication has not been independently verified, and the collection size does not certify every answer, explanation or topic mapping.
• Teaching notes are independently authored, not NCVEC explanations. They flag unresolved comparative wording or equivalent-choice concerns in E2E07, E5D07 and E6D11 while retaining one pool key for scoring. A marked miss on an ambiguous item does not settle the underlying technical question.
• Original figures retain their print-quality limitations. The rightmost drain/source labeling in E6-1 is clipped at the image edge. Curve readings accompanying E9-1 and E9-2 are approximate, not simulated antenna measurements. Text descriptions and a larger diagram view do not remove all graphical uncertainty.
• The browser's current local calendar date must also fall from 4 February 2026 through 30 June 2028, inclusive. After that window, both new rounds and saved attempts are unavailable even if the planned examination date was within range. Earlier historical releases and later pools are not supplied.

Privacy Notes:

If saving an attempt fails, the previous saved URL remains unchanged. Newer in-page answers may be lost on reload, so keep the page open until you have reviewed or recorded them.

Answers are graded in the browser, but a saved attempt is not confined to private browser storage. The page address carries encoded, unencrypted information about the setup, seed, current position and submitted answers. An intact, compatible address can restore the attempt. Anyone receiving that address can inspect its contents, and the address can remain in browser history or reach the website when loaded.

Attempt restoration relies on the saved address, not a dedicated browser-storage attempt database. Loading the page, diagrams and chart or document resources can require network access, as can opening references. Browser grading therefore does not mean fully offline use or that answers can never leave the device. Treat saved links and exported answer ledgers as records of your responses.

Worked Examples:

References:

• 47 CFR Part 97 — Amateur Radio Service, including Sections 97.501, 97.503 and 97.307, Federal Communications Commission.
• 2024–2028 Extra Class Question Pool and Syllabus with January 2024 Errata, NCVEC Question Pool Committee, hosted by ARRL, 31 January 2024.
• Resonance in RLC Circuits, Analog Devices University Program.
• Question Pools and Validity Dates, ARRL.
• Withdrawn Questions, ARRL.
• Upgrading to an Extra License, ARRL.