T Technician
6 / 11 units
Entry licence: VHF/UHF voice and data, 6 m and 10 m privileges, 1500 W PEP ceiling.
Start this trackYour licence progress, one unit at a time
Three tracks, thirty-one study units and 310 questions. The rings show how much of each licence class has been published so far; your own answered-question count is tracked in this browser only, and fills the thin bar at the very top of the page.
G General
5 / 10 units
Adds HF phone on 80/40/20/15/17/12/10 m, 60 m channels and worldwide DX.
Start this track
E Amateur Extra
5 / 10 units
All amateur privileges, including the lower 25 kHz of each HF phone band and 1x2 call signs.
Start this trackQuestion of the day
An amplifier delivers 100 watts into a 50 ohm load. What is the current in the load?
Key B — About 1.41 amperes
Use P = I^2 R, so I = square root of (P / R) = square root of (100 / 50) = square root of 2 = 1.41 A. The 2 A answer would be right for a 25 ohm load, and would also be the supply current if the voltage were 50 V.
Rule Fundamentals - power law in the form P = I^2 R
Ohm's Law and Power: The Four Formulas Everything Else Rests On
Chapter completion
- T Radio and Signals Fundamentals Wavelength, frequency, bands, modulation and how a repeater hears you. 2/2
- T Electrical Principles and Components Ohm's law, power, AC/DC, resistors, capacitors, inductors and semiconductors. 2/2
- T Radio Wave Propagation Line of sight, terrain, multipath, and why 2 m dies at the far side of a hill. 0/1
- T Antennas and Feed Lines Dipoles, verticals, SWR, coax loss, baluns and the 468/f rule. 1/2
- T Station Setup and RF Safety Power supplies, bonding, feed line routing, MPE limits and RF burns. 0/1
- T Operating Practice Phonetics, Q signals, repeater etiquette, nets and emergency traffic. 0/1
- T FCC Rules for Technicians Part 97 in practice: identification, prohibited traffic, control operator duties. 1/2
- G HF Procedures and Band Plans Calling frequencies, split operation, contest vs. ragchew space, volunteer monitoring. 1/1
- G Circuits, Components and Measurements Resonance, transformers, filters, meters and practical troubleshooting. 2/2
- G HF Propagation and Space Weather F layers, MUF, sunspot numbers, geomagnetic storms and grey-line DX. 0/2
- G HF Antenna Systems Dipoles, verticals, beams, traps, tuners, ladder line and choking RF in the shack. 1/2
- G Signals, Modulation and Digital Modes SSB, FM, CW, PSK31, FT8, bandwidth, ALC and receiver performance. 1/2
- G Rules, Privileges and Third-Party Traffic Sub-band edges by class, reciprocal operation, third-party rules and antenna regulation. 0/1
- E Advanced Circuits and Devices Active devices, feedback, oscillators, mixers, phase noise and thermal design. 2/2
- E Signal Processing and Digital Communications Sampling, DSP filters, modulation theory, error correction and spread spectrum. 1/2
- E Advanced Propagation Ionospheric layers in detail, ducting, scatter modes, solar indices and HF forecasting. 1/2
- E Antenna Design and Transmission Lines Transmission line theory, matching networks, Smith chart reasoning and antenna modelling. 0/2
- E Regulatory, Space and Volunteer Examining International rules, space and repeater coordination, VE duties and spectrum defence. 1/2
Study path
Every published unit, newest last. Units appear here on their publication date, so a bookmark on this page grows with the site.
How to use this unit
Work the ten questions in one sitting with the reference sheet covered, then uncover it and read every explanation - including the ones you got right. The wording of the real exam is different, so learn the reasoning rather than the answer letters.
Informational study material only. Nothing here is a licence, a legal opinion or a substitute for the current FCC rules.