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radioprep.co.uk
RadioPrep.co.uk
@radioprep.co.uk
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Online courses for the UK amateur radio licence exams (Foundation, Intermediate and Full). Video lessons, mock exams and study guides. One-off digital purchases with lifetime access.
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radioprep.co.uk
Worked calculation 🧮 (Full)

One cycle spans 4 divisions at 0.5 ms/div. Find the frequency.

Try it first, then check the working in the image.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Worked calculation: One cycle spans 4 divisions at 0.5 ms/div. Find the frequency. Given: Period = 4 × 0.5 ms = 2 ms. Working: f = 1 ÷ 0.002 Answer: 500 Hz.
October 12, 2026 at 6:02 PM
radioprep.co.uk
Vehicle batteries 📻

✓ Charge with plenty of ventilation
✓ Keep sparks away while charging
✓ Handle with care: the contents are corrosive
✕ Short the terminals: enough current to melt a spanner

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Vehicle batteries. Do: Charge with plenty of ventilation. Do: Keep sparks away while charging. Do: Handle with care: the contents are corrosive. Don't: Short the terminals: enough current to melt a spanner. Charging can give off explosive hydrogen gas.
October 12, 2026 at 11:02 AM
radioprep.co.uk
Question of the day 📻 (Full)

One cycle spans 5 divisions at 0.2 ms per division. What is the frequency?

A. 5 kHz
B. 200 Hz
C. 1 kHz
D. 10 kHz

The answer is upside down at the bottom of the image.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Question of the day 📻 (Full): One cycle spans 5 divisions at 0.2 ms per division. What is the frequency? A: 5 kHz. B: 200 Hz. C: 1 kHz. D: 10 kHz. Printed upside down at the bottom: Answer C, 1 kHz.
October 12, 2026 at 7:02 AM
radioprep.co.uk
Ready for Intermediate? The RadioPrep course covers the whole RSGB syllabus, updated for the 2024 licence: 23 video lessons, worked calculations and 5 full mock exams.

£49, lifetime access.

radioprep.co.uk/intermediate #HamRadio #AmateurRadio #hamr
RadioPrep: Step up to Intermediate: 100 W and more bands. 23 video lessons with worked calculations; 5 full mock exams in the RSGB format; Updated for the 2024 licence. £49, Lifetime access. Independent course, not affiliated with the RSGB or Ofcom.
October 11, 2026 at 6:02 PM
radioprep.co.uk
Did you know? 📻 Cut-off frequency

Where the response starts to fall away between passband and stopband.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Did you know? Cut-off frequency. Where the response starts to fall away between passband and stopband. From the lesson Filters: low pass, high pass, band pass and notch.
October 11, 2026 at 2:32 PM
radioprep.co.uk
Question of the day 📻 (Intermediate)

What is meant by the RMS value of an alternating voltage?

Options in the image, answer upside down at the bottom.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Question of the day 📻 (Intermediate): What is meant by the RMS value of an alternating voltage? A: The highest voltage reached during each cycle. B: The average of the peak value and zero volts. C: The voltage measured between two opposite peaks. D: The DC voltage giving the same heating effect. Printed upside down at the bottom: Answer D, The DC voltage giving the same heating effect.
October 11, 2026 at 7:02 AM
radioprep.co.uk
On air: try this weekend 📻

Compare signal reports on a low and a high antenna at the same site.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
On air: try this weekend 📻. Compare signal reports on a low and a high antenna at the same site. From the lesson Antennas: patterns, gain, EIRP, Yagis and traps.
October 10, 2026 at 6:02 PM
radioprep.co.uk
Did you know? 📻 Cores and slugs

High-permeability cores raise inductance; a movable ferrite slug adjusts it.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Did you know? Cores and slugs. High-permeability cores raise inductance; a movable ferrite slug adjusts it. From the lesson Capacitors and inductors: how they work and how they combine.
October 10, 2026 at 2:32 PM
radioprep.co.uk
Question of the day 📻 (Foundation)

Which transmission for general reception is allowed?

A. Playing music to listeners
B. A news bulletin for the public
C. Weather reports for local farmers
D. A CQ call

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Question of the day 📻 (Foundation): Which transmission for general reception is allowed? A: Playing music to listeners. B: A news bulletin for the public. C: Weather reports for local farmers. D: A CQ call. Printed upside down at the bottom: Answer D, A CQ call.
October 10, 2026 at 7:02 AM
radioprep.co.uk
Formula of the week 🧮 (Intermediate)

Resistors in series: RT = R1 + R2 + R3

Example: 100 + 220 + 330 = 650 Ω

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Formula of the week: Resistors in series. RT = R1 + R2 + R3. Rearranged: Same current through each. Example: 100 + 220 + 330 = 650 Ω.
October 9, 2026 at 6:02 PM
radioprep.co.uk
When to give your call sign 📻

✓ As often as practicable while you transmit
✓ Whenever you change frequency
✓ Whenever you change mode, including data modes
✓ Whenever the supervisor or locator changes

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
When to give your call sign. Do: As often as practicable while you transmit. Do: Whenever you change frequency. Do: Whenever you change mode, including data modes. Do: Whenever the supervisor or locator changes. Your station must be clearly identifiable at all times.
October 9, 2026 at 11:02 AM
radioprep.co.uk
Question of the day 📻 (Full)

What does ALC do?

A. Reduces drive before the amplifier overloads
B. Increases receiver gain automatically on weak signals
C. Tunes the antenna
D. Sets the receive volume

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Question of the day 📻 (Full): What does ALC do? A: Reduces drive before the amplifier overloads. B: Increases receiver gain automatically on weak signals. C: Tunes the antenna. D: Sets the receive volume. Printed upside down at the bottom: Answer A, Reduces drive before the amplifier overloads.
October 9, 2026 at 7:02 AM
radioprep.co.uk
Foundation, Intermediate or Full? Our free guide explains the three UK amateur radio exams: questions, time, pass marks and what each licence lets you do. 📻

radioprep.co.uk/exams #HamRadio #AmateurRadio #hamr
RadioPrep: The three UK amateur radio exams, explained. Foundation: 26 questions, 60 minutes; Intermediate: 46 questions, 1 h 30 min; Full: 58 questions, 2 hours. Independent course, not affiliated with the RSGB or Ofcom.
October 8, 2026 at 6:02 PM
radioprep.co.uk
Question of the day 📻 (Intermediate)

How can a digital copy of an analogue signal be made more accurate?

Options in the image, answer upside down at the bottom.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Question of the day 📻 (Intermediate): How can a digital copy of an analogue signal be made more accurate? A: Use fewer bits and a lower sampling rate. B: Sample less often to reduce the data. C: Sample at exactly the signal frequency. D: Use more bits and a higher sampling rate. Printed upside down at the bottom: Answer D, Use more bits and a higher sampling rate.
October 8, 2026 at 7:02 AM
radioprep.co.uk
Licence rule 📜 (Full licence)

Repeaters, beacons, data stations: Up to 25 W ERP with a call sign from the RSGB; above that, a notice of variation.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Licence rule, Full licence. Your licence: Repeaters, beacons, data stations. Up to 25 W ERP with a call sign from the RSGB; above that, a notice of variation. Summarised from Ofcom's licence conditions (Feb 2024) and guidance (Oct 2025). Check ofcom.org.uk for current versions.
October 7, 2026 at 6:02 PM
radioprep.co.uk
A safe station: tools, soldering, antennas, height, RF exposure and working outdoors, at a glance 📻

The lesson's summary on one page: save it for revision.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
At a glance: A safe station: tools, soldering, antennas, height, RF exposure and working outdoors. Hazard: Tools and swarf; Precaution: Eye protection. Hazard: Soldering; Precaution: Goggles, stand, ventilation. Hazard: Ladders; Precaution: 4:1, secured, don't overreach. Hazard: Falling objects; Precaution: Tool belt, hard hats. Hazard: RF; Precaution: Don't touch elements; avoid waveguides and high-gain beams. Hazard: Power lines; Precaution: Keep antennas and ladders well clear. Hazard: Outdoors; Precaution: Risk assessment, RCBO, protected cables.
October 7, 2026 at 11:02 AM
radioprep.co.uk
Question of the day 📻 (Foundation)

Where in most bands are CW and data found?

A. At the lower end
B. At the top end
C. In the middle
D. Anywhere

The answer is upside down at the bottom of the image.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Question of the day 📻 (Foundation): Where in most bands are CW and data found? A: At the lower end. B: At the top end. C: In the middle. D: Anywhere. Printed upside down at the bottom: Answer A, At the lower end.
October 7, 2026 at 7:02 AM
radioprep.co.uk
Flashcard 📻 (Intermediate)

3 dB: × 2 power.
Losses and gains add in dB.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Flashcard. Rule: 3 dB. × 2 power. Losses and gains add in dB.
October 6, 2026 at 6:02 PM
radioprep.co.uk
Question of the day 📻 (Full)

When may you assess using average power over six minutes?

A. At any power level, on any mode you choose
B. Only on FM
C. When the peak is no more than 100 W EIRP
D. Only above 1 kW

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Question of the day 📻 (Full): When may you assess using average power over six minutes? A: At any power level, on any mode you choose. B: Only on FM. C: When the peak is no more than 100 W EIRP. D: Only above 1 kW. Printed upside down at the bottom: Answer C, When the peak is no more than 100 W EIRP.
October 6, 2026 at 7:02 AM
radioprep.co.uk
Worked calculation 🧮 (Intermediate)

Find the frequency of a 70 cm (0.7 m) wavelength.

Try it first, then check the working in the image.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Worked calculation: Find the frequency of a 70 cm (0.7 m) wavelength. Given: λ = 0.7 m. Working: f = v ÷ λ f (MHz) = 300 ÷ 0.7 Answer: ≈ 429 MHz.
October 5, 2026 at 6:02 PM
radioprep.co.uk
Putting up an antenna safely 📻

✓ Ladder at four up for every one out
✓ Tied or held so it can't slip
✓ A helper, with an adult present
✓ Tools in a tool belt, hard hats at height
✕ Overreaching: move the ladder instead

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Putting up an antenna safely. Do: Set the ladder four up for every one out. Do: Tie it or have it held so it can't slip. Do: Have a helper, with at least one adult present. Do: Carry tools in a tool belt; hard hats when anyone works at height. Don't: Overreach: climb down and move the ladder instead. Overreaching is how people fall.
October 5, 2026 at 11:02 AM
radioprep.co.uk
Question of the day 📻 (Intermediate)

What defines the polarisation of a radio wave?

A. The plane of its magnetic field
B. Its frequency
C. The direction of travel
D. The plane of its electric field

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Question of the day 📻 (Intermediate): What defines the polarisation of a radio wave? A: The plane of its magnetic field. B: Its frequency. C: The direction of travel. D: The plane of its electric field. Printed upside down at the bottom: Answer D, The plane of its electric field.
October 5, 2026 at 7:02 AM
radioprep.co.uk
Starting out in amateur radio? The RadioPrep Foundation course covers the whole RSGB syllabus: 16 short video lessons, 5 full mock exams, flashcards and revision sheets.

£39, lifetime access.

radioprep.co.uk/foundation #HamRadio #AmateurRadio #hamr
RadioPrep: Get on the air: the Foundation course. 16 short video lessons; 5 full mock exams in the RSGB format; Flashcards and a revision sheet for every lesson. £39, Lifetime access. Independent course, not affiliated with the RSGB or Ofcom.
October 4, 2026 at 6:02 PM
radioprep.co.uk
Did you know? 📻 Stability

Rigid construction, screening, regulated supply, buffer amplifier. Drift can take you out of band.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio #hamr
Did you know? Stability. Rigid construction, screening, regulated supply, buffer amplifier. Drift can take you out of band. From the lesson Inside a transmitter: oscillators, stability, DDS and amplifier efficiency.
October 4, 2026 at 2:32 PM
radioprep.co.uk
Question of the day 📻 (Foundation)

How should you first test a new mobile installation?

Options in the image, answer upside down at the bottom.

Free lessons: radioprep.co.uk/free #HamRadio #AmateurRadio
Question of the day 📻 (Foundation): How should you first test a new mobile installation? A: While driving on a motorway. B: With the engine off and the vehicle's battery disconnected. C: Only on receive. D: With the vehicle stationary and all systems running. Printed upside down at the bottom: Answer D, With the vehicle stationary and all systems running.
October 4, 2026 at 7:02 AM