Crystal Radio Receiver Construction Set
Product Code : SCL-PL-12391
Crystal Radio Receiver Construction Set (SKU SCL-PL-12391) contains the parts to build a simple radio receiver: an antenna, a tuning circuit, a germanium detector diode, a filter and a piezoelectric earphone. Students assemble it to learn how a radio signal is selected and turned into sound. Science Lab Supplies manufactures the set at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and offers it to schools, colleges, training institutes, tender contractors and distributors.
Specifications
Tuning uses a 140 pF variable capacitor with a coil of about 300 µH, and a germanium detector diode recovers the audio from the modulated RF signal. The kit also includes a 1000 pF fixed capacitor, a filter, an antenna, the circuitry and a high-sensitivity 350 Ω piezoelectric earphone.
| Parameter | Value |
|---|---|
| SKU | SCL-PL-12391 |
| Variable capacitor | 140 pF |
| Fixed capacitor | 1000 pF |
| Detector diode | Germanium (1N34 type) |
| Coil | Inductance about 300 µH |
| Earphone | Piezoelectric, 350 Ω, high sensitivity |
| Other parts | Antenna, tuning circuit, filter, circuitry |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Crystal Radio Set
The set is used to build and test a working radio receiver, showing how an LC circuit selects one frequency, how a diode recovers the audio and how an earphone turns it into sound. It is a hands-on electricity and magnetism lab kit for schools, electronics clubs and ITI trainees.
- Class 12 physics: LC resonance and the semiconductor diode as a detector.
- Calculating the tuned frequency from the 300 µH coil and 140 pF capacitor.
- ITI electronics trades and STEM clubs: identifying components and assembling a receiver.
Keep any outdoor antenna wire well away from overhead power lines, and do not use it during thunderstorms.
Standard Scope of Supply
Each set supplies an antenna, a tuning circuit with the 140 pF variable capacitor and a coil of about 300 µH, a germanium diode, a 1000 pF fixed capacitor, a filter, a high-sensitivity 350 Ω piezoelectric earphone and the circuitry needed to assemble the receiver.
Packing, MOQ and Lead Time
One construction set, or one per student for a class project, can be quoted. Science Lab Supplies states packing, delivery time and price for the quantity requested, and other school physics lab equipment in India from the electricity range can be added to the same quotation.
Science Lab Supplies, which holds an Importer-Exporter Code, can ship to buyers in Uganda, the UAE, Saudi Arabia, Oman, the Philippines and Nepal. Send a message from the contact page, add sets to the enquiry cart, or see the lab tender page for tender work.
Frequently Asked Questions
What is included in the crystal radio set?
An antenna, a tuning circuit with a 140 pF variable capacitor and a coil of about 300 µH, a germanium diode, a 1000 pF fixed capacitor, a filter, a 350 Ω piezoelectric earphone and circuitry.
How does a crystal radio work?
The antenna picks up radio waves, the coil and variable capacitor tune one frequency, the germanium diode recovers the audio from the modulated signal, and the sensitive earphone turns it into sound.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies is the manufacturer. The construction set is prepared at the company’s own facility in Saha, Ambala, India, and schools, institutes and distributors receive quotations directly from there.
Which students is it suitable for?
It suits senior school students studying diodes and resonant circuits, electronics clubs and entry-level ITI electronics trainees, because it shows a complete receiver built from a small number of parts.
Related Electronics and Electricity Items
The four items below support the circuit work behind a crystal radio: capacitors for exploring tuning, leads for quick connections, an oscilloscope for viewing signal shape and a search coil for studying induced voltages. All four can be quoted with the construction set.
- Capacitor Set — capacitors from 0.22 µF to 1000 µF.
- Connecting Leads with Alligator Clips — 10 red and black leads.
- Oscilloscope — portable scope with a 320 × 240 colour display.
- Search Coil — 3300-turn coil for alternating magnetic fields.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
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