Making a Crystal Radio - The Little Whippersnapper's Parts List

The Little Whippersnapper’s Radio requires the following widely available low-cost parts. I hope that the cost of the circuit will be within the range of the little whippersnapper's pocket money.

Hardware

• No. 6 Brass Screws ½-inch, quantity 16 from eBay
• No. 6 Brass Cups, quantity 16 from eBay
• Baseboard must be smooth softwood ½-inch thick, 4-inch wide and 12-inch long.

Germanium Diode

• OA90, Maplin Code: QH71N

Main Parts

• 365 pF Tuning Capacitor
• Crystal earpiece
• Ferrite Rod 3/8-inch diameter, 3-inch or longer
• 36 s.w.g enamelled copper wire / Radio coil wire
• Connecting copper wire

Tools

• Pointed nose pliers
• Screwdriver
• Gimlet / Bradawl for the guide holes
• Wire Cutter or Stripper
• Sandpaper for cleaning terminals
• Cutter pliers
• Dad / Mum / Adult Supervision

Modern Tools & Materials

• Glue Gun - Marksman
• Antex Vintage Soldering Iron SK1 Kit
• Omega: Rosin and Lead Free Solder

Optional - Not Required for the Crystal Radio

To make a science fair type electronics station the following additional components are required.

• 10 kΩ, Potentiometer Logarithmic, Maplin Code: JM77J
• R.F.C. Radio Frequency Choke 1 mH
• LT700 Audio Transformer
• 3-inch diameter Loudspeaker, 8 Ω
• Potentiometer Mounting Bracket
• PP3 Battery clip
• PP3 9 V Battery

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