Making a Transistor Radio - Parts List

List

Of course, if you had a time machine, you could visit the Peter Vis Hardware Mercantile Store, and I will pack all of these items for you in a nice brown paper bag. The total charge would be a mere three pence (3d) in old money. There is the Olson's Store run by Nellie's dad, but they do not have the coils. Then there is Ike Godsey's store, which is the best as they also have a phone for making long-distance calls.

Hardware

  • No. 6 Brass Screws ½-inch, quantity 24
  • No. 6 Brass Cups, quantity 24
  • The baseboard must be planed softwood ½-inch thick, 4-inch wide and 12-inch long

Semiconductors

  • 2 × OA81, Germanium diodes
  • Equivalents: NTE109, IN34A, OA79, OA90, DZ280
  • 1 × OC45, Germanium PNP
  • 2 × OC71, Germanium PNP

OC71 Equivalents

According to my databook the following groups of transistors were considered equivalents used for the same purpose. Most of these are old, however worth checking out if they are going cheap on eBay.

General-purpose transistors used for audio frequency amplification were the following.

AC113, AC155, AC156, AC165, BCZ11, BSY95A, NKT213, NKT214, NKT215, NKT219, NKT223, NKT224, NKT225, NKT264, NKT272, OC70, OC71, OC73, OC75, OC78D, OC81D, OC81DM, OC82D, OC200, OC201, OC202, OC203, OC430, V6/4R, V6/8R, V10/15A, V10/30A, V10/50A, XB103, XB104, XB105, ZT23, ZT24, ZT697, 2N706A, 2N2926, 2S002, 2S004, 2S005, 2S321, 2S322, 2S323, 2S324

OC45 Equivalents

General-purpose transistors used for radio frequency amplification were the following.

ADT140, AF114, AF115, AF116, AF117, AF118, AF124, AF125, AF126, AF127, AF139, AF186, AFY19, AFZ11, AFZ12, AUY10, BSY53, BSY95A, MAT100, MAT101, MAT121, MAT120, NKT121, NKT124, NKT125, NKT126,NKT128, NKT141, NKT142, NKT162, NKT612, NKT613, NKT674, NKT675, NKT676, NKT677, OC41, OC42, OC43, OC44, OC45, OC139, OC140, OC141, OC169, OC170, OC171, V6/2R, XA101, XA102, XA111, XA112, XA151, ZT23, ZT24, ZT697, ZT706A, 2G301, 2G302, 2G303, 2G306, 2G371, 2G381, 2G382, 2G401, 2G402, 2G414, 2G415, 2G416, 2N410, 2N412, 2N428, 2N585, 2N697, 2N706A, 2N1091, 2N1302, 2N1613, 1N2926, 2S019

Non-Polarised Capacitors

  • 0.0005 µF / 500 pF Variable Capacitor
  • 10 pF Trimmer
  • 0.01 µF Ceramic Disc
  • 500 pF

Electrolytic Capacitors

  • 10 µF / 16 V
  • 10 µF / 16 V
  • 100 µF / 16 V

Resistors

  • 390 kΩ, ¼-watt
  • 4.7 kΩ, ¼-watt, 2 required
  • 150 kΩ, ¼-watt, 2 required
  • 1 kΩ, ¼-watt
  • 33 kΩ, ¼-watt
  • 10 kΩ Potentiometer

Inductors

  • R.F.C. Radio Frequency Choke
  • Eagle LT700 Audio Transformer

Miscellaneous

  • 3-inch diameter Loudspeaker, 3 Ω
  • Crystal earpiece
  • PP3 Battery clip
  • PP3 Battery
  • Ferrite Rod 3/8 inch diameter, 3-inch long
  • 36 s.w.g enamelled copper wire
  • Connecting copper wire
  • Knob for volume control
  • Knob for tuning control

Tools

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