By Nicky Godoff

1
Radio VS. CRYSTAL RADIO

• By Nicky Godoff
• 6th Grade
• 2nd Quarter
• Robert Louis Stevonson
• Middle School

2
INTRODUCTION

• Controlled variables-the same place my backyard.
• Experimental variables-Using a crystal radio and
  a regular radio.

3
Backgroground research

• Radio Frequency Identification- finding how many
  radio waves are being detected in the area.
• Crystal Radio- A radio that usually uses a
  crystal rod antenna.

4
Question and Hypothesis

• Question- Can a crystal radio pickup more radio
  stations than a regular radio?
• Hypothesis- If a crystal radio picks up more
  radio stations, then this proves that a crystal
  radio can pick up more radio stations.
• I think that the crystal radio can pick up more
  radio stations because the antenna is longer than
  the regular radio antenna.

5
Materials

• 7dk of 40cm of spooled wire.
• 2 ½ cm 34 Diode.
• 1 47k watt resistor.
• 1 hi impedance ceramic speaker
• 1 wood board.
• 1 regular radio.

6
Procedure

• Get materials.
• Build crystal radio.
• Set up the observation table.
• Get both radios set up outside. Test hypothesis
  on two different days.
• Draw conclusion.

7
Observation Table
Dates Crystal Radio Regular Radio
11/25 Has less radio stations. Has twice as much radio stations.
11/27 It picked up more stations. It still had more radio stations.
8
Crystal Radio VS. Regular Radio
The graph shows how much radio stations are being
detected.
9
Data Analysis

• In my experiment the crystal radio did not pick
  up as much radio stations as the regular radio.
• The crystal radio picked up less radio stations,
  the radio had at least twice as much more radio
  stations.
• The results werent much different on the trails.

10

Conclusion

• My hypothesis was incorrect, the crystal radio
  only picked up 34-38 radio stations. The regular
  radio picked up 72-79 radio stations.
• If I would do the project again I would have
  built the crystal radio better and have a longer
  antenna.
• I recommend this project to people that have a
  lot of time, because the crystal radio is hard to
  build.

11
Works Cited Thanks

• Matolak, David W. Radio Frequency Identification
  .World Book, 2010. Web. 2 Nov. 2010.
• Halper, Donna L., David W. Matolak. Radio.
  World Book, 2010. web. 2 Nov. 2010.
• Special thanks to my dad for getting the
  materials and helping me with the project Also to
  Mr. Pham!!!!