Crystal Radio
stay tuned crystal radio and tube radio website
crystal set



Build A Crystal Radio
for the "Beginner"

Radio #2



New!
Photos of completed radio at the bottom of this page.




You will need the following items

1   Quaker Oats box (4" Diameter size)

1   Mounting Board (Wood)

1   100 foot spool of #24 or #22 solid plastic insulated wire 
      Suppliers:
      Ocean State Electronics   Part No. HWS24BK-100
      Radio Shack    278-1224  (also in store)

1   Germanium Diode 1n34, 1n34a, 1n60 etc.
      Suppliers:
      Ocean State Electronics   Part No. 1N34A
      Antiques Electronic Supplies   P-Q972 
      Dan's Small Parts and Kits
      Computer Controlled Automation

1   47K resistor 1/4 or 1/2 watt
      Suppliers:
      Ocean State Electronics   Part No. RQ47K
      Antiques Electronic Supplies   R-A47K
      Radio Shack    271-1342  (also in store)
      Dan's Small Parts and Kits

1   alligator clip
     Suppliers:
      Ocean State Electronics   Part No. 269B
      Antiques Electronic Supplies   S-H301-103

1   Ceramic Hi Impedance Earphone
     Suppliers:
     (Please remember: A earphone or headphones or "ear buds" from Radio Shack
      etc will not work.  They must be Ceramic "HI Impedance" earphone. NOT the
      kind used on transistor radios)

      Ocean State Electronics   Part No. CE748
      Antiques Electronic Supplies   P-A480
      Computer Controlled Automation

4   Fahnestock Clips (You could use a machine screw up through the bottom of the board
     and a nut. Then a knurled nut or another nut to tighten the wires down.
      Suppliers:
      Ocean State Electronics   Part No. 2090
      Antiques Electronic Supplies   S-H11-4034
 
1    365 pf Air Variable Capacitor
     
Ocean State Electronics   Part # BC14400
     
Antiques Electronic Supplies    Parts # C-V365
    

     

All the parts can be purchased at Ocean State Electronics



Construction

Take the Quaker Oats container (empty of coarse) and on the open side, come down about a 1/2" and poke two holes (careful). Poke the wire through the right hole and back through the second hole like shown below at the top. Pull about a foot of wire out. On the inside of the oats box, place a piece of tape on the wire and the two holes. This will keep the wire from slipping out.

Wrap 10 turns of wire around the oats box. Poke two holes next to the last turn of wire. Cut the wire off the spool of extra wire about a foot long. Poke the wire into the first hole and back out the second hole. Place a piece of tape on the inside like on the top. This will keep the wire tight on the oats box.

Wrap 10 turns of wire around the oats box and make a "tap". See the illustration below on how to make a tap. Twist the wire a couple of times and remove the insulation at the twist (see below). Continue making wraps and about every 10 turns make a tap until you get to 45 turns.

At 45 turns, poke two holes next to the last turn of wire. Cut the wire off the spool of extra wire about a foot long. Poke the wire into the first hole and back out the second hole. Place a piece of tape on the inside like on the top. This will keep the wire tight on the oats box.

You now have your coil wound like in the illustration below






    
The rest is just assembly and wiring to look like the illustration below.

Click Here to see how to wire the variable capacitor and some tips

You will also need an antenna and ground
The antenna can be any wire covered or bare, as high and long as possible. Make sure you don't get around electrical wires for your safety and the performance of the radio.  Also don't let the antenna "ground out" to trees or the earth (ground). You can make insulator (see below) from plastic water pipe or couplings.

Please don't leave this antenna up during lightning storms!

 

 crystalradio simple antenna

The ground can be made by connecting to a water pipe, or to a rod pounded into the ground.

Hook it all up and put the alligator clip somewhere in the middle. You should hear something!
 


 

oatbox crystal radio

Here is the same radio but with a "catswisker" or Crystal Detector
You replace the diode with a "catswisker"

 
 




If you have problems with your set when it is done,
please try the "Troubles" page by Clicking Here



Have Some Photos Of Your Set You built?
Please send them in so others can see it can be done!
Email address is at the bottom of the page.
Don't have a digital camera or scanner, email me and I can do that for you.






















Crystal Radio
Return to "Stay Tuned " Home Page


© 1999-2010  Darryl Boyd,  All rights reserved
Copyright Notice:
My website is copyrighted. This includes all images, text, drawings.
If you are thinking of downloading my copyrighted items and selling them on ebay (or anywhere) keep this in mind,
I monitor ebay for such violations.  I will pursue the issue with ebay and in the courts if necessary.
I do not furnish them for  your gain from my hard work.





Search This Site
 
Google

WWW http://www.crystalradio.net 



Send Email To:
d b d c s t d i n t
Because of antispam techniques, you can not "cut and paste" the above text

Return to "Stay Tuned " Home Page


We have made every effort to ensure that the information provided on this website is accurate and up to date.
All information on this website is informational only and no
guarantees to the accuracy of any of the projects
or circuits on this site or calculators. If you find something you feel is inaccurate, please inform us by e-mail. Be sure to provide a thorough argument to support your case. Confirmed changes will be made as quickly as possible.

The images on this website  are protected by copyright.  They are the property of the owner of this website and may not be used without the owners permission. Please don't use the images made by us on this website without permission.