- 1
Remove the screws in the back panel.a screwdriver image by alri from Fotolia.com
Remove the back panel of the radio. Most antique radios have a fiberboard back panel, held on with screws. Remove the screws with a screwdriver and pull the panel off. - 2
Use a flashlight to get a good view inside the radio.flashlight image by Sonar from Fotolia.com
Look inside at the speaker. If necessary, use a flashlight to get a good view. - 3
Write down the name of the manufacturer.person writing image by Tammy Mobley from Fotolia.com
Note the name of the manufacturer printed on the magnet of the speaker -- the magnet is the round object on the back of the speaker basket. Write this down. - 4). Look for any electrical specifications, such as wattage or ohm ratings. Write this information down.
- 5
Measure across the face of the speaker.Glass with measuring tape. image by mashe from Fotolia.com
Measure the diameter of the speaker, from one edge to another, with a measuring tape. - 6
Take a photo of the speaker.man taking a picture image by Leticia Wilson from Fotolia.com
Take a photograph of the speaker with a camera.
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