File:1920s TRF radio manufactured by Signal.jpg
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Original file (3,088 × 2,128 pixels, file size: 3.16 MB, MIME type: image/jpeg)
Summary
1920s TRF radio manufactured by Signal Electric MFG. CO. located in Menominee Mich. Demonstrates early radio construction methods using "breadboard"
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:54, 7 January 2017 | | 3,088 × 2,128 (3.16 MB) | 127.0.0.1 (talk) | 1920s TRF radio manufactured by Signal Electric MFG. CO. located in Menominee Mich. Demonstrates early radio construction methods using "breadboard" |
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