| Country | Canada |
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| Manufacturer | Addison Industries, Ltd.;Toronto |
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| Model | 21 Addison Industries, Ltd.; |
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| Year: 1947 | Broadcast Receiver |
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| Valves | 5: 12SA7 12SK7 12SQ7 50L6GT 35Z5GT |
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| Technology | IF 456 kHz |
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| Wave Bands | Broadcast only (MW). |
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| Power Type | AC/DC-set / DC or AC 25-60 cycles 110 - 120 Volt |
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| Dimensions | 360 x 227 x 180 mm / 14.2 x 8.9 x 7.1 inch |
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| Notes | The Canadian Addison model 21 for AC/DC and 25 / 60 cycles 110 - 120 Volts consumes 30 Watts. It has the CSA approval # 3978. |
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| Source | MyFile: Addison-21_36-1947.Radio.pdf |
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| Source | MyFile: Addison-21.Radio.jpg |
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