| Midwest 9-31 ;4SG (Gernsback : Radio 7 P: 1595) |
| £1.80 (~ $2.20 or €2.10) |
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| Country | USA |
|---|---|
| Manufacturer | Midwest Radio Co., The, (Miraco); Cincinnati, OH |
| Brand | Miraco |
| Model | Model 9-31 [4SG] - Midwest Radio Co., The, Miraco |
| Year: 1931 | Category: Broadcast Receiver |
| Valves | 9: 24 24 24 24 27 27 45 45 80 |
| Technology | TRF without regeneration |
| Tuned Circuits | 4 AM circuit(s) |
| Wave Bands | Broadcast only (MW). |
| Power type | AC |
| Source | Book: rider Vol: 8 Page: 24&32 |
| Source | Book: rider Vol: 9 Page: 9 |
| Source | Book: gernsback Vol: 7 Page: 1595 |