| Country | Germany |
|---|---|
| Manufacturer | Aeriola Ges.m.b.H.; Berlin |
| Brand | Radio-Baby |
| Model | B21 - Aeriola Ges.m.b.H.; Berlin |
| Year: 1925 | Broadcast Receiver |
| Valves | 2: Triode Triode |
| Technology | TRF with regeneration; 1 AF stage(s) |
| Tuned Circuits | 1 AM circuit(s) |
| Wave Bands | Broadcast (MW) and Long Wave. |
| Power Type | Batteries |
| Dimensions | 240 x 210 x 160 mm / 9.4 x 8.3 x 6.3 inch |
| Net Weight | 2 kg / 4 lb 6.5 oz (4.405 lb) |
| Initial Price | 75.00 RM |
| Source | MyFile: Aeriola-B21-1925.jpg |
| Type | Configuration | Year | Base | Equivalents |
|---|---|---|---|---|
| TRIODE | Triode | B4 | ||
| TRIODE | Triode | B4 |