| Country | USA |
|---|---|
| Manufacturer | Federated Purchaser, Inc. (Acratone, Acratest); New York City (NY) |
| Model | Acratest - Acratone 47Federated Purchaser, Inc. |
| Year: 1934 | Category: Audio Amplifier |
| Valves | 4: 6A6 6A6 6B5 6B5 |
| Technology | Audio-Amplification |
| Power type | Storage Battery for all (e.g. for car radios and amateur radios) / 6 Volt |
| Dimensions | 10 x 5.5 x 8 inch / 254 x 140 x 203 mm |
| Net weight | 20 lb (20 lb 0 oz) / 9.080 kg |
| Initial Price | 49.50 USD |
| Notes | Mobile PA amplifier (for mike and phono input) Made for mounting in an automobile or sound truck.
It had a remote steering column control. Overall voltage gain of 80db; frequency response of 40 to 10,000 cps; input impedances of 200 and 500 ohms; and output impedances of 2, 3, 4, 6, 7, 8, 10, 12, 13, 15, and 500 ohms. |
| Source | Book: Rider Vol: 7 Page: 3 |