Hearing Aid J2
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| Year: 1954 ? | Category: Miscellaneous (Other, Various) - see notes | ||||
| Semiconductors (the count is only for transistors) | 1: |
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| Details | Hearing aid |
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| Power type and voltage | Dry Batteries |
| Loudspeaker | - only for Earphone! |
| Power out | |
| from Radiomuseum.org | Model: Hearing Aid J2 - Amplivox Ltd.; Kidlington |
| Notes | Hearing aid with transistor. Low-consumption valves are used in the voltage-amplifying stages, but the greater part of the normal h.t. current is saved by using the transistor. A reduction from 0.35 mA in the all-valve model J to 0.04 mA in the J2, or a ratio of 120/1000 hours life. A single Mallory mercury cell (1.3 V) is user for l.t. Here the economy is 20 mA to 12.5 mA, or 50 to 80 hours. Air-to-air gain is 47 dB with E9L high-sensitivity earphone, compared with 53 dB in the all-valve J hearing aid. |
| Price in first year of sale | 44.10 GBP |
| Mentioned in | Wireless World (The), London (WW, 79) (Vol. 60, March 1954, p. 149.) |
Model page created by Karl Dilcher. See "Data change" for further contributors.
All listed radios etc. from Amplivox Ltd.; Kidlington (Oxfordshire)
Here you find 2 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
