Transistorized audio-frequency telephone line amplifier, 1954
This image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseTransistorized audio-frequency telephone line amplifier
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Transistorized audio-frequency telephone line amplifier
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Transistorized audio-frequency telephone line amplifier, probably designed and made at the Post Office Research Centre at Dollis Hill, London, England, 1954.
Very soon after the development of successful transistors in 1947, the Post Office Research Station at Dollis Hill, London, were working on their use in telephone repeaters (amplifiers). This is a single transistor amplifier with a diode in order to protect the transistor against electronic surges. Seventeen of these were constructed in the latter part of 1954 and were put on field trial.
Details
- Category:
- Telecommunications
- Object Number:
- 1971-439
- Materials:
- metal (unknown)
- Measurements:
-
overall: 146 mm x 83 mm x 60 mm, .56kg
- type:
- amplifier
- credit:
- Donated by BT Heritage and Archives
