First valve amplifier set

Made:: 1923

This image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print

License this image for commercial use at Science and Society Picture Library

First valve amplifier set, assembled in suitcase, Marconi, 1923.
Science Museum Group
© The Board of Trustees of the Science Museum

First valve amplifier set, assembled in suitcase, Marconi, 1923.

This was the first aid employing valve amplification. It incorporated a normal 2-stage low frequency amplifier, run by a 66-volt radio high-tension battery and an accumulator. It has a magnetic microphone and a single magnetic earphone. It weighs about 11 pounds.

Details

Category:: Sound Reproduction

Object Number:: 1951-681

type:: valve

credit:: Hearing Aid Manufacturers Association

Cite this page

Rights

We encourage the use and reuse of our collection data.

Data in the title, made, maker and details fields are released under Creative Commons Zero . Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data

Download

Download catalogue entry as json

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.

First valve amplifier set

Details

Related Objects

Fidelity four-speed record player, c. 1960 (record player)

Technics SL-1210 Mk2 mode quartz synthesizer direct-drive turntable: one of two (synthesizer)

Bonochord Transitron transistor hearing aid case, c.1954 (case)

British Thomson-Houston Loudspeaker (loudspeaker)

Ferranti sound editing equipment (sound editing equipment)

Edison-type phonograph (phonograph)