Accession No

4578

Brief Description

c. 234 x radio valves, plus lightbulbs, valve holders, and related papers, by Mullard; Marconi; Cossor; Osram; Brimar; Ever Ready; Radiotron; US Army US Navy; Triad; BBC; Raytheon; Triotron; Sylvania; Tungsram; Ericsson; Pliotron; Westinghouse; Dario, 32 without makers name, early 20th century

Origin

Maker

Mullard Marconi Cossor Osram Brimar Ever Ready Radiotron US Army US Navy Triad BBC Raytheon Triotron Sylvania Tungsram Ericsson Pliotron Westinghouse Dario

Class

electrical; sound

Earliest Date

1920

Latest Date

1940

Inscription Date

Material

metal; glass

Dimensions

2 boxes, each length 472mm; breadth 374mm; height 265mm

Special Collection

Provenance

Transferred from the Department of Physiology, University of Cambridge, on 23/01/1997.

Inscription

various, most have makers name and specifications

Description Notes

c. 234 x radio valves, by Mullard; Marconi; Cossor; Osram; Brimar; Ever Ready; Radiotron; US Army US Navy; Triad; BBC; Raytheon; Triotron; Sylvania; Tungsram; Ericsson; Pliotron; Westinghouse; Dario, 32 without makers name, early 20th century. Also 2/3 light bulbs by same makers, 9 valve holders and some related papers; mostly good condition, a few fair or poor.

Stored in two boxes - one contains valves in individual boxes, the other contains valves stored loose.

Valves with known maker’s name are marked with sub-accession numbers as follows:

4578.1 - Mullard: 39 loose, 23 boxed, 2 empty boxes
4578.2 - Marconi: 11 loose, 5 boxed, 1 empty boxes
4578.3 - Cossor: 11 loose, 5 boxed, 0 empty boxes
4578.4 - Osram: 11 loose, 3 boxed, 2 empty boxes
4578.5 - Brimar: 3 loose, 8 boxed, 2 empty boxes
4578.6 - Ever Ready: 4 loose, 1 boxed, 0 empty boxes
4578.7 - Radiotron: 7 loose, 0 boxed, 0 empty boxes
4578.8 - ??: 16 loose, 1 boxed, 0 empty boxes
4578.9 - US Army US Navy: 0 loose, 4 boxed, 0 empty boxes
4578.10 - Triad: 2 loose, 0 boxed, 0 empty boxes
4578.11 - Marconi; Osram; BBC (all 3 names on same valve): 3 loose, 0 boxed, 0 empty boxes
4578.12 - CV54: 5 loose, 0 boxed, 0 empty boxes
4578.13 - BBC: 3 loose, 0 boxed, 0 empty boxes
4578.14 - Raytheon: 1 loose, 0 boxed, 0 empty boxes
4578.15 - Triotron: 1 loose, 0 boxed, 0 empty boxes
4578.16 - NU18: 0 loose, 2 boxed, 0 empty boxes
4578.17 - Sylvania: 2 loose, 0 boxed, 0 empty boxes
4578.18 - Tungsram: 7 loose, 1 boxed, 0 empty boxes
4578.19 - Ericsson: 0 loose, 1 boxed, 0 empty boxes
4578.20 - Pliotron: 0 loose, 1 boxed, 0 empty boxes
4578.21 - Westinghouse: 1 loose, 0 boxed, 0 empty boxes
4578.22 - Dario: 1 loose, 0 boxed, 0 empty boxes
4578.23 - 6SF5: 3 loose, 0 boxed, 0 empty boxes
4578.24 - ??: 7 loose, 2 boxed, 0 empty boxes; valve holders

4578.25 - Assorted paper, including:
- Pages from the “RCA RADIOTRON MANUAL”
- Manual for RCA 884 gaseous-discharge tube
- Manuscript diagrams of amplifier circuits
- Typed pages with manuscript diagrams: “Suggestions for construction. Oscillator”
- Typed letter from a Dr. Ross (Department of Physiology, McGill University, Canada) dated 11/4/1940 to Dr. Edgar Douglas Adrian, concerning the use of valves in constructing a “noise-maker for brain waves”.
[NOTE: scans of all the print material (4578.25) are in the ‘high resolution object photography’ file in Bertrum]

References

Events