Submerged repeater amplifier, 1967
1967
Submerged repeater for TAT-1, 1956
1956
Transistorized audio-frequency telephone line amplifier, 1954
1954
Transistorized audio-frequency telephone line amplifier, 1953
1953
Transistorized audio-frequency telephone amplifier, 1955
1955
two-wire telephone repeater, 1923-1925
1923-1925
Valve amplifier, by Shirley Laboratories Ltd, 1954-1960
1954-1960
Probably a battery powered amplifier
Third manufacturing stage of Amplifier for Lyman-alpha detector
Microphone Amplifier type OBA/8, 1939
circa 1939
BBC amplifier type IB/103 used for outside broadcast with new ribbon microphone. In case
1935
Leak "point one" sound pre-amplifier, 1956
1956
Home-constructed Williamson amplifier, c. 1949
circa 1949
Prototype Cox selenium-cell magnifier equipment, 1910-1920
1910-1920
Home-built amplifier
1965; 1965
BBC ERU/1 Equaliser and Repeater Unit. Transportable (mains only) line equaliser and repeater amplifier unit
BBC C/8 Amplifier
circa 1963
BBC C/3 Amplifier
BBC D/11 General Purpose Amplifier
circa 1943
BBC GPA/1A General Purpose Amplifier
Outside Broadcast Audio Amplifier
1936
Outside Broadcast Audio Amplifier
1900-1930
BBC OBA/8 Outside Broadcast Amplifier
1938
BBC OBA/9 Trap Valve Amplifier
1952
BBC OBA/9 Outside Broadcast Amplifier
1952
BBC 2CT/2 Loudspeaker Amplifier
BBC AM8/6 Loudspeaker Amplifier
1963
Marconi BD517C microphone and general purpose amplifier module
1961
BBC OBA/8 Microphone Amplifier & Programme meter
1938
BBC D/2 Amplifier
1931
BBC TSA/2 Tone Source Amplifier
circa 1931
amplifier
amplifier
amplifier
amplifier
Gaumont Kalee GK18 Amplifer
Amplifier and sound recorder
BBC AM7/3 Internal Send amplifier modules
1972
Gaumont Kalee GK18 Amplifer
Marshall JVM410H-H 100W guitar amplifier head and associated accessories
2017
Three-stage amplifier and equaliser
1931-1940
Multi-wavelength gain block erbium doped fibre amplifier, 1999
1999
Heurtley magnifier, 1919.
1919
Leak model TL/10 sound power amplifier, 1956
1956
Experimental, high-power, demountable Adler tube amplifier (tube only)
1960
Internal electrode structure from Adler tube low-noise amplifier
1960
Amplifier made by Trio, 1971
1970-1971
Tannoy Amplifier Type SPC/60H
amplifier
BBC OBA/7 Outside Broadcast Audio Amplifier
circa 1928