Image
Category
Maker
Object type
Place
Material
Date
Westalite contact cooled rectifier

Westalite contact cooled rectifier

Full wave mercury vapour rectifier, type 83

Full wave mercury vapour rectifier, type 83

Six Westinghouse copper oxide rectifiers

Six Westinghouse copper oxide rectifiers

Five selenium rectifiers

Five selenium rectifiers

1950

Four selenium low power rectifiers

Four selenium low power rectifiers

1942-1946

Ferranti Rectifier

Ferranti Rectifier

1940-1960

Mullard thermionic valve in box

Mullard thermionic valve in box

1945

Westinghouse 2X2 High-Voltage Rectifier

Westinghouse 2X2 High-Voltage Rectifier

Rectifier Unit by Heay Berd, Part of Wilkinson Race Finish Camera Unit

Rectifier Unit by Heay Berd, Part of Wilkinson Race Finish Camera Unit

"EDISWAN" Mercury-Vapour Rectifier

"EDISWAN" Mercury-Vapour Rectifier

1935

Three germanium rectifiers

Three germanium rectifiers

1957

Full wave rectifier, type 25Z6G

Full wave rectifier, type 25Z6G

Fifteen silicon rectifiers

Fifteen silicon rectifiers

Hytron mercury vapour half wave rectifier

Hytron mercury vapour half wave rectifier

National Union full wave vacuum rectifier

National Union full wave vacuum rectifier

Experimental X-Band vacuum-diode waveguide rectifier

Experimental X-Band vacuum-diode waveguide rectifier

1953

Experimental Q-Band vacuum-diode waveguide rectifier

Experimental Q-Band vacuum-diode waveguide rectifier

1950-1953

E.H.T. rectifier

E.H.T. rectifier

1940-1959

Klangfilm' Rectifier

Klangfilm' Rectifier

Wild E2 rectifier, for aerial photogrammetry

Wild E2 rectifier, for aerial photogrammetry

1952

Forced air-cooled high voltage rectifier

Forced air-cooled high voltage rectifier

Ferranti Rectifier

Ferranti Rectifier

1930-1950

Rectifier, part of continuously-pumped 250KV deep x-ray therapy equipment

Rectifier, part of continuously-pumped 250KV deep x-ray therapy equipment

1938

Wild E2 rectifier, for aerial photogrammetry

Wild E2 rectifier, for aerial photogrammetry

1952

Three silicon controlled rectifiers

Three silicon controlled rectifiers

1960

Tekade full wave rectifier, type RG12D60

Tekade full wave rectifier, type RG12D60

E.H.T. rectifier

E.H.T. rectifier

1940-1959

E.H.T. rectifier

E.H.T. rectifier

1940-1959

E.H.T. Rectifier type 68508

E.H.T. Rectifier type 68508

1940-1957

E.H.T. rectifier

E.H.T. rectifier

1940-1959

Sylvania full wave rectifier, type 6X5GT/T

Sylvania full wave rectifier, type 6X5GT/T

E.H.T. rectifier

E.H.T. rectifier

1940-1959

E.H.T. rectifier

E.H.T. rectifier

1940-1948

E.H.T. rectifier

E.H.T. rectifier

1940-1959

E.H.T. rectifier

E.H.T. rectifier

1940-1948

E.H.T. rectifier

E.H.T. rectifier

1940-1959

Westalite rectifier made by Westinghouse Brake and Signal Co. Ltd., London, Serial No. SD15857.

Westalite rectifier made by Westinghouse Brake and Signal Co. Ltd.

Two selenium high voltage rectifiers: 1945 British 16 H.T.80; 1948 British 36 H.T.40

Two selenium high voltage rectifiers

1945-1948

Westinghouse metal rectifier (pre 1939)

Westinghouse metal rectifier

AC rectifier, c. 1925, Fellows Wireless.

AC rectifier

Mercury rectifier with "Vitreosil" transparent fused silica envelope

Mercury rectifier

Two copper oxide high voltage rectifiers: 1934 British H 176 (2 units); 1935 British J 176

Two copper oxide high voltage rectifiers

1934-1935

Wild E2 rectifier, for aerial photogrammetry, circa 1952

Wild E2 rectifier

1952

Mercury vapour rectifier.

Mercury vapour rectifier

Westinghouse metal rectifier.

Westinghouse metal rectifier

Rectifier, cased

Rectifier, cased

Sen Ter Cet rectifier (STC)

Sen Ter Cet rectifier (STC)

Hg vapour rectifier, 1 phase VU72 from National Valve Museum: The VU72 was the pre-CV RAF code for the commercial mercury vapour rectifier type GU50. The latter exhibit has a clearer glass envelope and so the internal structure is easier to see. The maximum reservoir capacitor is 4 µF. The filament is a twin horseshoe of corrugated tape. The anode is a short dustbin lid connected to, and supported by the top cap.

Vapour rectifier

1940s

Ostar-Ganz rectifier triode valve. U920 from National Valve Museum: The U920 is an output triode. Ostar Ganz made a range of valves with a mains heater. The base pins are of simple split construction.

Ostar-Ganz rectifier

1930s-1940s

Ostar-Ganz rectifier FD14; EG100

Ostar-Ganz rectifier

1930s