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McVitie Weston valve collection, Marconi WT Co Round valve, type T

circa 1914

McVitie Weston valve collection, Marconi WT Co Round valve, type T

1917

McVitie Weston valve collection, Marconi WT Co Round valve, type V24

1916

McVitie Weston valve collection, Marconi WT Co valve, type V24

circa 1919

McVitie Weston valve collection, Marconi WT Co Round valve, type V.24

1919

McVitie Weston valve collection, Marconi WT Co Round valve, type V.24

1916

McVitie Weston valve collection, Marconi WT Co Catkin valve, type MPT4

1935

Radio broadcast receiver, c.1925

circa 1925

Wade Bequest collection of valves: Marconiphone radio valve

McVitie Weston valve collection, Marconi WT Co valve, type M.T.1

1919

McVitie Weston valve collection, Marconi WT Co., round valve, type N

circa 1913

Model Disc Discharger, Marconi Company Souvenir, 1912

1912

Moorside Edge Transmitter Voltage and Current Meters

1931

McVitie Weston valve collection, Marconi WT Co valve, type HL2

1932

McVitie Weston valve collection, Marconi WT Co valve, type TT11

McVitie Weston valve collection, Marconi WT Co Round valve, type V.24

1919

McVitie Weston valve collection, Marconi WT Co valve, type E.44A.

McVitie Weston valve collection, Marconi WT Co valve, type E27

McVitie Weston valve collection, Marconi WT Co Catkin valve, type MPT4

1935

McVitie Weston valve collection, Marconi WT Co valve, type HL2

1932

McVitie Weston valve collection, Marconi WT Co Round valve, type Q

Marconi magnetic wireless detector

1903-1907

Presentation case for model of Marconi's disc discharger [spark regulating device]

1912

McVitie Weston valve collection, Marconi WT Co valve, type 5RR1L.F.(A)

McVitie Weston valve collection, Marconi WT Co Round valve, type DEQ

McVitie Weston valve collection, Marconi WT Co Round valve, type V24

McVitie Weston valve collection, Marconi WT Co Round valve, type V24

McVitie Weston valve collection, Marconi WT Co., round valve, type N

circa 1913

Marconi magnetic detector No. 12739 with cover, 1900-1950

1900-1920

Marconi-Sykes Magnetophone microphone

1923

Moorside Edge Transmitter Tuning Coil

1931

Marconi Type HR11 Telegraph Receiving Equipment, c. 1960

1960

Marconi - BBC Ribbon Microphone

circa 1940
Marconi High Frequency telegraphy/telephony Transmitter Type SWB8E, c. 1935, used at the Cable & Wireless Ltd Engineering Training College, at Porthcurno, Cornwall.

Marconi High Frequency telegraphy/telephony Transmitter Type SWB8E

circa 1935
2 Marconi WT Co. valve, type Q, (RMW/B97A - McVitie Weston number), by Marconi Wireless Telegraph Company Limited.

McVitie Weston valve collection, Marconi WT Co Round valve, type Q

Electro-dynamic microphone, by H. J. Round, Marconi Wireless Telegraph Company, 1922-1923.

Round Electro-Dynamic Microphone

1922-1923
Marconi WT Co. valve, type V.24, marked 4137, (RMW/B102* - McVitie Weston number), by Marconi Wireless Telegraph Company Limited.

McVitie Weston valve collection, Marconi WT Co Round valve, type V.24

Vestigial-sideband filter Type BD 775D made by Marconi's Wireless Telegraph Company Limited, Chelmsford, 1955. This filter formed part of the Independent Television Authority's [ITA] first transmitter at Croydon. In order to accommodation as many televisions transmissions as possible in the available wavebands, some of the 'sideband' frequencies produced by the modulation process are surpressed at the transmitter; the transmission comprises all sideband frequencies lying to one side of the carrier frequency, but only a narrow 'vestige' of those to the other side. The unwanted frequencies are reduced in level by appropriate tuning of the transmitter circuits, but to attain the high defree of suppression necessary to prevent interference with other channels, a unti such as that exhibited is employed.

Vestigial-sideband filter, from Croydon Transmitting Station, 1955

1955