Mullard type HF radio valve
date: label: date made
content: ca 1924
name: label: maker
content: Moorhead Laboratories
label: maker
content: Mullard
notes: label: Description (Brief)
content: A British triode in original box. Plastic four-pin base with brass pins and plastic collar. "Mullard" and "G" molded on top of collar. Molded on base: "REGD.No. / 707380". Tipped glass envelope. Stamped on one Side: "BBC" and "K174"? Stamped on other side: "H F / Trade Mark / Radio Mullard Valve / Protected By Patent". Thin red stripe on the glass circles the maximum diameter. Box reads: "Mullard H.F Valve / For use in the first stages of any radio receiver as H.F. amplifier or detector on all broadcast wavelengths. / Manufactured by The Mullard Radio Valve Co., Ltd. / Nightingale Land, S.W.12." Also: "Filament Voltage 3.2 - 3.8 Volts / Filament Current 0.6 Amps / Anode voltage 30 - 90 Volts." Reference: Tyne, "Saga of the Vacuum Tube," page 378.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320990
label: catalog number
content: 320990
label: accession number
content: 241556
objectType: label: Object Name
content: triode
label: Object Name
content: vacuum tube
physicalDescription: label: Physical Description
content: cardboard (box material)
label: Measurements
content: tube: 4 in x 1 1/2 in; 10.16 cm x 3.81 cm
label: Measurements
content: box: 5 1/8 in x 2 3/8 in x 2 1/2 in; 13.0175 cm x 6.0325 cm x 6.35 cm