Mullard type PM-22-A pentode
name: label: maker
content: Mullard
notes: label: Description (Brief)
content: A five-pin plastic base, banana pins. Tipless domed envelope with internal getter stain. Stamped on envelope: “[logo] / Mullard / PM22A / Trade [??]Tone Mark / Made in / Great Britain.” Donor card reads: "Output pentode made by Mullard, Ltd. of England. An output pentode somewhat similar to Mullard's KL-35. Filament type 2 volts at .3 ampere. 135 volts on the plate and screen. 2.4 volt negative control grid bias, .3 watt maximum output." See also: Tyne, "Saga of the Vacuum Tube," page 377-379.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324485
label: catalog number
content: 324485
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: pentode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/4 in x 1 3/4 in; 10.795 cm x 4.445 cm