RCA type 5820 / C73438 image orthicon
date: label: date made
content: ca 1956
name: label: maker
content: RCA Corporation
notes: label: Description (Brief)
content: Museum staff noted: "A commercial image transmitting tube developed following experimental tubes of the early 1940s. The image orthicon is a television pickup tube incorporating the principles of low velocity electron beam scanning, electron image multiplication, and signal multiplication. It closely approaches the theoretical limit of pickups tube sensitivity, and can transmit pictures with a limiting resolution of over 500 lines if properly processed and is relatively free from spurious signals. At low lights, the signal output increases linearly with light input; at high light levels, the signal output is substantially independent of light input. The tube is completely stable at all light levels. The micromesh appears to be loose in this specimen."
label: Description (Brief)
content: A modified commercial type 5820 image orthicon (television pickup) tube with 14-pin plastic base, glass T-shaped envelope. Paper label:: "Form T 665 10-54 Eng. Loan / Developmental Type C73438 / High Sens. / Serial No. PP150-271 / Filters Off / This tube is supplied for Laboratory and / Experimental purposes only, with no / obligations as to its future manufac- / ture unless otherwise arranged / Radio Corporation of America / Tube Division / Lancaster, PA. / PWK / 3/5/57". Packed in original plastic sleeve.
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.322595
label: catalog number
content: 322595
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: television tube
label: Object Name
content: electron tube
label: Object Name
content: orthicon tube
label: Object Name
content: cathode ray tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 15 1/2 in x 3 1/16 in; 39.37 cm x 7.77875 cm