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ID = 25209
Tube type:  Orthicon 
Identical to 5820
Similar Tubes
Other class quality (otherwise equal):
Other characteristic (electr. data):
  6474 ; 7294
First Source (s)
18.Jul.1949 : Electron Tube Registration List 767

Base Diheptal (14 pin glass U14) Side contacts.
Filament Vf 6.3 Volts / If 0.6 Ampere / Indirect / Specified voltage AC/DC
Description 3" image orthicon for outdoors use; 1650V anode voltage.
English Electric, GE, Philips, RCA, Sylvania, Westinghouse known manufacturers.

English Electric Valve Co literature notes that this was the first Orthicon manufactured by the Company. It is stated that acceptable pictures can be obtained at f5.6 with a scene brightness of 15ft-lamberts (= 50 cd/m2), making it suitable for outside or studio use. 

Dimensions (WHD)
incl. pins / tip
78 x 393 x mm / 3.07 x 15.47 x inch
Information source - - Manufacturers Literature   EE Brochure 1962
Tube Lore (I)   

5820: my collection
Giuseppe Antonio Tusini
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5820_spinotti.png 5820: my collection
Giuseppe Antonio Tusini

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5820: my collection
Giuseppe Antonio Tusini

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Usage in Models 1= 1952

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of



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