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3NP4_CRT

Information - Help 
ID = 25133
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Projection Television picture tube B/W 
Identical to 3NP4_CRT
Similar Tubes
Multiple differences or of other kind:
  MW6-2
First Source (s)
20.Mar.1948 : Electron Tube Registration List 642

Base Europe side contact, small P5 (Au V, 5E) Sidecontact.
Filament Vf 6.3 Volts / If 0.6 Ampere / Indirect
Description 2 1/2 inch magnetic deflection projection CRT. P4 phosphor aluminized. 24KV typ. accelerating voltage on A2, -35 to -84 typ. grid voltage. -175V to +10V max heater to catode.
Advertised in Electronics, October 1948, as the basic component of Norelco Protelgram television projector.
Unknown European code for this EIA/RMA registered type; probably the MW6-2.
This is a quite unique RMA registered tube with side contact European base. 
Dimensions (WHD)
incl. pins / tip
x 267 x 64 mm / x 10.51 x 2.52 inch
 
3np4.png
3NP4_CRT: Manufacturer's Literature
Emilio Ciardiello

 

from Just Qvigstad

Usage in Models 2= 1948? ; 2= 1950?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Documents about this component
  A very early ad of the Norelco (North American Philips) Protelgram television projection system can be found in the second cover of Electronics, October 1948. The 3NP4 CRT is evidenced by the smiling girl. 284 KB

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