Characteristics of Electron tube

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Getter Types

D-getter



DD-getter



D flat cross bar



D near ring



 ring getter O (halo getter)



 double ring OO



double stage



square getter



 disc getter



closed getter



 long getter arm

 

double arm

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Plate Types

 Smooth Plate



 ribbed plate



 crimped plate



 folded plate



 plate side hole



 long plate



 short plate



 ribbed p. side

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Other

<>between pins



pinched waist หลอดที่เกิดจากความผิดพลาดจากการผลิตกลายเป็นหลอดพิเศษไปซะงั้น 





pinched base



hole in guide pin



big base



metal base



coin base



code between pin



 code on getter arm





ref : http://www.tube-classics.de

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 The most important factories/plants for Philips audio tubes:
                                                                               

Δ    Heerlen, Holland

D    Hamburg, West Germany

B    Blackburn, England (GB)

L    Brussels, Belgium

1 2 3 6 9 Eindhoven, Holland

≠    Munich, Germany Siemens & Halske

X Y Sittard, Holland





 Example: I66 Δ0K4
   I6 = ECC83
   I66 = ECC83 of construction #6
   Δ = Made in Heerlen/Holland
   0K4 = Made 1970  in  November  K   4th week

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Label Colors



Red label : These tubes were designed for use in industrial controlling 
characteristics ; long life, high reliability, high tolerances, high shock and vibration resistance, special cathodes




Yellow Label : These tubes were designed for use in long distance transmission
characteristics ; long life, high reliability, high tolerances, 



Green Label : These tubes were designed for use in calculators
characteristics ; long life, high reliability, high tolerances in significant curve points, special cathodes



Blue Label : These tubes were designed for use in aviation
characteristics ;  high reliability, high tolerances, high shock and vibration resistance, special filaments for switching