6476 (Sylvania)
Dekatron counting tube

Bi-directional double-pulse decimal counting tube.
Neon filled.

The following pictures show the tube spinning.
Of course, only one of the cathodes is glowing, but the opening time of the camera leads to that different pictures:

a middle opening time of the camera:

a short opening time of the camera:

a long opening time of the camera:

by night, with  long opening time of the camera:

An animation of a spinning dekatron:

German English    
Röhrentyp Tube type   6476
Hersteller Brand   Sylvania
Vergleichstypen Substitutes   6476A, CK6476
Zähl-Richtung Counting direction   bidirectional
Arbeitsweise Operation   double pulse
Art Sort   SEL
Sockel Base   B12E
Fassung Socket   B12E
Nullposition Zero position   pin12
Zähl-Schritte Counting steps   10
Anzahl der Hilfskathoden Number of guides   2
Gasfüllung Gas filling   Neon
Röhrendurchmesser maximal Tube diameter max. mm 37,2364
Röhrenhöhe maximal Tube height max. mm 96,139
max. Zähl-Geschwindigkeit Max. counting speed kHz 4
Betriebsspannung minimal Supply volt. min. V 350
Betriebsspannung typisch Supply volt. typ. V 400
Brennspannung typisch Maintaining voltage typ. V 191
Anoden bzw. Kathodenstrom typ. Anode/cath. current typ. µA 445
Anoden bzw. Kathodenstrom max. Anode/cath. current max. µA 600
Anodenwiderstand typisch Anode resistor typical 470 (820)
Spannungsdifferenz zw. 2 Kath. max. Voltage between 2 cathodes max. V 140
Kathodenwiderstand typisch Cathode resistor typical 68 (100)
Ausgangsspannung Output voltage V 28 (30)
Anschlussbelegung: Pinout:    
PIN 01 PIN 01   K0
PIN 02 PIN 02   K9
PIN 03 PIN 03   K8
PIN 04 PIN 04   K7
PIN 05 PIN 05   K6
PIN 06 PIN 06   K5
PIN 07 PIN 07   K4
PIN 08 PIN 08   K3
PIN 09 PIN 09   K2
PIN 10 PIN 10   K1
PIN 11 PIN 11   G2
PIN 12 PIN 12   G1
Kappe in der Mitte center cap   A

Pinout & Outline:

Document #236: Sylvania Brochure "Counter Tube Handbook"
File: Sylvania_Counter_Tube_Handbook.pdf

Document #237: Sylvania Brochure "Decade Counter Tubes - Second Edition" - Dated 1959

Document #238: Sylvania datasheet: 6476 Dekatron tube

Document #155: Raytheon CK6476 Dekatron tube datasheet - Dated 1960
File: CK6476.pdf

Document #160: Raytheon Catalog SP-7649-360-20M - Dated 1961
File: Raytheon-cat01.pdf

Document #028: Ericsson book "Electronic Counting Circuits" - Dated 1967

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