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6T8

Information - Help 
ID = 3910
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Triple Diode-Triode 
Identical to 6T8 = 6TD34 = 6TD32
Similar Tubes
Normally replaceable-slightly different:
  6AK8 ; EABC80
Heater different:
  19T8 ; 5T8 ; 6T8A ; 9T8
Different connections:
  6V8
First year 1948 Photofact Folder, Howard W. SAMS Date 12-48, Set 52, Folder 5 for 9-202M Crosley
First Source (s)
20.May.1947 : Electron Tube Registration List
Predecessor Tubes 6S8GT  
Successor Tubes 1952   EABC80   6AK8  
Base Noval, 9 pin miniature (USA pico-9) B9A (Codex=No 16)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.45 Ampere / Indirect / Specified voltage AC/DC
Description

The difference between EABC80 / 6AK8, both from 1952, and 6T8: The EABC80 / 6AK8 has a better shielding between heater and the other electrodes, particularly to the triode control grid, in order to suppress hum. Otherwise, they are interchangeable with each other.

Just Qvigstad: Since the RCA Tube Reference Book is a calendar book with one page for each week of the year, the 1949 edition must have already been printed and in sale in the latter part of the year before (1948). In addition to the notebook for all days of the year, it contains a list of RCAs' tubes with socket connections, US broadcast stations, maps, and other technical data. According to “Tube Lore” page 28 was the final registration for 6T8 May 20th, 1947. The tube can therefore have been on the market or for development of new radios in the second half of 1947.

 
Text in other languages (may differ)
Tube prices 2 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
Tube Tester Data Avo CT160
6t8.png
6T8: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector
eabc80~~7.png 6T8: Telefunken Röhrenhandbuch
Wolfgang Bauer
More ...
Just Qvigstad 		view~~1.png
6T8: 6AK8
Júlio Branco
More ...
Usage in Models 2= 1948?? ; 11= 1948? ; 20= 1948 ; 62= 1949? ; 42= 1949 ; 14= 1950?? ; 182= 1950? ; 31= 1950 ; 1= 1951?? ; 483= 1951? ; 42= 1951 ; 12= 1952?? ; 355= 1952? ; 10= 1952 ; 150= 1953? ; 121= 1953 ; 5= 1954?? ; 6= 1954? ; 15= 1954 ; 12= 1955?? ; 123= 1955? ; 43= 1955 ; 1= 1956?? ; 866= 1956? ; 67= 1956 ; 2= 1957?? ; 485= 1957? ; 18= 1957 ; 15= 1958?? ; 158= 1958? ; 190= 1958 ; 2= 1959?? ; 23= 1959? ; 15= 1959 ; 19= 1960?? ; 2= 1960? ; 7= 1960 ; 1= 1961?? ; 2= 1961? ; 2= 1961 ; 9= 1962?? ; 2= 1962? ; 2= 1962 ; 2= 1963?? ; 1= 1963? ; 5= 1963 ; 1= 1964?? ; 1= 1964 ; 6= 1965? ; 2= 1966?? ; 1= 1967?? ; 1= 1969?? ; 1= 1970?? ; 3= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3654

Collection of

David Erali (USA)
Shaun Merrigan (CDN)
George Papaiz (CDN)
Michael Gnaedig-Fischer (MEX)
Christian Schaufelberger (CH)
Massimo Pedrina (I)
Marcello Astolfi (I)
Georges Werts (B)
Antonio Rabitti (BR)
Collection of a member from FIN
Collection of a member from FIN
Danko Tkalec (HR)
Tomasz Szczesniak (PL)
Collection of a member from D
Ottmar Rollmann (D)
Jacob Roschy (D)
 
6t8_30rm463b.jpg

6T8
 
Forum contributions about this tube
6T8
Threads: 3 | Posts: 6
Hits: 4922     Replies: 0
6T8 - EABC80 - 6AK8
Heribert Jung
28.Nov.12 		  1
6T8 - EABC80 - 6AK8 

Hans M. Knoll schreibt in Rundfunk und Museum, der Zeitschrift des Rundfunkmuseums der Stadt Fürth, in Heft 81, August 2012 im Beitrag "Die Lorenz-Miniatur-Röhren der Jahre 1950/55" folgendes:

 
Hits: 4676     Replies: 0
6T8 (6T8)
Jacob Roschy
14.Sep.07 		  1
6T8 (6T8) 

EABC80 / 6AK8 und 6T8: Unterschied

Die EABC80 / 6AK8 hat eine bessere Abschirmung zwischen Heizfaden und den anderen Elektroden, besonders zum Steuergitter der Triode, zur Unterdrückung von Brumm.

Dazu werden bei der EABC80 die Katoden von Foben   Hgeheizt und die Röhre ist dadurch  höher. Ansonsten sind EABC80 und 6T8 gegenseitig austauschbar.

 
 
Hits: 5805     Replies: 3
6T8
Júlio Branco
17.Jun.05 		  1
6T8 
This valve can be substituted directly by the following valves: EABC80 and 6AK8.

        
                                                              

Júlio Branco
Ernst Erb
18.Jun.05 		  2
Thank you 
I have now entered the "connection".
Can you load up the picture to the 6AK8 please?
Thanky you, Júlio
Júlio Branco
24.Jun.05 		  3
6AK8 

Dear Ernst,

 

I would like to satisfy his request, in fact he would have a lot of taste in doing the upload of the tube for Rmorg, but it happens that I neither have the picture nor the respective tube.

It can be that later manages to do it.

 

Best regards from,
Júlio Branco
Ernst Erb
26.Jun.05 		  4
6AK8 
Dear Júlio
OK, but the 6AK8 is just missing the schematic you published here (above).
Can you put it up?
Thank you.
 
6T8
End of forum contributions about this tube
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