radiomuseum.org

EBC81

Information - Aide 
ID = 3425
       
Pays:
Europe
Fabricant:
Type:  Double Diode-Triode   Audio Frequency 
Identique à EBC81 = 6LD13 = 6BD7 = 6BD7A
Similaires
Différent chauffage :
  UBC81
Différent culot :
  EBC41
Autre culot / chauffage :
  EBC90
Première série Mar.1954 -- Original-techn. papers. see also models BX740A and BX449A
Première source
May.1956 : Histoire de la lampe de radio
Mar.1955 : Philips Bulletin see also models BX555Z and BX555A
Prédécesseurs EBC41  
Culot Noval, 9 pin miniature (USA pico-9) B9A
Utilisé par Radio/TV-reception etc.
Chauffage Vf 6.3 Volt / If 0.23 Ampère / Indirect / Specified voltage AC/DC
Description

Our first technical information shows March 1955 (Philips Bulletin). This is in contrast of a Philips Documentation in Dutch for the radio model BX740A, dated 1954 (in that documentation with number 93 981 75.1.22). There the EBC81 is listed as buizen B10.

The date is certainly in contrast with the US registration of the tube as 6BD7, 15 March 1950, and the date on the technical documentation released for the 6BD7 by Philips Australia, 11 November 1949. This inconsistency likely derives from commercial reasons, since for noval tubes Philips had to compete first on markets under more direct influence of American manufacturers, like the Australian one. In Europe Philips retained for the early fifties its rimlock line and only later it promoted noval tubes.

Part of the Innoval family, early noval tubes with frit-seal base sealing to envelope, first introduced by Philips Australia.

 
Prix 7 Prix (visible pour membres seulement)
ebc81.png
EBC81: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
no60_1.png EBC81: RTT 1974 (Franzis) 13. Auflage
Martin Renz

Just Qvigstad 		ebc81_data1.png
EBC81: Telefunken 1959
Robert Schmalstieg
Plus d'infos ...
Utilisé dans modèles 2= 1954?? ; 2= 1954 ; 3= 1955?? ; 1= 1955? ; 12= 1955 ; 6= 1956?? ; 9= 1956? ; 20= 1956 ; 8= 1957?? ; 18= 1957? ; 23= 1957 ; 2= 1958?? ; 15= 1958? ; 21= 1958 ; 3= 1959?? ; 17= 1959? ; 25= 1959 ; 14= 1960?? ; 17= 1960? ; 38= 1960 ; 6= 1961?? ; 12= 1961? ; 36= 1961 ; 9= 1962?? ; 6= 1962? ; 41= 1962 ; 2= 1963?? ; 6= 1963? ; 29= 1963 ; 2= 1964?? ; 7= 1964? ; 27= 1964 ; 4= 1965?? ; 4= 1965? ; 5= 1965 ; 1= 1966?? ; 12= 1966? ; 3= 1966 ; 1= 1967?? ; 6= 1967? ; 4= 1967 ; 1= 1968? ; 3= 1968 ; 1= 1969 ; 1= 1970?? ; 1= 1972? ; 1= 9999? ; 2= 9999
Modèles de Radiomuseum.org avec ce composant :489
Littérature "Funk-Technik (FT)" Vol. 14 No. 17 | 1959-09

Collection de

Collection d'un membre de FIN
Howard Craven (GB)
Pedro Prieto-Castro (E)
Michael Mischke (D)
Collection d'un membre de D
Georges Werts (B)
Jean-Luc Prevot (F)
Bekir Yurdakul (F)
George Papaiz (CDN)
Patrice Zeissloff (F)
Jacky Parmentier (F)
Tomasz Szczesniak (PL)
Tor Steinnes (N)
Trev Levick (D)
Hannu Alho (FIN)
Collection d'un membre de D
Danko Tkalec (HR)
Jacob Roschy (D)
Jürgen Küting (D)
Oskar Elm (D)
Karl - Heinz Bossan (D)
Christian Schaufelberger (CH)
João-Afonso Santos (P)
Peter Pfeiffer (D)
 
ebc81_40rm404d.jpg

EBC81
 
Contributions forum pour ce composant
EBC81
Discussions: 1 | Publications: 2
Vus: 3635     Répondre: 1
EBC81 (EBC81) 1959 or 1957?
Mario Coelho
17.Dec.05 		  1
EBC81 (EBC81) 1959 or 1957? 
Dear Friends

I try to create a new model of a CALYPSO MAMBO. Then  I noticed that one tube (the EBC81) could be invented in 1957, not in 1959 as is indicated in Rmorg, in this tube models's page.

The reason of this alert is  because in CALYPSO schematic diagram is written that this schematic was drawn in 1957.

I couldn't uplowd yet the schematic of this CALYPSO MAMBO because it was not accepted yet, but one can see the same tubes in CALYPSO schematic which was drawn also in 1957.


Also I've here one Mullard Radio Valve Manual printed in 1957 where I already can see this EBC81.

Best Regards

Mário
Jacob Roschy
17.Dec.05 		  2
Sans titre 

Hello Mário,

 

by checking my documents I found the EBC81 in an original  Philips document from March1955.

In the French book "Histoire de la lampe de radio" the author quotes a French radio magazine from May 1956 that mentions the EBC81.

 

These documents are proof evidences that the EBC81 was already invented before 1957


Best Regards

Jacob
 
EBC81
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