Antique radios, Old Time Radios

EBC81

ID = 3425

Country:

Europe

Brand:	Common type Europe tube/semicond.
Tube type:	Double Diode-Triode Audio Frequency

Identical to

EBC81 = 6BD7A = 6LD13 = 6BD7

Similar Tubes

Heater different:

UBC81

Other base:

EBC41

Other base and other heater:

EBC90

First year

Mar.1954 -- Original-techn. papers. see also models BX740A and BX449A

First Source (s)

May.1956 : Histoire de la lampe de radio

Mar.1955 : Philips Bulletin see also models BX555Z and BX555A

Predecessor Tubes

EBC41

Base	Noval, 9 pin miniature (USA pico-9) B9A
Was used by	Radio/TV-reception etc.
Filament	Vf 6.3 Volts / If 0.23 Ampere / Indirect / Parallel, (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.
Tube prices	7 Tube prices (visible for members only)


	EBC81: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †

EBC81: Collection JR
Jacob Roschy

EBC81: RTT 1974 (Franzis) 13. Auflage
Martin Renz

EBC81: Telefunken 1959
Robert Schmalstieg

from Just Qvigstad

Usage in Models

1= 1954?? ; 2= 1954 ; 3= 1955?? ; 1= 1955? ; 13= 1955 ; 7= 1956?? ; 5= 1956? ; 19= 1956 ; 6= 1957?? ; 12= 1957? ; 20= 1957 ; 2= 1958?? ; 8= 1958? ; 18= 1958 ; 3= 1959?? ; 16= 1959? ; 22= 1959 ; 12= 1960?? ; 13= 1960? ; 32= 1960 ; 4= 1961?? ; 7= 1961? ; 36= 1961 ; 6= 1962?? ; 3= 1962? ; 39= 1962 ; 2= 1963?? ; 4= 1963? ; 28= 1963 ; 3= 1964?? ; 6= 1964? ; 27= 1964 ; 2= 1965?? ; 3= 1965? ; 5= 1965 ; 1= 1966?? ; 10= 1966? ; 3= 1966 ; 1= 1967?? ; 4= 1967? ; 2= 1967 ; 1= 1968? ; 1= 1968 ; 1= 1969 ; 1= 1970?? ; 1= 1972? ; 1= 9999? ; 2= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):419

Literature "Funk-Technik (FT)" Vol. 14 No. 17 | 1959-09

Forum contributions about this tube

EBC81

Threads: 1 | Posts: 2

Hits: 2556 Replies: 1

EBC81 (EBC81) 1959 or 1957?

Mario Coelho
17.Dec.05

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

No subject

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
End of forum contributions about this tube

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