Antique radios, Old Time Radios

EF39

ID = 2496

Country:

Great Britain (UK)

Brand:	Mullard Radio Valve Co. Ltd.;
Developer:	Mullard Radio Valve Co. Ltd.;
Tube type:	Vacuum Pentode RF/IF-Stage Controlling (mu)

Identical to

EF39 = W147 = OM6 = CV1053 = CV1056 = VR53 = BVA243 = EF9G = VT181_GPO = ARP34

Similar Tubes

Normally replaceable-slightly different:

OM7

Heater and shape different:

6RV

Other base:

EF9

First year

1939 -- Collector info (Sammler)

First Source (s)

1939 : History of the British Radio Valve to 1940

Predecessor Tubes

EF9

Successor Tubes

ARP94

Base

Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uf)

Filament

Vf 6.3 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC

Description

Under the metallising a manufacturers/date/batch code comes to light, e.g. 1002MTA, which may be mistaken as a Type designation.

Tube prices

5 Tube prices (visible for members only)

Information source

-- Collector info (Sammler)
Taschenbuch zum Röhren-Codex 1948/49

EF39: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †
EF39: RTT 1974 (Franzis) 13. Auflage Martin Renz	Just Qvigstad	EF39: Manufacturer's Literature Emilio Ciardiello More ...

Usage in Models

1= 1939?? ; 2= 1939 ; 5= 1940?? ; 5= 1940? ; 17= 1940 ; 2= 1941?? ; 3= 1941? ; 6= 1941 ; 2= 1942?? ; 1= 1943 ; 1= 1944?? ; 1= 1944? ; 5= 1944 ; 1= 1945?? ; 4= 1945? ; 12= 1945 ; 4= 1946?? ; 9= 1946? ; 62= 1946 ; 8= 1947?? ; 23= 1947? ; 80= 1947 ; 11= 1948?? ; 16= 1948? ; 49= 1948 ; 7= 1949?? ; 8= 1949? ; 29= 1949 ; 7= 1950?? ; 5= 1950? ; 19= 1950 ; 2= 1951? ; 8= 1951 ; 2= 1952? ; 1= 1952 ; 1= 1954 ; 2= 1955?? ; 1= 1956?? ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):423

Museum "Philips Historische Producten"

Collection of

Jacob Roschy (D)

Siegfried Neumann (D)

Collection of a member from FIN

Antonio Varrica (I)

Joan Martinez (E)

Karlheinz Fischer (D)

Gwyn Griffiths (GB)

Tomasz Szczesniak (PL)

Ciro Guidi (I)

Piotr Trybuchowicz (PL)

Gerhard Heigl (A)

Jesús Casado Arriazu (E)

Howard Craven (GB)

Danko Tkalec (HR)

Timo Rantasaari (FIN)

Lars Nord (S)

Erwin Serle (F)

EF39

Forum contributions about this tube

EF39

Threads: 1 | Posts: 4

Hits: 5390 Replies: 3 EF39 (EF39) Mullard Manufacturing Codes
Roy Johnson 07.Dec.06	1 EF39 (EF39) Mullard Manufacturing Codes Dear Valve Enthusiasts, There was a recent discussion about the "1002MTA" which turned out to be an EF39 with the metallising and name removed. The following link gives some more information on EF39 markings from valves of the 1939 to 1945 period (and also mentions similar Octal Mullard valves). Click here Best regards and happy collecting and repairing! Roy
Hans-Thomas Schmidt 09.Dec.06	2 No subject Hello Roy, behind the listed link, we can found some names with different codification for the EF39: ZA3493: British code from MOV ARP34: British army code 10E/11399: Royal air force code VR53: Royal air force code CV1053: Common valve military code EF39: European civil common code additional: OM 6, Cossor W 147, England 6 M 7 MG, French with metal shield. In the following link, you can find a list of the coding from british manufacturers. This site is in norwegian language but very interesting: http://www.nrhf.no/nrhf-rornum-mil.html#br Best regards, Hans-Thomas
John Turrill 09.Dec.06	3 No subject Hello Roy, I wonder if you are familiar with Jeremy Harmer's site, where he has a very comprehensive lot of information on the British CV (Common Valve) system? Well worth exploring for military types.---- http://www.tubecollector.org/cv-valves.htm Regards, John Turrill.
Roy Johnson 09.Dec.06	4 CV Valves and the UK Services Dear Hans-Thomas and John, Thank you for the comments and the information. Yes, the Norwegian site is very good, I had not seen that one before and there is a lot of interesting data. The link that I quoted was actually my own site and it was quicker to expand on the original short note than to re-write here. The variety of names can sometimes be confusing and also "equivalent" is quoted instead of "possible substitutes". That is where we shall have to be careful in the information given in the valve/tube data in this museum. I am delighted that there are so many sites taking up the interest in valves and yes, Jeremy's is excellent having started his collection so relatively recently and achieved such a comprehensive real collection. I often visit and admire! Thank you both and kind regards, Roy

EF39
End of forum contributions about this tube

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