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EF39

Information - Aide 
ID = 2496
       
Pays:
Royaume Uni
Fabricant: Mullard Radio Valve Co. Ltd.;
Concepteur: Mullard Radio Valve Co. Ltd.;  
Type:  Vacuum Pentode   RF/IF-Stage   Commande 
Identique à EF39 = W147 = OM6 = CV1053 = CV1056 = VR53 = BVA243 = VT181_GPO = EF9G = ARP34
Similaires
Remplaçants avec petites différences :
  OM7
Chauffage et forme différents :
  6RV
Différent culot :
  EF9
Première série 1939 -- Collector info (Sammler)
Première source
1939 : History of the British Radio Valve to 1940
Prédécesseurs EF9  
Successeurs ARP94  
Culot Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uf)
Chauffage Vf 6.3 Volt / If 0.2 Ampère / 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. 
Prix 5 Prix (visible pour membres seulement)
Bibliographie -- Collector info (Sammler)   
Taschenbuch zum Röhren-Codex 1948/49   
ef39.png
EF39: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
oc10_2.png EF39: RTT 1974 (Franzis) 13. Auflage
Martin Renz

Just Qvigstad 		ef39_001.png
EF39: Manufacturer's Literature
Emilio Ciardiello
Plus d'infos ...
Utilisé dans modèles 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?? ; 7= 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
Modèles de Radiomuseum.org avec ce composant :422
Musée "Philips Historische Producten"

Collection de

Jacob Roschy (D)
Siegfried Neumann (D)
Collection d'un membre de 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_rn.jpg

EF39
 
Contributions forum pour ce composant
EF39
Discussions: 1 | Publications: 4
Vus: 5265     Répondre: 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
Sans titre 
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
Sans titre 
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.----
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
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