radiomuseum.org

 
Please click your language flag. Bitte Sprachflagge klicken.

EF39

Information - Help 
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 = ARP34 = W147 = OM6 = CV1053 = CV1056 = VR53 = BVA243 = VT181_GPO = EF9G
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 / Parallel / series 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 4 Tube prices (visible for members only)
Literature -- Collector info (Sammler)   
Taschenbuch zum Röhren-Codex 1948/49   
  ef39.png
  EF39: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
ef39_rn.jpg
EF39: Collection JR
Jacob Roschy

 
oc10_2.png
EF39: RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
ef39_001.png
EF39: Manufacturer's Literature
Emilio Ciardiello


Usage in Models 1= 1939?? ; 2= 1939 ; 5= 1940?? ; 5= 1940? ; 16= 1940 ; 1= 1941?? ; 1= 1941? ; 6= 1941 ; 2= 1942?? ; 1= 1942 ; 1= 1943 ; 1= 1944?? ; 1= 1944? ; 5= 1944 ; 1= 1945?? ; 3= 1945? ; 12= 1945 ; 2= 1946?? ; 6= 1946? ; 58= 1946 ; 7= 1947?? ; 15= 1947? ; 79= 1947 ; 11= 1948?? ; 14= 1948? ; 48= 1948 ; 5= 1949?? ; 4= 1949? ; 26= 1949 ; 8= 1950?? ; 3= 1950? ; 19= 1950 ; 1= 1951? ; 8= 1951 ; 1= 1952? ; 1= 1952 ; 1= 1954 ; 1= 1955?? ; 1= 1956?? ; 1= 1960?? ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):385



Forum contributions about this tube
EF39
Threads: 1 | Posts: 4
Hits: 3939     Replies: 3
EF39 (EF39) Mullard Manufacturing Codes
Roy Johnson
07.Dec.06
  1

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 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
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

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

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
rmXorg