Tubes Asylum

Posted by waldenpuddle (A) on April 30, 2007 at 10:04:50

So... I downloaded some of the tube ID sheets and really gave a good look around, but out of a batch of 10 or so, 3 of them just don't want to give up the ghost....

The first appears to be a twin triode 12A.. series, but need to verify with the asylum knowledge base. Good looking tube whatever it is...

The other two might be easier...

I THINK they are an EL84 and a 7189 from Mullard, but I can't tell which is which.

One has a date code of km1/BOB3 and the other has what looks like
?X3/B4J3 Can anyone confirm my suspicions on these.

Thanks for any and all help!!

• 1950s Heerlen 12AT7 - see pic - tubemonger 11:04:42 04/30/07 (2)
  In Reply to: Please help w/tube ID. (Pictures attached) posted by waldenpuddle on April 30, 2007 at 10:04:50:

  Yours is Holland made. Here is a picture of Copenhagen made 1950s ECC81 with similar style date codes....
  

  • 50s Philips Copenhagen 12AT7 SQ Getter Date Codes   (Open in New Window)

  
  

  ---

  • Re: 1950s Heerlen 12AT7 - see pic THANK YOU!! - waldenpuddle 11:48:03 04/30/07 (1)
    In Reply to: 1950s Heerlen 12AT7 - see pic posted by tubemonger on April 30, 2007 at 11:04:42:

    Once again....you guys are GREAT! Thank you.

    Any thoughts on the EL84/7189's?
    
    

    ---

    • rX and kM = EL84 tube type - tubemonger 10:47:12 05/02/07 (0)
      In Reply to: Re: 1950s Heerlen 12AT7 - see pic THANK YOU!! posted by waldenpuddle on April 30, 2007 at 11:48:03:

      Both are EL84's, Blackburn Production.
      
      

      ---
• Re: Please help w/tube ID. (Pictures attached) - Sondek 11:00:17 04/30/07 (0)
  In Reply to: Please help w/tube ID. (Pictures attached) posted by waldenpuddle on April 30, 2007 at 10:04:50:

  Cap "T" and small "k" indicates ECC81 or 12AT7. My best guess.
  
  

  ---