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    Tesla EL34 Question



    Posts : 160
    Join date : 2010-03-07
    Age : 78
    Location : Houston Texas

    Tesla EL34 Question

    Post by stewdan on Fri Dec 16, 2011 7:45 pm

    Hi --

    about 20 years ago I acquired a stash of Tesla (not JJ) EL34's with Dark Blue (Cobalt??) Glass Envelopes and promptly forgot about them. Recently, I found them in back of storage closet and thought that I would use them for a Dynaco ST-70 project. Some of the tubes had black bases, some had brown and some had a brown speckeled base, so I would guess the tubes are from the 1960's and 1970's.

    But, the pins don't fit the Dynaco's standard octal tube sockets and the tubes will not seat themselves. The same was true for the 2 tube testers that I tried them on. Even tried an octal socket extender that I had on hand and it was also a NOGO.

    Has anyone run into this problem with Tesla Brand Tubes?? Is there anyway to use the tubes other than filing down the pins??

    Please let me know. Thanks in advance!!


    Posts : 1265
    Join date : 2008-11-30

    Re: Tesla EL34 Question

    Post by tubes4hifi on Sun Dec 18, 2011 6:53 pm

    there were SOME octal tubes made back in the 50s-60s with slightly larger pins that won't fit most sockets,
    not much you can do with them unless you can find sockets that fit them

      Current date/time is Fri Oct 21, 2016 5:56 pm