The Dynaco Tube Audio Forum

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The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all products

    tube substitution


    Posts : 3
    Join date : 2014-04-03

    tube substitution Empty tube substitution

    Post by Davros19 on Thu Apr 03, 2014 4:10 am

    Hi All,
    I built an St70 kit about 8 years ago, and was very happy with it. I have been reading a lot on tubes and amps and am considering a new amp. I would like to know if the st-70 kit can utilize a different line -up of tubes and what mods would be required.
    I'm intrigued by combining the 274B rectifier and EL37 power tubes. I could go with 12au7 tubes ( my current line up is 12AT7, EL34 and GZ34). I also would like to try a GZ37 I have acquired. Can the 274B work with EL37?

      Current date/time is Mon Jul 13, 2020 6:35 pm