MR 71 tubes

Discussion in 'McIntosh Audio' started by Jim Carr, Jan 7, 2018.

  1. Jim Carr

    Jim Carr New Member

    Messages:
    26
    Location:
    Loleta, CA
    Hey!
    I just found out that someone had put a 12AX7 where a 12AT7 should be (RF amp - mixer) It works well but should I replace it? If I should replace it what would you recommend

    Thanks, Jim.
     

     

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  2. dewickt

    dewickt Will fix about Anything

    Messages:
    3,394
    Location:
    Knoxville, TN
    Change it, can effect alignment drastically.
     
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  3. Jim Carr

    Jim Carr New Member

    Messages:
    26
    Location:
    Loleta, CA
    OK, now what brand would be best? I found a thread that said Mullard M8162 is a very good replacement. I also think that GE made Mac tubes. Then there is JJ gold pins etc. Any suggestions?
     
  4. dewickt

    dewickt Will fix about Anything

    Messages:
    3,394
    Location:
    Knoxville, TN
    Originals were Telefunkins, I personally select for best sensitivity and don't worry about brand.
     
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