McIntosh Mc30 Transformer

Discussion in 'McIntosh Audio' started by Stromung, Mar 14, 2017.

  1. Stromung

    Stromung Member

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    All
    The stickers are usually 152b and 152d.
    I found one with 224m and 225m
    What does it mean?
     
  2. clinic-audio

    clinic-audio all on YAMAHA untill 1990

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    Hello Stromung

    224M and 225M mean that they are MC40 transformer decal !

    MC40-decal.JPG
     
  3. Stromung

    Stromung Member

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    54
    Thanks
    does that mean sonic signature is changed?
     
  4. SilverTpt999

    SilverTpt999 Member

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    There is the possibility that the original stickers went missing, and someone replaced them with the MC40 decals.
     
  5. Stromung

    Stromung Member

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    54
    I looked and compared the size, mc40 and mc30 transformer looks the same
     
  6. clinic-audio

    clinic-audio all on YAMAHA untill 1990

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    Location:
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    Thanks does that mean sonic signature is changed?

    no, I said "decal" not "transformers"


    looked and compared the size, mc40 and mc30 transformer looks the same

    Of course the transformers cans are the same but not transformers inside !
     
  7. whoaru99

    whoaru99 Epic Member Subscriber

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    How would one know, or determine, if it's just a decal thing or if actually MC40 OPTs?
     
  8. clinic-audio

    clinic-audio all on YAMAHA untill 1990

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    Confusion is not possible

    MC30-output-transfomer-schematic.JPG MC40-output-transfomer-schematic.JPG
     
  9. whoaru99

    whoaru99 Epic Member Subscriber

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    That was the point of my post. :)

    With sufficient detail it can be confimed, but not by simply looking at the decal or the can of the OPT.
     
  10. x3workshop

    x3workshop AK Subscriber Subscriber

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    Any update here? Were you able to determine if they are 40 or 30 Transformers?
     
  11. Stromung

    Stromung Member

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    54
    I passed it, did not have the confidence to buy it, after all transformer is a very important key to each amplifier sonic signature
     

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