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    Transformer layout question



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    Join date : 2015-03-12

    Transformer layout question

    Post by 1bigpig on Thu May 28, 2015 12:35 pm

    I was at my local audio repair shop and saw an Audio Research D125.  
    ARC D125" />" />
    It looks pretty heavy duty but what caught my eye was the fact that all three transformers were in a row right next to each other.  I thought you had to turn the transformers 90 degrees to each other to keep them from interfering with each other?  Does Audio Research know this?

    To keep this relevant, I was told that ARC's first power amplifiers were based on Dynaco ST-70 amplifiers.


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    Re: Transformer layout question

    Post by sKiZo on Thu May 28, 2015 5:19 pm

    Appearances can be deceiving ...

    Still hard to tell, but I'd think they kept with convention, and just went with matching pot covers ...


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    Re: Transformer layout question

    Post by GP49 on Thu May 28, 2015 5:38 pm

    1bigpig wrote:...I was told that ARC's first power amplifiers were based on Dynaco ST-70 amplifiers.


    The Audio Research ST-70-C3 was a rebuild of the Dynaco Stereo 70, using
    the chassis and transformers.

    The Audio Amateur magazine published a construction article for it, and
    Old Colony Sound Lab (The Audio Amateur magazine's retail operation)
    sold a kit of parts with instructions.

    Link to page about it:

    Audio Research Database: ARC ST-70-C3

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    Re: Transformer layout question

    Post by corndog71 on Thu May 28, 2015 5:51 pm

    Looks like they still do it that way.

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    Re: Transformer layout question

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