Stepdown Transformer for Mcintosh

Discussion in 'McIntosh Audio' started by munkong, Sep 12, 2017.

  1. munkong

    munkong Member

    Messages:
    56
    Hello, Everyone

    My country current is 240-220V, and I already bought Mcintosh MX110z and Mcintosh MC240,
    now I also bought one big Stepdown transformer 1500VA to use with these Mcintosh, it can select output with 110V or 115V (Toyozumi brand)

    and I try to tab with 2 choice and measure with volt meter it's result is 109V and 119V
    my question is 109V or 119V is best for Mcintosh (117V) ? and will not damage to my all Mcintosh and still have better sound?

    Please advice me

    Thanks
     
  2. Pio1980

    Pio1980 AK Member Subscriber

    Messages:
    21,768
    Location:
    Angel Station, Alabama
    119 VAC is the best option.
     
    munkong likes this.
  3. munkong

    munkong Member

    Messages:
    56
    109 V is safe or 119 still safe for all Mc ?
    I just measure current again, and it result is 120 VAC
    It still the best?
     
  4. munkong

    munkong Member

    Messages:
    56
    [​IMG] http://www.mediafire.com/view/po4lcpj4l8q85bw/S__25141290.jpg#
    please look at to my stepdown, it have input with 220 and 240 VAC
    and I can select output with 110 and 115 VAC

    but when I tap with 240 VAC output will be 108-110 VAC
    but when I tatp with 220 VAC output will be 119-120 VAC

    I still want your opinion :D
     
  5. Pio1980

    Pio1980 AK Member Subscriber

    Messages:
    21,768
    Location:
    Angel Station, Alabama
    Yes.
     
  6. 62caddy

    62caddy Trust but verify Subscriber

    Messages:
    7,804
    Location:
    NEPA
    A/C will occasionally go as high as 125 VAC here. Not an issue with any Mc in my sig.
     
  7. kevzep

    kevzep Its all about the Music

    As others have said....It seems that power in the USA is 120V for the most part, if you look on the back of the older Mc gear its says 117VAC, the newer stuff like my C48 for example says 120VAC.

    In NZ here our power is 230 +/- 6%, I am not sure what the standard is in USA, but its probably similar.

    +/- 10% is perfectly acceptable for equipment. I deal with having to provide 120V power for touring acts which come through NZ and they always ask for 120VAC, if its getting down near 115VAC they don't like it want us to tap the transformer up as close to 120VAC as possible...

    So long and the short of it is, as close to 120VAC as possible...:thumbsup:
     
    munkong and 62caddy like this.
  8. munkong

    munkong Member

    Messages:
    56
    Thanks to everyone,

    Summarize :

    A little higher voltage is better than lower voltage.
    120VAC is better than 110VAC for Vintage Mcintosh (117V)
     
  9. 62caddy

    62caddy Trust but verify Subscriber

    Messages:
    7,804
    Location:
    NEPA
    Best summary - closest to 120V +/- .
     
    munkong likes this.
  10. munkong

    munkong Member

    Messages:
    56
    Very Best Summary - closest to 120V +/- :)
     
  11. rollcentre

    rollcentre Boom-tizzz

    Messages:
    434
    Location:
    DFW,TX, United States
    I mostly run my tube stuff on step down trans. I have one of those TV isotap isolation/direct trans that will output 3 diff voltages. The mc240 has a switch that let's you choose 117 or 125, I set for 125 and run it off the wall voltage (usually avg 124v) The mx110 I run into the "med" plug off the TV Isotap which is about 115v. I run my td124 on 110v "low" plug and the motor runs cooler. The mx power trans seems to heat up less quickly when it's running at 115v. Every little bit helps on those MX110Z
     

Share This Page