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Thread: mc step-up transformer database

  1. #1
    Join Date: Oct 2016

    Location: Bolton, England

    Posts: 312
    I'm Andrew.

    Default mc step-up transformer database

    There seems to be precious little information regarding actual specs about many of the step-up transformers available today, either those in current production or vintage units, so I think it would be useful to compile a database. Even such basic information as the turns ratio seems to be hard to find for most transformers. However, in order to compile the database I'll need to take measurements so I'm asking for some assistance from forum members. If anyone has a step-up transformer they are willing to lend to me for a few days I'd be glad of the opportunity to make some measurements and add the info to the database which I will make freely available. I promise to be very careful with your SUT and return it safely.
    I can be contacted by PM here on the forum or by the email address you'll see on the front page of the website
    http://www.rothwellaudioproducts.co.uk/
    Thanks in advance for any cooperation and assistance I receive.

    Andrew
    Last edited by RothwellAudio; 27-10-2016 at 10:19.

  2. #2
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 67,741
    I'm AudioAl'sArbiterForPISHANTO.

    Default

    Hi Andrew,

    Great idea, mate! Please also post about this in the DIY room and Analogue Art, by starting threads there (or simply linking to the one here), so that your suggestion gets maximum exposure to potential interested parties

    Marco.
    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do". - Milan Kundera.

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  3. #3
    Join Date: Oct 2016

    Location: Bolton, England

    Posts: 312
    I'm Andrew.

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    Ok, will do.

  4. #4
    Join Date: Jul 2016

    Location: Welsh Borders

    Posts: 175
    I'm Gary.

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    Andrew, I'll happily bung you my Audio Technica 630 for measurement. Not exactly high-end, but popular and versatile so worth including. I'm currently in the process of getting a head amp, so I'll hang on to it for the moment until that arrives, but I'll contact you again when I'm in a position to part with it. Regards. Gary.

  5. #5
    Join Date: Oct 2016

    Location: Bolton, England

    Posts: 312
    I'm Andrew.

    Default

    Thanks Gary, that would be very useful and much appreciated. The AT 630 is just the kind of thing I had in mind because they're typical of what's available second hand on ebay. Other likely candidates would be the various Denons and the little Ortofon T5s etc.
    BTW, are you aware of the headamp I make?
    http://www.rothwellaudioproducts.co....c_headamp.html
    Since you're being kind enough to lend me your step-up transformer you would be welcome to borrow a Headspace to try out.

  6. #6
    Join Date: Aug 2014

    Location: Derbyshire

    Posts: 60
    I'm Matthew.

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    Hi Andrew - there is a bit of info on the S&B TX103s about so I'm not sure whether you'd want them? I'm happy to bring them to you though, if so. It's the pair you tested for me a few months back - let me know and I can drop them off (before I sell them! Gone back to moving iron).

    Cheers, Eddie

  7. #7
    Join Date: Oct 2016

    Location: Bolton, England

    Posts: 312
    I'm Andrew.

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    Quote Originally Posted by eddieedwards View Post
    Hi Andrew - there is a bit of info on the S&B TX103s about so I'm not sure whether you'd want them? I'm happy to bring them to you though, if so. It's the pair you tested for me a few months back - let me know and I can drop them off (before I sell them! Gone back to moving iron).

    Cheers, Eddie
    Hi Eddie
    Yes, I'd like to measure them, thanks. If I use the same test procedure for all the transformers it will make make for a fairer comparison.

  8. #8
    Join Date: Apr 2012

    Location: London

    Posts: 142
    I'm james.

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    If I may ask, what is the measurement process and equipment to be used?


    Sent from my GT-I9195 using Tapatalk

  9. #9
    Join Date: Oct 2016

    Location: Bolton, England

    Posts: 312
    I'm Andrew.

    Default

    The intention is to make a few simple measurements just to give people the essential information they need when looking at step-up transformers on ebay etc. However, the measurements will be relevant ones and will be consistent for all the transformers. Firstly will be the turns ratio. Then I'll measure the frequency response with a 47k+220pF load and use 3 ohm, 10 ohm and 40 ohm source impedances. Also there may a note about the square wave response. Of course, there are lots of other measurements which could be made but I think these will give the typical audiophile enough information to make an informed choice without suffering information overload. At present there seems to be pretty much no information available whatsoever on most of the transformers which crop up on the second hand market.
    I will avoid subjective evaluations of sound quality.

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