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Thread: SUT Question...

  1. #1
    Join Date: Jan 2019

    Location: Cambridgeshire, United Kingdom

    Posts: 200
    I'm Russell.

    Default SUT Question...

    I'm very new to the world of MC cartridges so please bear with me here.

    I'm currently using a Goldring Eroica L MC cartridge with an output 0.25mV running into my Dynavector 100P Phono Stage which has 63db of gain & 100 ohm loading.

    As the output is still very quiet, I've bough a used 1:15 SUT (Klaus Hurler with BD transformers) which is really for a Denon 103r but thought I'd give it a whirl but I haven't noticed any volume output difference at all (in fact if anything it appears quieter than when using the DV MC stage on it's own).

    Have I done something wrong here is it just the SUT I've got isn't compatible with my cartridge or Phono Stage?

    Thanks.

  2. #2
    Join Date: Feb 2016

    Location: Melksham, Wiltshire

    Posts: 634
    I'm Peter.

    Default

    There are others with more knowledge than I, so wait for others to respond before doing anything drastic.

    I think a ratio of 1:15 (Medium) is a bit on the low side for your particular cartridge and a Ratio of 1:20 may be more suitable.

    Mind you, Iím not a SUT expert, so take this advice with a pinch of salt and wait for more expert advice from others.


    Sent from my iPad using Tapatalk

  3. #3
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 5,063
    I'm Alan.

    Default

    What is the spec of your MM Input?
    If it is the typical 40dB gain then using a 15:1 SUT puts you at virtually the same gain levels as going direct to your MC input.

  4. #4
    Join Date: Jan 2019

    Location: Cambridgeshire, United Kingdom

    Posts: 200
    I'm Russell.

    Default

    Quote Originally Posted by Firebottle View Post
    What is the spec of your MM Input?
    If it is the typical 40dB gain then using a 15:1 SUT puts you at virtually the same gain levels as going direct to your MC input.
    Not sure of the gain on the MM input on the P100 but I recall reading about 63db?

    As you mention though, the current 1:15 SUT I'm using through the MM is probably slightly less in volume in going straight into my MC input so no advantage at all.

  5. #5
    Join Date: Nov 2008

    Location: Banbury, Oxfordshire/Panteg is where my late father was born

    Posts: 4,317
    I'm Chris.

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    Try a 1-20 ratio, my puresound T10 is 1-18 or 1-36 and the 1-18 gives higher output I believe because it matches my AT33EV better.
    Chris

    We've gone on holiday by mistake !

  6. #6
    Join Date: Jan 2009

    Location: Essex

    Posts: 20,839
    I'm openingabottleofwine.

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    You really need a 1:20 turns ratio SUT. This will boost the 0.25mV output of the cartridge to 5mV, and at the same time will present an impedance to the cartridge of ~120 Ohm.
    Barry

  7. #7
    Join Date: Apr 2012

    Location: London

    Posts: 552
    I'm James.

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    Does your phono stage have a phono enhancer in it, and if so is it switched on by any chance? That might be a cause? Worth playing with anyway..

    Sent from my BLA-L09 using Tapatalk

  8. #8
    Join Date: Jan 2019

    Location: Cambridgeshire, United Kingdom

    Posts: 200
    I'm Russell.

    Default

    Thanks for everyoneís replies.

    Iíve now bought a Denon 103r which Iím running with the 1:15 SUT through the MM input on my Nova Fidelity X40 & very happy!

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