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Thread: Cartridge Gain Question

  1. #1
    Join Date: May 2009

    Location: Wales, UK

    Posts: 265
    I'm Simon.

    Default Cartridge Gain Question

    As per title - I have an Audio Technica AT33PTG11. I'm using a Croft RIAA phono stage and am looking for a suitable SUT. What kind of gain should I be looking at?
    Cheers.
    Simon.

  2. #2
    Join Date: Apr 2009

    Location: Near Saffron Walden, Essex

    Posts: 6,328
    I'm Dave.

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    Take a look at the Rothwell head amps and x'mers. Excellent quality and very reasonable prices.

  3. #3
    Join Date: Jan 2009

    Location: Essex

    Posts: 19,548
    I'm openingabottleofwine.

    Default

    The cartridge has a typical output of 0.3mV, so an SUT with a 10:1 ratio will boost it to 3mV, which ought to be sufficient with the sensitivity of the Croft preamp (which model is it?).

    Assuming the croft offers a load of 47KOhm, then the impedance as seen by the cartridge will be ~470 Ohm, which again ought to be fine with the AT33PTG. If you do need a lower value, then you can add a loading resistor in parallel with the secondary winding of the SUT.
    Have you listened to this month's choice in the Album Club?

    Barry

  4. #4
    Join Date: May 2009

    Location: Wales, UK

    Posts: 265
    I'm Simon.

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    Thanks guys. Excellent info as always . The Croft RIAA phono has been a revelation. I've been running a cheapo Tonar Diablo cartridge through it and it really shouldn't sound as good as it does for a sub 50 cartridge. I'm curious as to how good the AT33PTG11 would sound.
    I keep trying to convince myself that the Tonar is all I really need but there's always that nagging voice, isn't there?
    Simon.

  5. #5
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 8,171
    I'm Oliver.

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    Quote Originally Posted by cuddles View Post
    Thanks guys. Excellent info as always . The Croft RIAA phono has been a revelation. I've been running a cheapo Tonar Diablo cartridge through it and it really shouldn't sound as good as it does for a sub 50 cartridge. I'm curious as to how good the AT33PTG11 would sound.
    I keep trying to convince myself that the Tonar is all I really need but there's always that nagging voice, isn't there?
    Great cart the AT33PTGII.
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  6. #6
    Join Date: Dec 2016

    Location: Kent uk

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    I'm Martin.

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    Quote Originally Posted by hifi_dave View Post
    Take a look at the Rothwell head amps and x'mers. Excellent quality and very reasonable prices.
    +1

  7. #7
    Join Date: Apr 2009

    Location: Near Saffron Walden, Essex

    Posts: 6,328
    I'm Dave.

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    All the Rothwell products are unbeatable for the price.

  8. #8
    Join Date: Jul 2013

    Location: Kingsbury, NW London

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    I'm Clive.

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    Quote Originally Posted by Bigman80 View Post
    Great cart the AT33PTGII.
    +1
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  9. #9
    Join Date: Oct 2012

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    I'm Alan.

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    I have an upgraded A&R HA-10 head amp that I am looking for 90, I'll include delivery.

  10. #10
    Join Date: Jan 2013

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    I'm James.

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    Quote Originally Posted by Clive197 View Post
    +1
    I see you have a Qutest there now Clive, what do you think of it?

    I had one a few months back and was wowed!
    VPI Scout 1.1 - Ortofon 2M Black FGS - Croft 25R+ - Croft Series 7 - Spendor SP2

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