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Thread: Low Volume from Dual Turntable (via preamp) with Cambridge Audio Amp

  1. #31
    Join Date: Apr 2012

    Location: N E Kent

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    I'm Geoff.

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    Quote Originally Posted by Valentiaman View Post
    Thanks again Grant, it's unlikely I can find one on my Island(!) but I've got my eye on a new Marantz PM5005, good deal on Amazon right now - €55 less than I could get it from a Dublin dealer, even with postage costs. Is that a good match for the Dual 505 (assuming it's OK).
    I reckon you'll probably be OK with the Marantz. It's not an amp I know, but it seems well liked and does not cost a fortune. Your phono stages should work with it.

  2. #32
    Join Date: Apr 2012

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    I'm Geoff.

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    Quote Originally Posted by Macca View Post
    That sounds like the amp. If the hum is always the same level regardless of the volume it is the transformer. If that's the case you'll need a new amplifier, repairing it won't be cost effective unless you can do it yourself.
    Martin is right. If the hum is there regardless of what source is feeding inputs, I'd guess it's knackered!

  3. #33
    Join Date: May 2018

    Location: Ireland

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    Thanks for the recent replies, I'll try and respond to each Below:

    Originally Posted by Macca: That sounds like the amp. If the hum is always the same level regardless of the volume it is the transformer. If that's the case you'll need a new amplifier, repairing it won't be cost effective unless you can do it yourself.

    I can hear the hum from halfway up on the volume dial. It does get a bit louder as the volume goes higher, but it stays the same tone and never gets very loud.

    Originally Posted by Macca: Alongside the phono cables running out of the TT you should have an earth lead. That needs to be connected to the phono stage. If it is already connected try disconnecting it.

    I disconnected the ground wire and the volume was the same, but the "click" when the tonearm moved to the record was much louder through the speakers.

    Originally Posted by Two Tone: Sounds like an earth issue, try moving the phono stages away from the amp or TT or TV etc.

    Because of the short ground wire, I can't move the preamp very far from the amp or TT, but it's not resting on either of them.

  4. #34
    Join Date: Feb 2013

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    Phone stage may be picking up noise. Try moving it by extending the earth. Also try moving other wires behind like interconnects away from mains cables and everything away fro
    Phono
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  5. #35
    Join Date: Apr 2012

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    It's noisy on CD too though Grant.

  6. #36
    Join Date: May 2018

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    Quote Originally Posted by walpurgis View Post
    It's noisy on CD too though Grant.
    It's buzzing with nothing plugged in except speakers.

  7. #37
    Join Date: Feb 2010

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    Quote Originally Posted by Valentiaman View Post
    It's buzzing with nothing plugged in except speakers.
    You may have some hum coming from another appliance or noisy mains. Try going round the house turning things like fridges and heating off and see if the hum goes. if it does, a mains filter is in your future.
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  8. #38
    Join Date: May 2018

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    Quote Originally Posted by Smegger68 View Post
    You may have some hum coming from another appliance or noisy mains. Try going round the house turning things like fridges and heating off and see if the hum goes. if it does, a mains filter is in your future.
    Turned off fridge, electric cooker, immersion heater and TV / Sound bar. No change. I have only been in this house 18 months (and it's bigger than my last place) and I'm fairly sure the buzzing was happening there too. But if it is a gound loop (I think that's what it's called), I can't find it.

  9. #39
    Join Date: Jan 2009

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    Try disconnecting all the sources from your amplifier, and then see if the hum is still there regardless of which source is chosen on the amp.
    Barry

  10. #40
    Join Date: May 2018

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    Quote Originally Posted by Barry View Post
    Try disconnecting all the sources from your amplifier, and then see if the hum is still there regardless of which source is chosen on the amp.
    Already done that Barry...mentioned it a few times in previous posts. It is.

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