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Thread: Quick check - Airlink BMU - which one?

  1. #21
    Join Date: Nov 2015

    Location: Wolverhampton

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    I'm Oliver.

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    Quote Originally Posted by Barry View Post
    Hard to tell from the photo - what does the manufacturer say?

    It is not sufficient to have an overcurrent protection device on the input alone.
    I've posted the specs above, Barry.
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Firebottle modded Xiang Sheng DAC (Telefunken Valve)
    Amplification: Slagle AVC Passive Preamp & Firebottle Monoblocks (Telefunken Valves)
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables Throughout
    Speakers: Pioneer CS-77A

  2. #22
    Join Date: Nov 2015

    Location: Wolverhampton

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    I'm Oliver.

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    It's a thermal Circuit breaker BTW.
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Firebottle modded Xiang Sheng DAC (Telefunken Valve)
    Amplification: Slagle AVC Passive Preamp & Firebottle Monoblocks (Telefunken Valves)
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables Throughout
    Speakers: Pioneer CS-77A

  3. #23
    Join Date: Jan 2009

    Location: Essex

    Posts: 17,609
    I'm openingabottleofwine.

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    Quote Originally Posted by Bigman80 View Post
    I've posted the specs above, Barry.
    Yes I know - and I would still prefer to see fast-acting protection devices fitted to both the primary and secondary side of the transformer.
    Have you listened to this month's choice in the Album Club?

    Barry

  4. #24
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,373
    I'm Oliver.

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    Quote Originally Posted by Barry View Post
    Yes I know - and I would still prefer to see protection devices fitted to both the primary and secondary side of the transformer.
    Ah, I didn't know if you had seen it.

    Prefer......yup,
    Necessary......nope,

    Well, according to the CE anyway.
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Firebottle modded Xiang Sheng DAC (Telefunken Valve)
    Amplification: Slagle AVC Passive Preamp & Firebottle Monoblocks (Telefunken Valves)
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables Throughout
    Speakers: Pioneer CS-77A

  5. #25
    Join Date: Apr 2008

    Location: Warrington

    Posts: 2,915
    I'm Neil.

    Default Quick check - Airlink BMU - which one?

    Thing is that balanced mains arenít usually used at home... there is a potential fault condition where a fuse blows in the live phase, but you could still have 120V across neutral. This is why RCBOs are used on the secondaries, it would detect this fault condition. Donít forget that the gear is no longer bonded to earth, but bonded to the centre tap of the secondary.
    Mana Acoustics Racks / Bright Star IsoNodes Decoupling >> Custom Silent Media Server >> Halide Bridge USB (with AQVOX USB power) >> Pedja Rogic's Audial Model S DAC + Pioneer PL-71 turntable / Vista Audio phono-1 mk II / Denon PCL-5 headshell / Reson Reca >> LFD DLS >> LFD PA2M (SE) >> Royd RR3s.

  6. #26
    Join Date: Oct 2008

    Location: Glasgowshire

    Posts: 6,682
    I'm availableforweddingsAndBarmitzvas.

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    Quote Originally Posted by Yomanze View Post
    Thing is that balanced mains aren’t usually used at home... there is a potential fault condition where a fuse blows in the live phase, but you could still have 120V across neutral. This is why RCBOs are used on the secondaries, it would detect this fault condition. Don’t forget that the gear is no longer bonded to earth, but bonded to the centre tap of the secondary.
    Yup.
    RCBO’s on primary and secondary would be (and was) my choice.
    Know that thing you JUST KNOW you hear when your hearing it?
    Currently hearing it....not about
    the hifi anymore, rediscovering my music.

    192 MP3 and upwards..all good.
    (And have SME V driven vinyl too)

    Life is certainly not shit.

  7. #27
    Join Date: Jan 2009

    Location: Essex

    Posts: 17,609
    I'm openingabottleofwine.

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    Quote Originally Posted by Yomanze View Post
    Thing is that balanced mains aren’t usually used at home... there is a potential fault condition where a fuse blows in the live phase, but you could still have 120V across neutral. This is why RCBOs are used on the secondaries, it would detect this fault condition. Don’t forget that the gear is no longer bonded to earth, but bonded to the centre tap of the secondary.
    Which in turn is connected to the mains earth, or should be. Otherwise your are correct in what you say.

    Also there could be a fault with partial insulation breakdown (surface tracking) such that a leakage current of more than 30mA is drawn from one side of the transformer secondary winding. This leakage current will thus in turn be drawn from the primary, but will not be a 'residual' current as it will flow equally in the live and neutral wires of the (unbalanced) primary side, so any RCBO fitted in the consumer unit will not be affected and will not operate under this fault condition.
    Have you listened to this month's choice in the Album Club?

    Barry

  8. #28
    Join Date: Jul 2010

    Location: North Oxfordshire

    Posts: 26
    I'm Jonathan.

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    Hi Jerry

    How did you get on the Airlink balanced power supply? I'm thinking of getting one for my active speakers and digital front end.

    Jonathan

  9. #29
    Join Date: Jan 2009

    Location: Sheffield - UK

    Posts: 5,978
    I'm Mark.

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    I have mixed feelings about mine.....

    100% Analogue

  10. #30
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,373
    I'm Oliver.

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    Quote Originally Posted by YNWaN View Post
    I have mixed feelings about mine.....
    Do tell
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Firebottle modded Xiang Sheng DAC (Telefunken Valve)
    Amplification: Slagle AVC Passive Preamp & Firebottle Monoblocks (Telefunken Valves)
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables Throughout
    Speakers: Pioneer CS-77A

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