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Thread: Audible hum in Timestep HEIII PSU

  1. #1
    Join Date: Dec 2017

    Location: Glasgow UK

    Posts: 3
    I'm Alan.

    Default Audible hum in Timestep HEIII PSU

    Hi folks tried to hunt in case this was covered but cant see it. I just had a Timestep PSU fitted to my 1210.

    Even via a mains conditioner , with TT disconnected and no wires around it the unit otself is humming and has a very subtle but present vibration if touched.

    Anyone had same or/and knows a resolution ?

    Thanks in advance

  2. #2
    Join Date: May 2012

    Location: Toulouse

    Posts: 4,498
    I'm GettingFunky.


    Is it a new PSU, and who fitted it?
    Happily dabbling with digital audio and tinkering with turntables.

  3. #3
    Join Date: Sep 2017

    Location: Northampton

    Posts: 177
    I'm Chris.


    Transformer might be a bit loose in the housing. But supplier should fix that, not you.

  4. #4
    Join Date: Nov 2016

    Location: North East England

    Posts: 464
    I'm Mick.


    I had the same supply fitted to my 1210 and it did have a very slight hum nothing major unless you put your ear near it. My friend also has the same and his was a lot louder than mine but not to the level of disturbing your music playing. I was told you can add a piece of rubber under the internals but it didn't warrant it to be honest. If its not crazy loud I wouldn't mess about with it. As Chris said try tightening the bolt on the bottom that holds the transformer internals. Also I thought all PSUs hum to some extent whilst powered on?
    Technics SL1210 MK2 fully rebuilt and repainted. Ortofon 2M Black Cart, Isonoe isolation feet and boots, Kab main bearing upgrade, Oyaide RCA Tone Arm and speaker cables, Jelco SA-750D Tonearm. Oyaide HS-TF Carbon headshell, Timestep HE III External PSU, High Fidelity Crystal glass turntable matt, Blue LED upgrade, Denon AVR-2808CI Amp, Bowers and Wilkins DM602S3 Speakers,
    Black Rhodium Jazz power cables for amp and turntable, Angle Audiophile Reference 2 Battery Phono Stage.

  5. #5
    Join Date: May 2012

    Location: Dagenham Essex

    Posts: 8,202
    I'm I'mteachingmarcotheartofpishanto.


    Send it back via the dealer you got it from , I should not hum / vibrate
    Music , fills the gaps between silence !

    TAT Sale post Leader " Marcos Mentor "

    Also a pishanto specialist confirmed by Head Daftee

    Real name " Allen " or "Zoomer Nut”, “Numpty Napper”.


  6. #6
    Join Date: Dec 2011

    Location: sussex

    Posts: 230
    I'm phil.


    I've got a psu on my angle audio phono stage and there is no hum, don't think psu should hum at all at normal levels.
    Technics 1200, Ian Mac bearing, rb300 AO arm analogue seduction crystal glass 6mm mat modded plinth external psu, angle audio studio pro mc virtual battery phono amp, Onix pre and mono amps, Onix CD player, Onix BWD and soap tuner. B&W dm2 speakers or super pencil 12 speakers, atlas cables, seperate mains power supply with earth spike.

  7. #7
    Join Date: Aug 2008

    Location: Suffolk, UK

    Posts: 1,338
    I'm Paul.


    All transformers vibrate to some extent. Sometimes you can be unlucky and 50 hz happens to be the natural resonance of something else in the enclosure, or something is just loose. Sometimes transformers hum if there is a short and more current than there should be is being drawn. Chances it just needs a service and a few of the fasteners inside tightening up.

  8. #8
    Join Date: Jun 2011

    Location: Skien, Norway

    Posts: 905
    I'm Jostein.


    This might be some DC offset on your mains that makes this noise and causes the PSU to hum. You can check if a DC blocker helps here.
    My hifi system:

    Turntable: Technics SL-1200 MKII, Ortofon 2M Bronze cartridge, Mike New bearing, MCRU PSU (c), Oyaide HS-CF headshell, Oyaide MJ-12 TT mat, Vantage Audio Copper mat, Isonoe Isolation Feet, Isodek IF-2 isolation platform, Furutech Monza LP stabilizer, Herbie's Hal-O JR damper Phono Stage: Hagerman Cornet 3 (prototype) Amplifiers: EAR 868L Preamp, Transcription Audio 211 Heaven Power amp, Bob Carver Cherry 180 power amp CD Player: Ear Yoshino Acute Tuner: Magnum Dynalab 90T Speakers: Vandersteen 2CE SigII, Townshend Audio Super Tweeters, Transcription Audio Speakers Cables and stuff: LFD Audio interconnects and speaker cables, Mark Grant G2000HD, BlackCat Electronics, Van Den Hul Clearwater, Black Rhodium mains cables, Black Rhodium mains block, Finite Elements Resonator, Townhsend Stella Speaker stands, Pro Audio Bono hifi rack, Herbie's spike gliders, Herbie's Ultravox and Hal-O tube dampers, Super Black Hole CD mat Record Cleaning Machine: Loricraft PRC4

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