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Thread: mains Voltage

  1. #1
    Join Date: Aug 2012

    Location: North

    Posts: 2,473
    I'm Steve.

    Smile mains Voltage

    We recently had a new substation installed in the village and a lot of the overhead cables updated/replaced. since then i have noticed that the power supply for my pre-amp has become noisy and replaced quite a few light bulbs. I didn't think about the mains voltage until i recently bought a headphone amp and it was humming like a b......d. I contacted the manufacturer of the headphone amplifier who after some debate suggested that i had my mains voltage checked by a fully qualified electrician which i did. It was discovered that my mains voltage is running at 247 volts which is getting on towards the top end of the recommended voltage. I contacted the appropriate agency to discuss the matter and was told that it was in the range and therefore nothing could be done to lower the voltage by them to my property. With this in mind i contacted the electrician who informed me that the only thing he could suggest was wiring in an Optimisier on my distribution board in the garage. This would cost about 500 which is a lot of money. Any suggestions chaps?
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  2. #2
    Join Date: Oct 2012

    Location: NE England

    Posts: 4,647
    I'm Jez.

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    Nowt wrong with 247 and it will probably vary a fair bit from day to day. As low as 230 and high as 250 is not unusual at all and mains will often vary this much on a daily basis.

  3. #3
    Join Date: Sep 2011

    Location: Kilmarnock, Ayrshire, Scotland

    Posts: 294
    I'm stuart.

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    One of these, seen them for sale for as little as 125. It'll supply everything except your power amp.

    http://www.powerinspired.com/ag500-a...ol-p-1811.html

  4. #4
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 36,583
    I'm Grant.

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    Quote Originally Posted by killie99 View Post
    One of these, seen them for sale for as little as 125. It'll supply everything except your power amp.

    http://www.powerinspired.com/ag500-a...ol-p-1811.html
    thats the one ive got. works well
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
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    DENON DV2900 - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP - AVANTREE OASIS CLASS 1 BLUETOOTH - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10 JRIVER23, SPOTIFY PREMIUM - ECHO DOT - SMSL M6 MINIDAC - FULL RANGE TWIN TELEFUNKEN's - Q ACOUSTIC BT3 actives - CANTON SUB - MAINS REGENERATED AND FILTERED.

  5. #5
    Join Date: May 2012

    Location: London

    Posts: 383
    I'm Spartacus.

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    Quote Originally Posted by killie99 View Post
    One of these, seen them for sale for as little as 125. It'll supply everything except your power amp.

    http://www.powerinspired.com/ag500-a...ol-p-1811.html
    I run all my amps + active sub through my AG1500 without any issues. But then all my amps are 10-16W except for my Croft S7 and that's also fine.

  6. #6
    Join Date: Feb 2017

    Location: Sussex

    Posts: 324
    I'm Simon.

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    Id try one of the slightly better power inspired regenerators which I've heard people say who live in villages or rural locations, are very good. I think it was the ag1500 regenerator he was saying was very good. Depends on your system mind. I'm trying a conditioner at the moment and started a seperate thread on this. An isol-8 minisub axis. But I've no idea if a conditioner would do the same job if the mains voltage is high and their is him. Only one way to find out - Try various devices at home.

  7. #7
    Join Date: Aug 2009

    Location: Staffordshire, England

    Posts: 17,840
    I'm Martin.

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    I'd send the headphone amp back and and get a refund. It shouldn't buzz just because the mains is a bit higher than optimal.
    Martin



    Current Lash Up:

    Sony X505ES CD Player * NVA P90SA passive pre / Krell KSA50S Power amp * JM Lab Electra 926 loudspeakers *



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  8. #8
    Join Date: Jan 2009

    Location: Essex

    Posts: 16,103
    I'm openingabottleofwine.

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    Quote Originally Posted by Macca View Post
    I'd send the headphone amp back and and get a refund. It shouldn't buzz just because the mains is a bit higher than optimal.
    Agree - any competently designed piece of kit ought to operate without problem when connected to the UK mains supply.
    Have you listened to this month's choice in the Album Club?

    Barry

  9. #9
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,264
    I'm Alan.

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    UK mains is 230VAC + 10% - 6%
    216.2 - 253VAC so nowt we can do about it mine has been as high as 253V as well but recently is around the 230VAC
    Mains regeneration could be a good idea ?.
    IMO Don't but anything with a 220v transformer they buzz like shi% for me

    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

  10. #10
    Join Date: Apr 2008

    Location: east yorkshire

    Posts: 504
    I'm steve.

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    I worked in the pub trade, many 24 volt bar transformers buzzed, we could swap one out and it cured it, it was only down to poor quality windings that vibrated.
    I agree that anything sold in this country should be up to working on the mains voltage that is specced, but its far cheaper for them to suggest you spend money that may stop the buzzing than replace the faulty item
    Best of luck...
    collector and DIY user of old british triode valves

    Open baffles / single ended diy px4 and px25 valve amps

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