Noisey tube pre

Goth child
Goth child Posts: 38
edited November 2009 in 2 Channel Audio
Need some help guys!
Heres my system.
ATI At3000 2 channel power amp.
YS Audio Balanced a2SE tube pre.
Sony sacdx5400es cd player.
A1 dreadnaught.
Monster Hts1650 console.
Polk Audio SRS 1.2tl Rdo tweeters,no crossover upgrade.....yet.
Belkin high current power cables.
Wireworld Eclipse3 bi wired speaker cables.
Wireworld Eclipse3 balanced inter connects.

I have 2 small issues with my YS Audio Balanced A2 SE pre amp.
Firstly there is an audible hiss coming from the tweeters on my SRS1.2tls.
The hiss is in both channels and gets louder as I turn the volume up.
Secondly if I hold the volume control with my hand I can hear random radio stations faintly through the speakers!This is also both channels and gets louder as I turn the volume up.
Theres no faults with the pre switched off.The fault is on all inputs,EXCEPT the processor pass thru(Im assuming this bypasses the pres volume pot?)
Switching interconnects etc doesnt eliminate the problems.Im guessing its something to do with the volume pot???
Post edited by Goth child on
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Comments

  • Ricardo
    Ricardo Posts: 10,636
    edited November 2009
    Have you tried a different set of tubes? I owned that pre and I can say it's the quietest tubed pre I've ever owned.
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  • Goth child
    Goth child Posts: 38
    edited November 2009
    Ricardo wrote: »
    Have you tried a different set of tubes? I owned that pre and I can say it's the quietest tubed pre I've ever owned.

    The pre is stock standard.I moved to a new town about 6 months ago and left everything packaged up while I was waiting for my Dreadnaught parts to arrive from the USA.It was about 3months before everything got set back up.The pre was much quieter and definately didnt pick up radio stations as background noise!
    As a side note what did you replace your A2Se with?
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  • Ricardo
    Ricardo Posts: 10,636
    edited November 2009
    Ok. If it didn't have the problem before, maybe it's related to the power in your new home? Did you make any other change that could be a probable cause?

    I replaced mine with a BAT VK-5i
    _________________________________________________
    ***\\\\\........................... My Audio Journey ............................./////***

    2008 & 2010 Football Pool WINNER
    SOPA
    Thank God for different opinions. Imagine the world if we all wanted the same woman
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  • Goth child
    Goth child Posts: 38
    edited November 2009
    I have tried it at another location and it is still noisey.Why does it get radio stations when I hold the volume pot?
    Someone told me the volume pot might not be grounded properly.
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  • TroyD
    TroyD Posts: 13,077
    edited November 2009
    sounds like a ground loop issue.

    BDT
    I plan for the future. - F1Nut
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  • RuSsMaN
    RuSsMaN Posts: 17,987
    edited November 2009
    It's a hiss not a hum big dumb.

    Change the tubes out.
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • disneyjoe7
    disneyjoe7 Posts: 11,435
    edited November 2009
    Could it be just a loose tube, since it makes noise since he move it?

    Speakers
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    CS400i Center
    RT800i's Rears
    Sub Paradigm Servo 15

    Electronics
    Conrad Johnson PV-5 pre-amp
    Parasound Halo A23
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  • RuSsMaN
    RuSsMaN Posts: 17,987
    edited November 2009
    All tubes exhibit microphonics, some more than others. He also just moved, box could have been bumped, dropped, bounced around, whatever.

    I'd start with the tubes, I've picked up the local am news radio station on a preamp before.

    Cheers,
    Russ
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • Systems
    Systems Posts: 14,873
    edited November 2009
    Tubes
    Testing
    Testing
    Testing
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  • markmarc
    markmarc Posts: 2,309
    edited November 2009
    Start with the simplest solution first:

    Put on your tube gloves and re-seat all your tubes.
    Review Site_ (((AudioPursuit)))
    Founder/Publisher Affordable$$Audio 2006-13.
    Former Staff Member TONEAudio
    2 Ch. System
    Amplifiers: Parasound Halo P6 pre, Vista Audio i34, Peachtree amp500, Adcom GFP-565 GFA-535ii, 545ii, 555ii
    Digital: SimAudio HAD230 DAC, iMac 20in/Amarra,
    Speakers: Paradigm Performa F75, Magnepan .7, Totem Model 1's, ACI Emerald XL, Celestion Si Stands. Totem Dreamcatcher sub
    Analog: Technics SL-J2 w/Pickering 3000D, SimAudio LP5.3 phono pre
    Cable/Wires: Cardas, AudioArt, Shunyata Venom 3
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  • Goth child
    Goth child Posts: 38
    edited November 2009
    markmarc wrote: »
    Start with the simplest solution first:

    Put on your tube gloves and re-seat all your tubes.

    Ok.So I have lifted the lid and made sure the tubes are all tightly in place.I dont really know what Im doing ,so Im assuming thats what you mean by re seat?
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  • Systems
    Systems Posts: 14,873
    edited November 2009
    Look at them all you want. Make sure they are all glowing. Make sure they have clean pins. Do whatever you want to THOSE tubes. Then try a new set. 12AT7's are easily found everywhere. Get some good ones like the British Military / Mullard's I have in my closet. I'm out of the Russian ones. LOL
    Testing
    Testing
    Testing
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