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UNPLANNED DOWNTIME: 12th Oct 23:45

New Valves Needed?

IvisonGuitarsIvisonGuitars Frets: 6806
edited October 2013 in Amps tFB Trader
Do the assembled gentlemen recognise this and should I be sourcing a pair of new 6L6's?

image
http://www.ivisonguitars.com
(formerly miserneil)
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Comments

  • ICBMICBM Frets: 69426
    Yes, and no.

    Beautiful blue glow!

    Ignore anything you may have read about this type of glow being a sign of bad valves, it's the exact opposite. I really have no idea where that myth came from.

    "Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski

    "Just because I don't care, doesn't mean I don't understand." - Homer Simpson

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  • IvisonGuitarsIvisonGuitars Frets: 6806
    tFB Trader
    Thanks @ICBM, that's good enough for me! :-)
    http://www.ivisonguitars.com
    (formerly miserneil)
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  • ICBMICBM Frets: 69426
    edited October 2013
    I probably should have said that it doesn't guarantee the valves are good - there can be other problems that don't show - just that by itself it indicates a valve with a good vacuum that's working correctly. The blue glow is actually caused by fluorescent minerals in the glass being bombarded by stray electrons.

    There is also a fainter blue glow inside the plate structure which indicates a tiny amount of gas in the valve and is also normal, but if it's excessive it can mean there's a problem.

    Pink or purple glow is always a problem and usually means the valve has seconds to live!

    "Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski

    "Just because I don't care, doesn't mean I don't understand." - Homer Simpson

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  • Van_HaydenVan_Hayden Frets: 434
    Yep, I concur...

    Get a pair of Chinese KT66 and watch a miniature version of the northern lights.

    I shouldn't worry, but I'd always have a spare set to hand.
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  • IvisonGuitarsIvisonGuitars Frets: 6806
    edited October 2013 tFB Trader
    Thanks @Van_Hayden, i'm going to get a set just in case. They've been in the amp since I purchased it 2nd hand (and I believe from new) so it's worth having a set in stock :-)
    http://www.ivisonguitars.com
    (formerly miserneil)
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  • hotpickupshotpickups Frets: 1790
    What valves are you going for, for spares Neil ?
    miserneil;52618" said:
    Thanks @Van_Hayden, i'm going to get a set just in case. They've been in the amp since I purchased it 2nd hand (and I believe from new) so it's worth having a set in stock :-)
    Link to my trading feedback:  http://www.thefretboard.co.uk/discussion/59452/
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  • Drew_TNBDDrew_TNBD Frets: 22443
    Aye. Some blueness is fine. It's when they're boiling red that you've gotta watch out!!
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