I may have been a silly boy

Discussion in 'Amps and Cabs [BG]' started by Geezer Brown, Jul 19, 2013.

  1. Please,
    I don't need to be scolded or yelled at for what I've done...ive realized my mistake and how horrible it was.

    I left my SVT on for about 3 days.
    Not in standby, just simply on for 3 days, with the gain at 0.
    The light on the front flashes green and red, and when I take the amp out of standby, I hear a large pop and I hear no sound.

    Please, I don't need a yelling at. I just want to know what I should do, and if there is anything I can do besides take it to a tech
  2. gustobassman

    gustobassman I'm only here for the after party.. Supporting Member

    Mar 31, 2011
    Sandy Eggo
    You been a vewy baaaad boy!!! :p

    Good luck and hopefully it's cheap to fix.
  3. Hopkins

    Hopkins Supporting Member Commercial User

    Nov 17, 2010
    Houston Tx
    Owner/Builder @Hopkins Guitars
    Was it plugged into a cab?
  4. You do need to be yelled at, and surely will soon enough. :D
    I'd just take it to a good shop. They may yell at you
  5. That should not have caused any problem with the amp ....unless you had no cab connected.
    If it has a high voltage relay the coil may be too hot? Let it cool for a half hour. Even still it should be okay. What you did was nothing the amp should care less about.

    An output tube may have failed but it was going to happen if you left the amp on or not.
  6. will33


    May 22, 2006
    What happened to it other than being left on?

    With the gain turned down and nobody playing it, you could leave it for weeks like that, whether plugged into a cab or not. I've mistakenly done it ( albeit with Fenders ).

    Something else went wrong.

    Do all the tubes light up? Check all the fuses, etc.? Some amps have internal fuses in addition to the ones on the back. I do not know if an SVT has any internal fuses or not.
  7. majortoby


    Jul 2, 2009
    Tampa, Fl USA
    ^this. As long as there was a speaker connected, it should be okie-dokie. Heck, I think turning some electrics on/off is harder on the components than letting it idle for a long time.
  8. JimmyM

    JimmyM Supporting Member

    Apr 11, 2005
    Apopka, FL
    Endorsing: Yamaha, Ampeg, Line 6, EMG
    Ya, I think all you did was accelerate the inevitable demise of a power tube. Nothing that throwing a little money at it won't cure ;)
  9. paparoof


    Apr 27, 2011
    fEARful koolaid drinker
    Okay, I'll parade my ignorance and ask - why is it bad to leave it on for three days? Is it just overheating the tubes or is it more complicated than that?
  10. If it will make you feel better...yell,yell,yell,scold, scold. But you have no reason to be the recipient of either. :)
  11. And here was me thinking I'd failed Tubes101.1

    Does the output transformer suffer if no cab connected but no gain wound on? What if no cab with gain up but no signal?
  12. JimmyM

    JimmyM Supporting Member

    Apr 11, 2005
    Apopka, FL
    Endorsing: Yamaha, Ampeg, Line 6, EMG
    Well even if you're not playing it, heat is still going through the tubes all that time, so there is a bit of wear and tear. Not a big deal if the tubes are happening, but if one's marginal, it could get taken out.
  13. JimmyM

    JimmyM Supporting Member

    Apr 11, 2005
    Apopka, FL
    Endorsing: Yamaha, Ampeg, Line 6, EMG
    If there's no signal going through it or if it's in standby, the OT shouldn't be affected at all. Having said that, it's never a good idea to turn on a tube amp unless a cab's plugged in, just in case.
  14. It is not. The tubes will be cooler at idle than in use. On and off cycles are harder on tubes than being left on.
  15. hdracer


    Feb 15, 2009
    Elk River, MN.
    I left my Bassman on for a whole weekend once (Friday night after band practice until Monday night). It was on mute , gain on 6 master on 8. It was fine. I may have shortened the life of tubes a little is all. I have left it on standby for days too.
  16. Slough Feg Bass

    Slough Feg Bass Supporting Member

    Sep 28, 2007
    San Francisco
    my guitar player does that all the time. we'll practice on monday, then when we go to load out on friday his amp is still on. Doesn't seem to harm it one bit, and he's been doin it for years !
  17. Careful there Jimmy, if the amp's first speaker jack is a shorting jack and functioning properly, yes (Ampeg and Fender use shorting jacks as an example). If the shorting contacts fail or if it has no shorting jack the repair can be very expensive.
  18. will33


    May 22, 2006
    Nothing is bad about it, assuming that's all that happened.

    Actually, when we get a new tube amp, or put new tubes in one, we leave them on at least overnight, oftentimes longer, and they usually sound better afterwards. They need to "cook" for a while. :)

    Some of that^^ may be a wives tale. I think they sound better when you come back and play them. It could certainly be an ear trick, but it certainly doesn't hurt them. Again, assuming that's all that happened.
  19. Lo-E


    Dec 19, 2009
    Brooklyn, NY
    If there's no signal, the OT should be fine even with no cab connected - not that I'm recommending ever, ever, EVER (there's your yelling. feel better?) doing that. Even with the gain cranked, you would be fine with no cab as long as there's no input signal. But really, don't do this.
  20. JimmyM

    JimmyM Supporting Member

    Apr 11, 2005
    Apopka, FL
    Endorsing: Yamaha, Ampeg, Line 6, EMG
    Even if there's no signal going through the input or it's on standby?