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JJ Tubes And Amplifier Warm Up

Discussion in 'Ampage Area' started by ZackyDog, Jul 16, 2017.

  1. ZackyDog

    ZackyDog Country Gent

    Feb 6, 2015
    In the USA
    Hello To All:

    I hope that you are enjoying the tail end of your weekend. :)

    Does anyone use JJ tubes and notice that the best sounds seem to come at 12-15 minutes, after the amp has warmed up?

  2. dilver

    dilver Country Gent

    Feb 16, 2009
    That's kinda the case with all tubes and tube amps, isn't it?
    Mudshark and wabash slim like this.
  3. wabash slim

    wabash slim Country Gent

    Feb 10, 2010
    lafayette in
    Let them cool down as well when you're done before you move them, especially in cold weather. Filaments are brittle and jostling them around isn't a great idea. Anything with tubes need a warm up period---it's the nature of the beast---6.3 volt filaments make the electrons flow, and the magic happen.
  4. drrohle

    drrohle Synchromatic

    Jan 3, 2014
    Hays, KS
    If you amp doesn't sound the same after 15 min. of operation you probably have a bad tube somewhere. I've seen the emission fall off many a tube in my tube tester after being under a load for a few minutes.
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  5. Mudshark

    Mudshark Gretschie

    Jul 20, 2012
    I think it depends on the amp topology, especially if it has a rectifier. My Tweed clone definitely sounds better after it get nice an warmed up, a bloom develops. My MESA 5:25 with SS rectifier not as much. I think tubes with rectifiers have more bloom due to the circuitry and sound better nice an warm. - muddy
    Last edited: Jul 16, 2017
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  6. ZackyDog

    ZackyDog Country Gent

    Feb 6, 2015
    In the USA
    Thanks for your responses, but I was just seeing if anyone else noticed that JJs need some warm up time before they sound their best.
  7. Ricochet

    Ricochet Gretschified

    Nov 13, 2009
    Monkey Island
    As I understand it, the JJs can withstand higher plate voltages compared to other modern makes, so it stands to reason they take a bit longer to warm up?
    ZackyDog likes this.
  8. Tony65x55

    Tony65x55 Friend of Fred

    Sep 23, 2011
    The 'Shwa, Ontario, Canada
    I use JJ 6v6 is all my amps that use 6V6 tubes. I hadn't noticed it but will watch for it.
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  9. ZackyDog

    ZackyDog Country Gent

    Feb 6, 2015
    In the USA
    Yes, I forgot about that and it makes sense.
  10. Stefan

    Stefan Country Gent

    Jan 20, 2016
    I guess most tubes needs a more or less long warm up, but that's usually just a minute. I've also got JJ's in my Swart but after this warm up I can't hear any difference.
  11. ZackyDog

    ZackyDog Country Gent

    Feb 6, 2015
    In the USA
    Well, as rule of thumb, I don't turn up the guitar volume until the amp has warmed up at least a couple of minutes.
  12. Robbie

    Robbie Country Gent

    Jun 17, 2013
    Sarnia Ontario Canada
    I can't say I've noticed JJ's take any longer to warm up than other brands.
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  13. stevo

    stevo Country Gent

    May 1, 2012
    Always that way for me no matter the tubes. JJs have been no different for me.
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  14. Stefan

    Stefan Country Gent

    Jan 20, 2016
    Usually I switch on Power and after 30 seconds or maybe a minute standby.
  15. rockinforJesus

    rockinforJesus Gretschie

    Nov 7, 2014
    Upstate New York
  16. loudnlousy

    loudnlousy Country Gent

    Oct 18, 2015
    Hildesheim, Germany
    I got two amps of the same model. One is outfitted with JJs ond with TADs. Both take their time to warm up and yes, they sound both different after a few minutes. That`s why I always fire up my amp long before plugging in my guitar.
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