Blues Junior Possible issue?

Discussion in 'Amp Input - Normal or Bright' started by Cyberi4n, Oct 22, 2020.

  1. Cyberi4n

    Cyberi4n Strat-Talker

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    I purchased a Fender Blues Junior Laquered Tweed about three months ago. New, so it’s under warranty, but from a reputable store some 200 miles away (online purchase).

    recently, it’s started making a loud ‘bang’ when it powers up. Only once, about 30 seconds after I hit the on switch.

    All tubes glow
    Volume when playing isn’t noticeably less than normal.
    Pedal board is plugged in but NOT powered
    Master Volume on 2

    is this normal? Anything to worry about?
     
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  2. jwj1701

    jwj1701 Strat-O-Master Silver Member

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    That is not normal. I’d call the dealer.
     
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  3. Seamus OReally

    Seamus OReally Buried alive in the blues Gold Supporting Member

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    Yeah, that ain't right. I'd call the store pronto.
     
  4. Triple Jim

    Triple Jim Guy Who Likes to Play Guitar Silver Member

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    I'd try it without the board plugged in just to eliminate that.
     
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  5. Cyberi4n

    Cyberi4n Strat-Talker

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    Yeah I’ll try tomorrow with JUST a guitar cable - also with the volume turned off as well.

    I’ll also make a short video to send to the retailer. They seem to have a decent returns/warranty policy
     
  6. CadillacBob

    CadillacBob Strat-Talk Member Silver Member

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    Ya I have the same model and it definitely doesn't do that - for sure take it back or find out what the issue is.
    It would be interesting to find out what causes the bang though
     
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  7. Triple Jim

    Triple Jim Guy Who Likes to Play Guitar Silver Member

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    If you're trying to eliminate everything except the amp, have nothing plugged in to it. An amp shouldn't make a loud pop when it warms up, just because the volume is up though.
     
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  8. Cyberi4n

    Cyberi4n Strat-Talker

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    So even with the volume off it pops. A look at the back shows that both power tubes glow. The first of three preamp tubes glows until the ‘pop’ at which point the other two come on, albeit very poorly lit, as you can see below

    42EB14ED-7426-4F0F-8296-944583F2DB2D.jpeg
    I’ve raised a support ticket with the retailer in any case. I suspect this one will be going back
     
  9. himijendrix

    himijendrix Senior Stratmaster

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    I have a Blues Junior III no problems with it as yet. Certainly no 'bang' during warmup.

    The three preamp tubes on mine all light up together with the two power tubes. If anything, the preamp tubes glow a little brighter than the power tubes. I hope that provides a little more evidence.
     
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  10. Cyberi4n

    Cyberi4n Strat-Talker

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    Here’s the issue, recreated by the glory that is YouTube

     
  11. Triple Jim

    Triple Jim Guy Who Likes to Play Guitar Silver Member

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    That's definitely not normal. If removing and putting each tube back in doesn't change it, I'd swap in spare tubes one at a time to see if one of the originals is bad.

    Or show this video to someone at the store you got if from to see what he offers to do.
     
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  12. little_wing142

    little_wing142 Senior Stratmaster

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    My 1999 BJr has been very finicky, but is to be expected with the early ones. I’ve likely spent +$1000 on repairs in the last 21 years of ownership. I don’t mind though because the sound is my voice.
     
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  13. fos1

    fos1 Strat-O-Master Silver Member

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    Ouch. Something is amiss.
     
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  14. Cyberi4n

    Cyberi4n Strat-Talker

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    Further update:

    unplugging the reverb tray/tank rectifies the issue.

    Obviously it’s not ideal as one of the reasons for having a Blues Junior is the lush reverb!

    Although it’s got to go back at least it’s nothing to do with the tubes!!
     
    Last edited: Oct 26, 2020
  15. nirvana73

    nirvana73 New Member!

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    [QUOTE = "Cyberi4n, post: 4100199, member: 73457"] Ho acquistato una Fender Blues Junior Laquered Tweed circa tre mesi fa. Nuovo, quindi è in garanzia, ma da un negozio rispettabile a circa 200 miglia di distanza (acquisto online).

    recentemente, ha iniziato a emettere un forte "scoppio" quando si accende. Solo una volta, circa 30 secondi dopo aver premuto l'interruttore di accensione.

    Tutti i tubi si illuminano
    Il volume durante la riproduzione non è notevolmente inferiore al normale.
    La pedaliera è collegata ma NON alimentata
    Master Volume su 2

    è normale? C'è qualcosa di cui preoccuparsi? [/ QUOTE]

    Hi I wanted to ask, if your BJ also has background noise, like hummmm when you turn it on. You can hear if there is silence but to register a little annoyance ...
    I wanted to know if this is normal!
    Thanks a lot.
     
  16. nirvana73

    nirvana73 New Member!

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    [QUOTE = "CadillacBob, post: 4100268, member: 76609"] Sì, ho lo stesso modello e sicuramente non lo fa - di sicuro riprendilo o scopri qual è il problema.
    Sarebbe interessante scoprire cosa causa il botto però [/ QUOTE]

    Hi I wanted to ask, if your BJ also has background noise, like hummmm when you turn it on. You can hear if there is silence but to register a little annoyance ...
    I wanted to know if this is normal!
    Thanks a lot.
     
  17. nirvana73

    nirvana73 New Member!

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    [QUOTE = "himijendrix, post: 4100914, member: 28024"] Ho ancora un Blues Junior III senza problemi. Certamente nessun "botto" durante il riscaldamento.

    Le tre valvole del preamplificatore sulla mia si accendono tutte insieme alle due valvole di potenza. Se non altro, le valvole del preamplificatore brillano un po 'più luminose delle valvole di potenza. Spero che questo fornisca qualche prova in più. [/ QUOTE]

    Hi I wanted to ask, if your BJ also has background noise, like hummmm when you turn it on. You can hear if there is silence but to register a little annoyance ...
    I wanted to know if this is normal!
    Thanks a lot.