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  1. #1
    Romeo Delight
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    10.09.06 @ 12:12 PM
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    Default Blew my first tube...

    I was recording a song yesterday, and my 5150 2x12 combo started making a really weird humming, almost feedback like hiss. I shut the amp down for about an hour, fired it back up, and it sounded fine for about a half hour. It started to make the noise again, so I shut the amp down again. Upon entering the soundbooth, I could smell something burning. I know very little about the electronics of an amplifier, but I assume it is a blown tube. My question to you guys here is how hard is it to change tubes? Is this work for a professional to show me how to do it for when it happens again? Also, I am open to suggestions about new tubes-the 5150 still had the stock tubes in it, and they were over a year and a half old. Thanks for the help.

  2. #2
    Banned! againstthewind's Avatar
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    I am in no way a pro, but from what I have seen replacing tubes is as easy as changing a light bulb, just plug it in right and it is ready to go. You just have to make sure you have the right tubes.

  3. #3
    Atomic Punk Eddymon's Avatar
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    Default

    You "BLEW A TUBE"?

    Which one?
    Talk To You Later.

    'Old Van Halen, when I was in it-classic Van Halen-makes you wanna drink, dance and screw, right? And the new Van Halen encourages you to drink milk, drive a Nissan and have a relationship.' - David Lee Roth.

  4. #4
    Banned! againstthewind's Avatar
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    Quote Originally Posted by Eddymon
    You "BLEW A TUBE"?

    Which one?
    Talk To You Later.

    I so, saw that coming.

  5. #5
    Atomic Punk
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    Default

    Quote Originally Posted by againstthewind
    I so, saw that coming.

    Pun intended?

    Tubes should snap right out.
    "Nothing is ever what it seems but everything is exactly what it is." - B. Banzai


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  6. #6
    Banned! againstthewind's Avatar
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    Quote Originally Posted by Axxman300
    Pun intended?

    Tubes should snap right out.

    LOL.
    Last edited by againstthewind; 04.17.06 at 02:12 PM.

  7. #7
    Top Of The World
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    08.06.08 @ 04:31 AM
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    If you actually smelled something burning, you did more than blow a tube. Its entirely possible that when/if a tube failed (depending on how it failed) a part inside the tube could have come in contact with another part, thus shorting out the circuit. These are NEVER good scenarios.

    If you actually did smell something burning coming from the amp, I'd take it to a tech instead of blindly replacing the tubes. If you only replace the tubes, the other damage would still be present and then you're likely to do more damage, especially if you play the amp hard. A blown transformer will cost you A LOT to replace and its entirely possible to fry an output transformer when a power tube goes bad.

    If you're good with a screwdriver (and the Peavey 5150 combo isn't nec. an easy amp to open up), open the amp and get a look at the circuit board. If a part is burned out, you should notice it. Resistors will often "burn through" and you'll see it all charred or snapped in two. That's actually a GOOD THING if that happened b/c a $.05 resistor is a whole lot better to replace than a $150 transformer (no wonder tech's call resistors "carbon fuses"). At least if you get a good look inside, you might be able to tell a tech what is burning and they can assess the situation a little better.

    Good luck - sorry to hear about the amp. Hope its repaired soon.

 

 

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