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Thread: New Tascam 388 headphones crackling

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    New Tascam 388 headphones crackling

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    Hi All,
    My Tascam 388 that I just bought a week ago is working well. All tracks sound great, etc.
    The only problem is the headphones are crackling and popping. The sound doesn't effect the recorded tracks but is very annoying. Both headphone jacks have the same problem. I tried different headphones but the sound remains. Sometimes it gets REALLY loud for a few seconds.
    Any ideas what this might be an how to cure it?
    Thanks Guys!

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    This happened to the 2nd 388 I bought.
    It turned out to be the capstan motor. It was bad.
    I had a spare and replaced it and the noise went away.
    This might not be your problem, so I'm not sure.
    Do you hear this noise when you wear phones and
    Set the capstan spinning by lifting the right tension arm without tape?
    We've got bush,We've got bush!!!

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    Thanks j.harv,
    It happens even when nothing is playing or spinning.
    I'm thinking its the headphone inputs. Maybe dirty? but why both?
    Do you think it could still be the capstan motor if its crackling even when nothing is happening?

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    I suspect something in the headphone amp circuitry but couldn't tell you what.

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    Probably not the motor then. My headphones would snap,crackle,pop when the capstan started spinning.And the motor was making an audible noise too. A lot louder than the quiet whirring noise it usually makes. I pulled it and spun it by hand and it almost felt like there was sand in it. This noise was getting fed into the rest of the circuitry.
    We've got bush,We've got bush!!!

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    Do you think I should spray some contact spray into the headphone input jack, or would I have to open this thing up in an effort to reduce the crackle?

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    I suspect there is a failing component on the headphone amp PCB, which is located underneath the transport control panel. I don't think contact cleaner will help bit it won't hurt either.

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    ah. too bad. I was thinking about taking it to Tascam in Montebello to see how much they might charge. Any guess?

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    No clue, and you'd want to call first to see if they can do it. I don't know who they have there in analog support now...I just know that the two analog gurus that were there forever are long gone unfortunately.

    Can anybody comment on what type of component failure might typically cause that sort of intermittent crackling in an opamp-based audio amplifier circuit? I'm thinking electrolytic coupling cap or transistor (which would include theoretical transistors within the opamp)...

    Magnum does the crackling change depending on how hot the signal is to the headphones? Like if you crank it does it make the crackling worse or does make it better? Or is it just totally random?

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    We've got bush,We've got bush!!!

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