Pop sound and then a fizzy buzz sound on certain notes.

Discussion in 'Glowing Bottle Tube Amp Forum' started by gobi_grey, Jan 14, 2020.

  1. gobi_grey

    gobi_grey Tele-Afflicted

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    Monoprice 5 watt, playing pretty much wide open and there was a pop sound(not real loud) and now there is a fizzy buzz type sound when hitting notes at louder volumes. It happens at the attack of the note, buzzes for a second and then stops. Sounds like a blown speaker. Still happens with other speakers.
     
  2. Wally

    Wally Telefied Ad Free Member

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    Bad tube is likely. Bad solder connection possibly. Sub some tubes in one at a time to eliminate that possibility. If that doesn’t cure the problem, it is tech time inside the amp.
     
    JayFreddy and rangercaster like this.
  3. MuddyWolf

    MuddyWolf Tele-Meister

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    I have the MP15 and like it alot. BUT... I think its questionable to be cranking the amp on ten. Even well made amps will eventually fail if pushed to the max. El cheapo chinese tube amps will fail even sooner. Yeah it sounds good. That's the death moan of tortured electronics.
     
  4. gobi_grey

    gobi_grey Tele-Afflicted

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    Yeah it was a tube. I probably should have checked that before posting but I figured it was the Chinese amp and not the good ol' american tubes. The only American made thing in the whole amp. Haha.
     
    rangercaster likes this.
  5. Wally

    Wally Telefied Ad Free Member

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    NOS? UOS with unknown usage?
     
  6. gobi_grey

    gobi_grey Tele-Afflicted

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    Uos, had them in and out of different amps, always worked fine. Figured they were good. Just glad the amp is working. It sounds great through a 10" wgs in my old radio cab.
     
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  7. Wally

    Wally Telefied Ad Free Member

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    Everything has a lifespan, ime. UOS means that one never knows where the tubes have been or what they are been subjected to.
     
    muscmp likes this.
  8. gobi_grey

    gobi_grey Tele-Afflicted

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    True. I think those actually came from a big box of tubes I picked up at a yard sale last year. Got it for just a few dollars. Quite a few grey glass 6v6 and a bunch of 12ax/u/y7's. Pretty neat score.
     
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  9. soundchaser59

    soundchaser59 Tele-Holic

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    A scorched grid resistor will do that same thing to an amp.
     
  10. muchxs

    muchxs Doctor of Teleocity

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    I build my stuff to run wide open 24/7.

    Ya just gotta know what runs hot and make it run cool. Beef up what usually blows up.

    For example the bias resistor in a stock Champ is usually a 2 watt carbon comp. The one I just built has a 10 watt ceramic type.
     
    jtcnj and Wally like this.
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