Please Help Me - VOX AC15Hw

Discussion in 'Amps and Cabs' started by Resonate01, Apr 19, 2017.

  1. Resonate01

    Resonate01 Member

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    Just need help trying to figure out what's wrong with my amp.

    A couple weeks ago I bought a Vox AC15HW used, tried it at his house, sounds great. I brought it home and tried it with my rig, the next day at church I noticed some buzzing and quite a bit of noise. After about a week playing around with it, I notice some noise in behind my playing (egg frying noise) and volume jumps. It got worse as I added gain.

    Naturally, the first thing I did was change the tubes. I had a few extra power tubes that I put in the amp, and also added some brand new tung sols in the preamp section, as well as an older sovtek lps for v3, which I had lying around for a while.

    With the tube change, amps sounds really good. No noticeable volume jumps, but I still hear the background noise behind my playing. Everytime I strike a note, I hear the amp buzz a little bit. It's not really noticeable playing clean, but as I add gain stages with my pedals, it seems to get louder and more obnoxious.

    Could it be one of the older tubes? Or maybe something else? I don't really know where to start to be honest.

    Oh, also I tried with and without my pedals in the chain, didn't make a difference in noise.
     
  2. Guinness Lad

    Guinness Lad Silver Supporting Member

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    Gain will add noise, regarding the noise if you have a blue you are now amplifying a lot more high than before. It's possible especially if you attack the notes hard that the buzzing is fret rattle. The speaker is now amplifying this noise, I think you should make sure it's not your guitar and/or playing.
     
  3. GuitarArt1980

    GuitarArt1980 Member

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    I had a similar issue with a used ac15hw i bought a few years ago. Turns out it was a bad volume pot that needed replaced. Is the noise there on both the top boost and normal channels? Either way, I'd take it to a tech
     
  4. TheWayfarer84

    TheWayfarer84 Silver Supporting Member

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  5. ken374

    ken374 Member

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    I know the hot switch channel has a lot of hiss when I had one
     

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