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Weird static pops while playing w/Mesa D800

Discussion in 'Amps and Cabs [BG]' started by Crusher47, Feb 12, 2018.


  1. Crusher47

    Crusher47 Tattoo'ed Freak Supporting Member

    Apr 12, 2014
    Fort Worth, TX
    Ok I'm getting these weird, intermittent static pops while playing thru my Mesa D800 w/6x10 Mesa cabinet. I noticed it's only using a couple of my Fender Jazz basses. It doesn't seem to happen with a P or my G&L Jazz.
    Seems like it's only when fretting certain notes as well. I tried to record it but can't get a clear recording of it.

    I'm running thru a few pedals, so I disconnected it all and just went straight bass to amp with a cable. Also tried 2 different cables, still does it. I don't have time to keep messing with it and getting frustrated, I guess my next step would be trying a different cab to rule out the 6x10. Figured I would ask here if someone has experienced this before. Sound is almost like when you have static on your body then you touch something metal, you get that little pop. It's kind of like that, not very loud but it is annoying.

    Thanks in advance
     
  2. I'll take a few shots...
    Static electricity?
    Is you bridge grounded?
    How's your humidity?
    Are you on carpet? If so, spray a little fabric softener on the rug.
    Loose connectors?
    Handling noise in the cable? (I know you tried a different cable but was it a different type of cable?)
    Try a different locations?
    All out of bullets. Good luck.
     
    agedhorse and Crusher47 like this.
  3. Stumbo

    Stumbo Wherever you go, there you are. Supporting Member Commercial User

    Feb 11, 2008
    Intergalactic Mind Space
    Song Surgeon sofware
    Try it with headphones.
     
    Crusher47 and Old Garage-Bander like this.
  4. It ain't strings hitting yr pole pieces is it?
     
  5. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa, Product Support-Genz Benz
    Static electricity is the most common cause. The amp is specifically protected against damage due to static discharge because it's that common.

    If the bridge isn't solidly grounded, the static voltage won't bleed off and will become high enough to arc to ground through a bad connection.
     
  6. Crusher47

    Crusher47 Tattoo'ed Freak Supporting Member

    Apr 12, 2014
    Fort Worth, TX
    Thanks everyone... it has been very dry and cold here lately so I tend to agree that it is more than likely static electricity due to low humidity and I'm also willing to bet the worst offending bass is not shielded. I will try and mess around with it more later today and try to get a definite answer.
     
    Spidey2112 likes this.
  7. Spidey2112

    Spidey2112

    Aug 3, 2016
    Just the noise, or did you also feel it? Didn't notice this using those particular basses before?
     
    Crusher47 likes this.
  8. Shielding alone will not necessarily prevent noise that is due to static electricity. Shielding protects against EMI/RFI radiating into the electronics.
    Nor will being grounded always prevent it. You can build up a static charge and touch a grounded object and still have an electrostatic discharge.

    If it is static electricity, you need to solve it at the source, which means increasing humidity, or using some sort of static prevention like fabric softener sprayed on a carpet, or wear an anti static wrist strap that is grounded and keeps static from building up on your body. Of course, for safety reasons, the electrical system where you play must be in proper working order and up to code. This is especially so if you plan to use a wrist strap.

    These straps are designed to be used by people who work on sensitive electronic equipment. They help prevent a static discharge that could easily damage components. The concern, in your case, is more about preventing the noise of static discharge rather than to protect equipment.

    It may not be practical to wear a wrist strap while playing, so I offer it only as a last resort. Though it should be just as effective on your ankle, provided it does not present a trip hazard for you.

    I've used wrist straps at work. Also, when I worked in a dry climate around electronic equipment, we would use a diluted solution of liquid fabric softener to spray the carpeted areas. We did this once a week. These things work pretty well. But your best bet is to try to get the humidity up where you are, if possible.

    https://www.amazon.com/Vastar-Anti-...-spons&keywords=anti-static+wrist+strap&psc=1
     
    Last edited: Feb 13, 2018
    Crusher47 likes this.
  9. basscooker

    basscooker Commercial User

    Apr 11, 2010
    cincy ky
    Owner, Chopshopamps.com
    Tangent and off topic

    When I was working in EM assembly, wrist straps were required. One meeting we had with the lead engineer was about ESD. Now if I'm remembering correctly it is extremely low current, but really high voltage... Like 1000's of volts. The handouts had some figure like 3500 volts is where the average person can feel ESD, and there can be entire PCBs ruined from discharges we can't even feel.

    Is this correct, or is my memory that bad? Or were we fed a line?
     
  10. Crusher47

    Crusher47 Tattoo'ed Freak Supporting Member

    Apr 12, 2014
    Fort Worth, TX
    Just noise, no feeling at all
     
    Spidey2112 likes this.
  11. Oldtimer

    Oldtimer Gold Supporting Member Supporting Member

    May 4, 2002
    New Mexico
    I know this may seem funny, but get a Dryer sheet and lightly rub it on the pickguard. I used to have this problem on Jazz basses and P basses when we lived in Colorado. It worked for me.
     
  12. Yep it's the high voltage that is required to jump the air gap.
     
    basscooker likes this.
  13. inanimate_carb

    inanimate_carb

    Aug 11, 2016
    I was gonna suggest the dryer sheet thing as well. It sounds too stupid to work but often does!

    I’ve also installed a fitted and cut dryer sheet between the body and the PG as well in extreme cases. Lakland pickguards seemed to have that issue a number of years ago.
     
    Old Garage-Bander likes this.
  14. Works in the dryer to reduce static so why not to help elsewhere.
    Seems like a good option for those places where you don't want to use liquid.
     
    inanimate_carb likes this.
  15. Crusher47

    Crusher47 Tattoo'ed Freak Supporting Member

    Apr 12, 2014
    Fort Worth, TX
    Dryer sheet did nothing :(
     
  16. joel406

    joel406

    Dec 27, 2013
    Florida
    D-800 or D-800+?

    I have had the D-800+ for over a year and all I use is a Jazz bass. Never had this issue.
     
  17. mesaplayer83

    mesaplayer83

    Jun 27, 2017
    D800 user here - I haven't experienced anything like that with any of my basses or cabs, including a couple of jazz basses... Try boiling some large pots of water to get some humidity in the air...
     
    Crusher47 and Spidey2112 like this.
  18. Crusher47

    Crusher47 Tattoo'ed Freak Supporting Member

    Apr 12, 2014
    Fort Worth, TX
    Update: I played the same Jazz bass thru my Ampeg V4B w/8x10 fridge and it does it running thru that setup as well, so it's not an issue with the Mesa at all. It's also doing it with another Jazz bass, but when I play a P-bass or Schecter, it doesn't do it. I'm thinking now it may either be a cable or maybe it's the carpet in the room throwing off static electricity, but why does it only happen with certain Jazz basses?
     
  19. mesaplayer83

    mesaplayer83

    Jun 27, 2017
    Maybe both Jazz basses have an issue?
     
  20. Spidey2112

    Spidey2112

    Aug 3, 2016
    Have you changed anything with them, lately? They've done this the entire time you've owned them, or just started...?

    Do you see a movie in your mind, when you blink faster than 30fps?