New Astro City Ballast light noise

[Crunch]

I've determined that the ballast marquee light in my NAC is generating monitor interference. If it's unplugged the noise is completely gone. Would re-routing the AC wires fix this, or could the ballast be shielded somehow?

I'd prefer to keep this original but if it has to be replaced by an LED solution that could be fine too.

 

[Samurai_j]

After experiencing this on my Astro and reading past forums on monitor interference, it always came down to how the cab is grounded. Look into “floating ground” I think you find a better answer than I can explain. I simply unplugged my light, because rewiring would be a PITA.

 

[Crunch]

After experiencing this on my Astro and reading past forums on monitor interference, it always came down to how the cab is grounded. Look into “floating ground” I think you find a better answer than I can explain. I simply unplugged my light, because rewiring would be a PITA.

Removing the grounding point near the PCB door on the height adustment leg removed *most* of the interference (the one that has the wire looping into field ground into the PSU), but there's still vertical waves coming from the magnetic(?) ballast at the top of the cabinet. Even after I unplugged it currently there's still some very minor interference from it just sitting up there.

I'm gonna go with a ballast bypass LED bulb and completely remove it. It's just soldering 2 wires and adding some heat shrink so not so bad. I just hope the lighting looks the same as the fluro when I'm done. I believe the original color temp was around 4000k with 815 lumens, so I grabbed a bulb with as close to those specs I could find.

This affects a lot more cabinets than NACs, too. One particularly sensitive PCB I bought from a seller said it was doing the same thing in his Egret 2s, so pretty much any cabinet that has this type of lighting ballast needs to be looked at.