Wait time for your replacement grounded power supply.

[mmlydon]

I, like everyone else have the Humming issue.
How long have you had to wait before you received your replacement grounded power supply?

[benoit_mich]

2 months... 🙄

[gratelz31]

mine took 1.5 months to come... but what a difference ! o_O

[cbrandst]

I know this was mentioned a ton, but if you are able to ground the Spark with the USB cable to a PC, that is a decent work around while you wait. That's what I did and it worked exactly like the replacement power supply, but with the extra cable plugged in.

[kermiteffect]

I got mine 3 weeks. But still I got the same problem with the hum. My case was escalated.