FM3 humming in Gemini 2

[Flobudi]

I'd start by making sure both the FM3 and the Gemini are plugged into the same outlet.

I've taken care of the basics.
The only things I haven't done yet are to use a Iso Box or use the y cable trx to trs.

 

[Flobudi]

I have the Solution. Now i use the radial sb-6 and there is no hum.

 

[Rumbletone]

I have the Solution. Now i use the radial sb-6 and there is no hum.

That’s good to hear. I always prefer a solution that doesn’t involve adding/buying gear, but it sounds like that was the right approach here and, most importantly, the problem has been solved!

 

[Flobudi]

Yes, I prefer that too. I've tried every other option over the last few weeks.
Power conditioners, all kinds of cables, grounding, separate circuits. Nothing worked.
I think the problem lies with the symmetrical output of the FM3 and the asymmetrical input of the Gemini.