(Note: As coderjames points out this could be dangerous tinkering. There is typically steady-state noise at 125MHz from Ethernet so it's not that we're putting more energy into the spectrum with this, but adding signal in the form of morse code could draw a lot of attention/distraction to pilots and ATC in the area.)
FWIW very brief example of 125MHz tone loss when going to 10MHz demonstrated here when my slow internet gets done uploading:
(Unpleasant sound warning)