The power required to do it is impressive to say the least.
That’s not how the attack worked. He didn’t drown out the tower. He simply overrode the the studio-to-transmitter link signal. The studios used microwave line-of-sight transmitters to communicate a signal from the studio to the tower. All the attacker had to do was override that signal. That signal was 50W max. You could override it with maybe 200W as long as you were also in line-of-sight of the microwave receiver. Probably less since some microwave trasmitters were as weak as 1W. They don’t need to be strong since they are line-of-sight directional transmitters. So, that’s not particularly impressive.
That’s not how the attack worked. He didn’t drown out the tower. He simply overrode the the studio-to-transmitter link signal. The studios used microwave line-of-sight transmitters to communicate a signal from the studio to the tower. All the attacker had to do was override that signal. That signal was 50W max. You could override it with maybe 200W as long as you were also in line-of-sight of the microwave receiver. Probably less since some microwave trasmitters were as weak as 1W. They don’t need to be strong since they are line-of-sight directional transmitters. So, that’s not particularly impressive.
Although, having to get a transmitter within line-of-sight makes the overall feat more impressive.