Yeah, there are still a fair number of amateur radio operators using tube transmitters, up to 1,500 watts. Not as big as some of the commercial radio transmitters, but still powerful enough that operators are required by the FCC to do assessments of the RF output of their rigs to insure it doesn’t exceed the maximum permissible exposure limit for people in the vicinity of the equipment or antennas. The MPE limit varies by frequency.
The old tube gear can be heavy and bulky. There is a ham radio Facebook group specifically for tube powered “boat anchors”.
