BG7TBL filter power ratings?

[Ultrapurple]

Hi all

New to this section, not new to EEVblog.

Has any one found any info on the power ratings for those very nice metal-cased filters by BG7TBL? I'm using a 50MHz version on the output of a Chinesium 3W square wave generator RF amplifier for a WSPR transmitter and it works very nicely, but pointing a thermal camera at the beastie's internals shows that the inductors are warming at a quarter of that power level (the input attenuator in the image was 6dB). To be fair, the filter is removing a significant amount of unwantedness and that power has to go somewhere. But I don't want to pop the filter, as I'm generally pretty impressed with its performance

So, any ideas on the actual power dissipation limit? Are there any published specs?

Thoughts welcome.