[zbrozek]

_harmonics_ means more than just the first odd harmonic.

With 20 kilowatts flowing it's very believable that the comb reaches quite a ways up the spectrum. And the radiator doesn't have to be tremendously efficient or focused with that kind of input power to produce significant effects in unintentional receivers. Also remember that wiring harnesses in spacecraft are probably very long, so will be good receivers at many frequencies reaching quite low.

[VLM]

In that era, wrapped in a tube of grounded aluminum, making an excellent faraday cage.