Oh no, I remember this. The Pi's output pin causes harmonics so the consequences would be so bad. Every article, including this one, that talks about using the

Oh no, I remember this. The Pi's output pin causes harmonics so the consequences would be so bad. Every article, including this one, that talks about using the Pi to transmit specifically screams about using a band-pass filter. I'd love to see a screenshot of a spectrum-analyzer when the device is running nearby.