I opened the Lafayette, as it was working, but very weak signal and very noisy. Since the connector to the aluminium shaft was previously hacked and chewed, I pulled it out and soldered a brand new connector inside the metal case (discarding the plastic casing). It now correctly has a shielded three pin connector, however I soldered the neutral pin to the case, since it was a two pin before.

The signal is much stronger now, but still very noisy. So I might have to come up with  a different solution.