With Impact AM from Wassenaar frequently dropping off the air, I had the opportunity to listen to, and QSL Zender Zanussi & Radio Hercules on 819 kHz. I sent my report to radio819am@hotmail.com .
Zender Zanussi & Radio Hercules is (are) operated by two brothers Johan and Andre. On Saturdays Johan runs Radio Hercules playing English music mainly. On Sundays Andre runs Zender Zanussi with with mainly Dutch music. And indeed I heard Zender Zanussi with polka music (the music typically played by pirate stations from the Netherlands) and some German classics as well.
Johan and Andre have been active in the pirate scene since 1977. But like a few other stations in the eastern part of the Netherlands they used the opportunity created in 2016 to start a legal 100 W LPAM operation. They are active on 819 kHz since December 2023 from the village of Mastenbroek, Overijssel province, The Netherlands. In the western provinces of the Netherlands Impact AM is usually dominant on 819 kHz. The other LPAM station “Studio Denakker” from Klazienaveen is apparently not active yet.