Radio Piepzender (Peep-sender) is a station that can be heard in the 41 m band during the weekend. The station is also testing on various other bands, but as far as I know there is no regular schedule.
I got this email for my reception report of their transmission on 7405 kHz. As you can see power is 150 watts. The transmitters of Piepzender are quite impressive: robust Rohde and Schwarz.
Stationmanager Henri asked me to make it explicit that reception reports should go to firstname.lastname@example.org. Other email addresses are not monitored anymore.
You can also get a paper QSL if you send 5 Euro to:
PO Box 2702
6949 ZG HERTEN