In the last two weeks, I've finally logged some Dutch FM pirates, after regularly trying to catch a signal for one year now. Putting my antenna on the upper floor, changing it's position and scanning the band at night were the key
These logs were made in the Ruhr area (Germany), I've verified them by means of the streams on http://geheimezender.com.
Equipment: My Umi Plus (has an integrated FM radio) + two different headphones (with 1.5m & 3m cable length, as the cable serves as an antenna).

07.05.2017
22:20
97.1 MHz
Radio Onbekend
Location: Achterhoek, Netherlands

12.05.2017
23:30
94.5 MHz
Radio Noaberkracht (/ Formatie de Zoeke, as they're using the same mobile number)
Location: Saasveld/Zoeke, Netherlands
https://piratenopname.nl/opname/1741-Ra ... racht.html
(I'll upload another little sample on Youtube soon)

14.05.2017
00:30
94.5 MHz
Radio Noaberkracht (/ Formatie de Zoeke)
Location: Saasveld/Zoeke, Netherlands

24.03.2019
18:00
94.5 MHz
KMK (might be Kort maar krachtig)

Correct, Kort maar Krachtig ( Shortly but powerfull )

29.05.2022, between Arnhem and Emmerich am Rhein. Reception of both stations kept on for quite a long time while driving on the highway in Germany. Sadly I forgot the station names. I think one of them was something with 'Sturmvogel' and the other some known station that added something like 'vinyl show' to their title.
97 MHz
98.7 MHz

05.06.2022
94.5 MHz, Ootmarsumse piraatjes (confirmed with Geheimezender), rx location: Ruhrgebiet
Quite good reception on the attic.

10.06.22/14:30-15:20
Location: Reception started on the Autobahn A3 behind Dinslaken (direction Arnhem/Netherlands).
94.5 MHz Hans en Grietje
97 MHz De Sjekkie FM

Both on video, I'll upload it soon.



02.07.22/22:15
Location: Near Maasvlakte beach/Netherlands
108 MHz Fantasy! [Fantasy FM]

Also on video.