Quite strange frequency, just near R. Jong Europa on 6175
Typo ?
late edit : TRI admitted that was erroneous.
My comment : even if that was the displayed frequency on the Twente SDR screen, the audio was from strong 6175 (strong enough to steal the output, maybe with the help of the sync mode).
So I removed all the replies after that one, but I keep the details and I merge that with Radio Jong Europa.