The ‘s-Hertogenbosch Repeater Group serves a WebSDR to monitor the local frequencies online.
Just click on the link below to open the WebSDR.

WebSDR ‘s-Hertogenbosch

Because most of the SDR dongles have only 2 MHz bandwith, it’s not possible to monitor the whole 70cm and 23cm band.

Frequency SDR receiver Antenna
2m (144 – 146 MHz) SDRplay RSP1A Diamond X-5000
70cm (430 – 432 MHz) RTL-USB Diamond SG-7900
70cm (433 – 435 MHz) SDRplay RSP1A Diamond X-300
23cm (1297 – 1299 MHz) RTL-USB Diamond X-5000
3cm RTL-USB LNB for 10 GHz (bearing west)

A picture from the server.

The 23cm SDR dongle.