This beacon is some miles east of the southern runway of the airport.
In Brussels take the N2 towards Leuven.
After passing Kortenberg go left to Erps-Knerps.
At this village you search for 'van Gramberenstraat.'
Drive on this road in north-westerly direction. At the end of this road you go left.
The road on which you drive now is becoming a dirt track.
The VOR/DME is after a crossing with another track on the LHS.
Erps-Knerps has a lot of nice bending roads with one way traffic.
This makes it very difficult to provide you with an accurate route.
But the beacon is at the North West corner of Erps-Knerps.
VOR/DME antenne BUB, 1 June 2006, overview.
VOR/DME antenna BUB
Antenna building at BUB, 1 June 2006
Location beacons at Brussel, © openstreetmap.org