[Tagging] Tagging communication transponders

[John Smith]

The ACMA (Australian Communications and Media Authority) just released
a data set of communication transponder locations for TV and radio
station, a lot of these share the same mast/tower however this
proposed feature suggests using multiple nodes to indicate multiple
transponders but this doesn't seem like a good idea to me:

http://wiki.openstreetmap.org/wiki/Proposed_features/Communications_Transponder

One tower in Sydney has 17 different transponders listed at the same location:

http://www.nearmap.com/?ll=-33.820111,151.185026&z=20

Does anyone have any suggestions to cleanly tag these other than a
single node + multiple relations?