finally managed to watch proper TV on my TF 101.

bought an iPlug marked Tivizen ( tivizen Wifi Dongle - Mobile TV tivizen ) from Amazon and must say it works quite well.

it has europlug and will take advantage of a proper antenna, but once plugged in it works flawlessly providing all DVB-T channels (allegedly) to any android, windows or apple device.
not tested on the latter, but it is very good on my transformer... crisp picture (it also receives HD channels, but for small screen the difference is hard to tell) and nice interface.

I know you can get most channels from a net server, but not all (ever tried to watch F1 live streaming?). This system also uses a separate wifi network, not needing any infrastructure.
On a side note, works fine also with my Xperia U.