[MTCB Android Head Units Q&A] typos1:
I take it youre using it to listen to digital radio ? This is what I wanted it for, as DAB in the UK is much worse sound quality than FM, due to that amount of channels that are shoved down the same bandwidth. a flaw in this plan is that AFAIK no mobile DVB-T tuners will auto retune to the next transmitter as youre leaving the range of the one you were previously tuned to. So, when youre in Kent, try re-tuning, it may be that youre just out of range of the transmitter for London and after a re-tune you can pick up signal. I dont know why mobile DVB-T boxes dont come with auto re-tuning.

The box in the link you posted IS dual antenna/diversity - you can tell because it has 2 antenna inputs. Navall is a HuiFei re-seller and that box is what is supplied with some KGL and GS units, also older Samsung S100 units, it has the same old crappy 10 year old interface as mine, its just the same as my internal version, the only differnce is that it comes in a plastic box and is connected externally (yours I take it, has the blue & yellow GUI, like the picture in the post a few months back ?). What make is your headunit ? Isnt it KGL ?

I ve experienced the factory fit DVB-T in an E90 M3 and it works very well, virtually no interference. I was aware that BMW used diversity antennas and was hoping that they take 2 antenna inputs and combine them into one, then deliver the single combined signal to a box with 1 antenna input, that way we could buy a BMW diversity box and use it to convert a single tuner box into a diversity one. But they dont, the tuner has 2 antenna sockets as well :( When I was looking into this, I came across a couple of articles about antenna placement on BMWs, specifically the E90 and E46 and, like you say, theyre all over the place - some behind bumpers, some in the roof at the back, some on the roof at the front. This also seems to contradict the stuff I read about antenna placement :eek:

I just hate the GUI, I ve got a £10 Android DVB-T tuner that has a much better interface, I just wish I could convert it into diversity. But the combiner I found on ebay (in my post above) is worth a try as its so cheap (but youd have to buy another antenna for your set up).

I have come across this as well:

http://www.youtube.com/watch?v=vhLWh77y3sE

its the Navall headunit ( I assume running the box you linked to, but there are older Gingerbread Navall headunits that had DVB-T as well). It still has the crappy blue/yellow GUI, but at least the touchscreen interface for it looks better than the way theyve done it on the KLD. The picture quality does look better than mine as well, but Klyde sent me several videos of the DVB-T working on my unit and when it came it didnt look so good, I guess thats down to the quality of the device used to film it.

Still, if youre happy with the interface and the picture quality, diversity with at least 2 amplified antennas is the way to go. Before I removed the single tuner module, I tried it with 1 antenna and 2 antennas combined, there wasnt really much difference, this is cos as I said in the post above, that wiring 2 together can cause interference and Doppler effect. So another antenna with a combiner may be worth trying wit the dingole tuner DVB-T before you buy a diversity one - your ll need another antenna for that anyway and the combiner is so cheap its gotta be worth a try.

This was quite an interesting thread on this subject:

http://www.the75andztclub.co.uk/forum/showthread.php?t=56327

And some pics of the single tuner module removed and the dual tuner module fitted. As you can see its attached to the board with a series of large pins, wish I knew what they all did, maybe one is an HDMI input ?