You might be seeing a 4G LPDA antenna pointing towards a mobile phone tower. Not uncommon on business premises in places of patchy reception. They are vertically polarised.
Some FM radio stations often have a 840-850 MHz band antenna for their uplink to their transmitter. I can tune into several of these in Bendigo with my old analogue wideband scanner if I’m inside the beam.
I used to work in retail, and yep, many big-smoke purchasers don’t understand these sort of things. The branches can tell them until they’re blue in the face, but it never changes!
Why is Melbourne going to be last to roll out?
The AFL, probably.
Wow. There’s a co-incidence. Thanks @TV.Cynic!
Doesn’t seem like the website has been updated yet. The latest info is about the Brisbane & Gold Coast switchover from July.
Awesome, surely Melbourne won’t be much time after this.
And hopefully it makes the others get their act together.
I believe Nine is the last to switch over, 10 already has FHD across all channels in all metros bar Nickelodeon and most O&O affiliates also
10 still has an SD simulcast of the main channel on LCN 10 in metro areas. Channels 1 and 15 carry the main channel in HD in said areas.
All 10 channels in the 3-agg regional TV markets acquired from SCA are in MPEG-4 HD except for Nickelodeon which is in MPEG-4 SD. No MPEG-2 SD simulcast of the main channel anymore in markets like e.g Ballarat, Canberra and Wollongong on Channels 5 and 51.
Northern NSW 10 O&O stations acquired from WIN are also in MPEG-4 HD, multi channels included. Nickelodeon isn’t on-air in markets like e.g Newcastle and Coffs Harbour.
You know you just extended what @MossPickle said? 
It took them a few days when Brisbane was announced as well - which is odd when they have promos pointing viewers to the website.
I’d assume Melbourne will follow pretty closely, as they kinda just have the two month window between the AFL grand final and the Ashes starting to make the change.
I suppose the thing with Nine is they already do have all their key channels in HD, even if the picture quality is awful at times, you still have Go and Gem both in HD, unlike Seven’s situation where 7Two often shows sporting events in SD.
If they don’t care about picture quality to allow their current status quo, not sure what would prompt them to change.
When I first saw that antenna, 4G wasn’t available yet.
They’re following the same order for capital cities as the analog TV switch-off in 2013. Melbourne switched off a week after Sydney, so maybe the same thing will happen this time.
Well I’m happy with that! 
Surely Nine could make the switch overnight if they wanted to? The HD channels already exist, it’s just shuffling 9HD, 9Gem HD and 9Go! HD to 9/90, 92 and 93, then erasing the SD versions?
It’s unfortunate that they don’t.
For a short time this afternoon Nine had NRLW on 9/90, Athletics on 92/95 and Tennis on 93/99 -for a total of six streams with sport. This was how they were allocated.
| 9 | 9SD | 2.6 |
| 90 | 9HD | 4.5 |
| 92 | Gem | 1.9 |
| 93 | Go | 1.8 |
| 94 | Life | 1.8 |
| 95 | Gem HD | 3.1 |
| 96 | Rush | 1.5 |
| 97 | Extra | 1.3 |
| 99 | Go! HD | 2.8 |
They really need to get rid of those SD streams. Such a waste of bandwidth
2.8 on Go!HD is shocking
