What size dish do I need?
- TECHNICAL ASSISTANCE CENTRE
- 02 Jan, 2017
Generally, the bigger the better but sometimes it’s just a compromise.
If you are travelling around Australia and you are limited for space in your caravan or camper van, carrying a 90cm dish with you may not be possible, hence a compromise.
As a rule of thumb, the further South you are travelling the better and strong the Vast signal will be. If you travel to Cape York or some isolated parts of the Northern Territory, you may not be able to receive a signal even with a large dish and especial in the wet season.
As a rule, (and there are exceptions), anywhere South of the Queensland border, a 65cm will suffice. Further North to Cairns, a 75cm to 85cm is better. Towards the top end, 85cm to 90cm would be better.
All the above dimensions are subject to clears days. If there is heavy cloud in the sky or it is raining, your signal will be reduced and to the point it may fade altogether until conditions clear.
For fixed dishes it’s somewhat easier. Again for vast a 65cm for the Southern States, 85cm or 90cm for the Northern States. The larger the dish the less chance of “rain fade”.
Christian channels on D2 we recommend an 85cm or 90cm almost everywhere.
For C Band it’s going to depend on the satellite being received and the transponder beam and power to your area.
As a minimum, up until recently, to receive RTPi, TVE and RAI, a 2.3mtr mesh prime focus dish was all that was required. A few months ago (August 2016), there were changes on AsiaSat 5 where some of these stations moved to a different transponder. This has meant that signals are weaker and now, (at the suggestion of AsiaSat) a 3mtr mesh dish is now required.
Once again the bigger the dish the more likely you will be able to receive the channel you require.