Guest steven1503559515 Posted March 23, 2007 Posted March 23, 2007 For those who are hanging out for Prime, Win & SC10 to start out of Mt Ulandra. Spoke to my friend Mick the Techo about 2 weeks ago, he advised me that the transmitters for all 3 services had arrived and were sitting in storage in his Wagga workshop. He said he was just waiting for Broadcast Australia to finish the (then) current upgrade of the tower before he could start the installation. According to today's DBA newsletter, that upgrading is now complete. Broadcast Australia completes Southwest Slopes/Eastern Riverina NSW transmission worksBroadcast Australia has recently completed a major upgrade of the primary UHF antenna at its Mount Ulandra broadcast tower which services the Southwest Slopes and Eastern Riverina area of New South Wales. With the completion of this work, digital television services in the region can be expanded by the local commercial and national broadcasters over the coming months. Commercial broadcasters have confirmed to Digital Broadcasting Australia that they intend to commence the installation of their digital television transmitters and the subsequent transmission of their digital television services as soon as possible. Current advice indicates that all commercial broadcaster digital television services are scheduled to be On-Air around the middle of 2007, weather and other factors permitting. To view the latest advice as to when the digital television services for the Southwest Slopes and Eastern Riverina area are scheduled to commence please see the DBA Reception Locator. So it really should only be a matter of weeks. Mind you, we're about to head into some cr@ppy weather, so I wouldn't be surprised if that doesn't delay things yet again... I'll try to catch up with Mick on Monday and see if he can add anything more... Cheers, Steve
Smotster Posted March 23, 2007 Posted March 23, 2007 Mate thanks for the info, this is great news, now i better invest in a HD PVR soon so I can be ready. Its nearly time....yay
bizzibee Posted March 24, 2007 Posted March 24, 2007 Hi Steven, Thanks for the update. Glad to know that it's finally happening. There are a lot of people just waiting for commercial DTV to start in the Eastern Riverina & South West Slopes. I have a few friends in Narrandera waiting commercial DTV to start from Mt Ulandra because they are happy with what they are getting from WIN's Multichannel Prime & WIN DTV service, No HD and no third (SC10) service from Mt Bingar (near Griffith). One of them has actually been picking DTV from Mt Baranduda (near Albury), and also gets DTV from Mt Major (near Shepparton). However he can't get all the channels from these two sites because of the Analog channel's from Mt Bingar killing them. Anyway that's another story. Nice of Prime to allow SC10 & WIN to store their Digital Transmitters at the Prime Studio and Workshop site in Wagga Wagga. I'd expect these DTX's to be water cooled transmitters, given their output power, which will add time (plumbing) to the installation. However I guess they could be air cooled. Anyway doesn't matter as long as they get installed ASAP. I guess Mick would have a very good idea when Prime/he will start the install of their DTX on Mt Ulandra. I guess he would also have a good idea when SC10 & WIN will be starting their installs as well. Anyway thanks again for the inside local info. Much appreciated! Kindest Regards Mark
austruckie Posted March 24, 2007 Posted March 24, 2007 Hi Steven,Thanks for the update. Glad to know that it's finally happening. There are a lot of people just waiting for commercial DTV to start in the Eastern Riverina & South West Slopes. I have a few friends in Narrandera waiting commercial DTV to start from Mt Ulandra because they are happy with what they are getting from WIN's Multichannel Prime & WIN DTV service, No HD and no third (SC10) service from Mt Bingar (near Griffith). One of them has actually been picking DTV from Mt Baranduda (near Albury), and also gets DTV from Mt Major (near Shepparton). However he can't get all the channels from these two sites because of the Analog channel's from Mt Bingar killing them. Anyway that's another story. Nice of Prime to allow SC10 & WIN to store their Digital Transmitters at the Prime Studio and Workshop site in Wagga Wagga. I'd expect these DTX's to be water cooled transmitters, given their output power, which will add time (plumbing) to the installation. However I guess they could be air cooled. Anyway doesn't matter as long as they get installed ASAP. I guess Mick would have a very good idea when Prime/he will start the install of their DTX on Mt Ulandra. I guess he would also have a good idea when SC10 & WIN will be starting their installs as well. Anyway thanks again for the inside local info. Much appreciated! Kindest Regards Mark I am sure that they will be water cooled. Still of opinion Prime will install within next 2/3weeks but Win and S C I cant get anything too definite although Win Wagga says June but if DTX are in country and virtually on site it would appear installation techos workloads may determine time of actual installation. cheers alan. ps any reason that a\ new thread started for Mt Ulandra.
bacco|007 Posted March 25, 2007 Posted March 25, 2007 Where are some of these sites getting water from? Its not like they are connected to a reticulated network...
bizzibee Posted March 25, 2007 Posted March 25, 2007 Where are some of these sites getting water from? Its not like they are connected to a reticulated network... When I said water cooled, I should have actually said liquid cooled (using perhaps a 50% mixture of water and propylene glycol). Sorry! . It works much like the cooling system in your car. The plumbing I was talking is for the outdoor heat exchanger. Since the two existing, and three new DTX on Mt Ulandra will each have a power output of 600Kw, they would have to be close to the largest DTX in Australia. A NEC DTU-51 Series air-cooled digital TV transmitter was installed at Mt Nardi by NBN Television. I'm not saying that the DTX to be installed on Mt Ulandra by Prime, WIN & SC10 are NEC transmitters as I don't think NEC make DTX big enough. I just thought this info would be helpful. Have a read of this for some background info: http://www.neceurope.com/pdf/DTU-51%20Seri...h%20Edition.pdf I would have thought with the output power required to get 600Kw off the UHF Antenna, you would need a very high power UHF Digital TV transmitter with IOT (Inductive Output Tube). See: http://www.sieltelevision.com/?*_iot~easyadmin:60~prodotti Info on IOT (Inductive Output Tube): http://www.ebu.ch/en/technical/trev/trev_273-heppinstall.pdf
128QAM Posted March 26, 2007 Posted March 26, 2007 Wow, A 600Kw Digital Transmitter. LOL Me don't think so !!!!! Try 5 to 10Kw DTX then add the antenna gain. 128QAM
bizzibee Posted March 27, 2007 Posted March 27, 2007 Wow,A 600Kw Digital Transmitter. LOL Me don't think so !!!!! Try 5 to 10Kw DTX then add the antenna gain. 128QAM 128QAM, What I said was..... I would have thought with the output power required to get 600Kw off the UHF Antenna, you would need a very high power UHF Digital TV transmitter with IOT (Inductive Output Tube). I'm not pretending to be a broadcast tech or engineer. But I thought that 10x antenna gain would be reasonable. I guess I was wrong. The link I provided for TV transmitter with IOT (Inductive Output Tube) had output power of 30-40-60 kW. Not 600Kw ! Perhaps you can tell me what the approx. antenna gain would be likely to be. A link to the specs would be helpful. Thanks!
128QAM Posted March 27, 2007 Posted March 27, 2007 ------------------------------------------------------------------------------------- QUOTE(bizzibee @ Mar 25 2007, 06:06 PM) I would have thought with the output power required to get 600Kw off the UHF Antenna, you would need a very high power UHF Digital TV transmitter with IOT (Inductive Output Tube). ------------------------------------------------------------------------------------------------------------- Sorry, I stand corrected. The DTX's at Mt Ulandra, to my understanding are going to be 7.5Kw at TX. I will try to find the data to the UHF Stack for you. 128QAM
bizzibee Posted March 28, 2007 Posted March 28, 2007 -------------------------------------------------------------------------------------QUOTE(bizzibee @ Mar 25 2007, 06:06 PM) I would have thought with the output power required to get 600Kw off the UHF Antenna, you would need a very high power UHF Digital TV transmitter with IOT (Inductive Output Tube). ------------------------------------------------------------------------------------------------------------- Sorry, I stand corrected. The DTX's at Mt Ulandra, to my understanding are going to be 7.5Kw at TX. I will try to find the data to the UHF Stack for you. 128QAM 128QAM, Thanks for the reply. Regardless I was completely wrong about the DTX power output required. Anyway I look forward to the data on the UHF Antenna (if you can find it). If I had of engaged my brain, I would have know from the NEC DTU-51 Series air-cooled digital TV transmitter that was installed at Mt Nardi by NBN Television, that the max output of this DTX was 2.5kW, and that the output from the Antenna was 200kW. So that means an antenna gain of 80x. What a goose I am.
128QAM Posted March 28, 2007 Posted March 28, 2007 Most of the new and antenna stacks are made by RFS http://www.rfsworld.com. If have a look at there broadcasting antennas you will get some idea. Have a look at the PHP and PVP series. (Page 533 of the PDF, http://www2.rfsworld.com/RFS_Edition3/pdfs...DAB_512-552.pdf ) Most Antenna supplied are made to suit a certain site. Eg. The Broadcast sites on the Eastern seaboard, most of the power is pushed to the north,south and a less to the west. Very little is pushed to the East ( Due to the Great blue sea and no viewers) So in general, the Effective Antenna radiated power say 200kW . Means very little, the direction of the radiated power is most important. There are also other factors the count, like Beam Tilt. Broadcast Antenna stacks are a very complex science. I Hope that helps 128QAM
digitalj Posted March 28, 2007 Posted March 28, 2007 Not so sure if this will help, but here's the details of the DTX for ABC Digital on UHF: http://web.acma.gov.au/pls/radcom/assignme...VICE_ID=2327451 And here's the details for SBS DTX: http://web.acma.gov.au/pls/radcom/assignme...VICE_ID=2329909
bizzibee Posted March 29, 2007 Posted March 29, 2007 Most of the new and antenna stacks are made by RFS http://www.rfsworld.com. If have a look at there broadcasting antennas you will get some idea. Have a look at the PHP and PVP series.(Page 533 of the PDF, http://www2.rfsworld.com/RFS_Edition3/pdfs...DAB_512-552.pdf ) Most Antenna supplied are made to suit a certain site. Eg. The Broadcast sites on the Eastern seaboard, most of the power is pushed to the north,south and a less to the west. Very little is pushed to the East ( Due to the Great blue sea and no viewers) So in general, the Effective Antenna radiated power say 200kW . Means very little, the direction of the radiated power is most important. There are also other factors the count, like Beam Tilt. Broadcast Antenna stacks are a very complex science. I Hope that helps 128QAM Hi 128QAM, Thanks! I appreciate the time you have taken to provide the information & links above. Mark
bizzibee Posted March 29, 2007 Posted March 29, 2007 Not so sure if this will help, but here's the details of the DTX for ABC Digital on UHF: http://web.acma.gov.au/pls/radcom/assignme...VICE_ID=2327451And here's the details for SBS DTX: http://web.acma.gov.au/pls/radcom/assignme...VICE_ID=2329909 Hi digitalj, Thanks for those links! Mark
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