curry2 Posted June 6, 2008 Posted June 6, 2008 hi guys, yes ive been searching but cant find anything. id like to know what low powered translators and local transmitters are made out of and built with because im interested to know. whats ok and whats not for people to build their own translators to retransmit their city tv networks in each uhf channel thats not being used in that area because id like to try it but want to know whats ok and how i should go about trying. ill probably transmit the adelaide 7,9 and ten and c31 networks in all uhf channels not being used in the wallaroo, kadina, moonta/spencer gulf area as i want to improve 7 and 9 in kadina, wallaroo, moonta and probably looking at about 50-70 kms transmission in 360 degree angle and want to know what power is needed. whats the maximum power and how far maximum for a homemade translator for the tv signal.
AV Forum DTV Posted June 6, 2008 Posted June 6, 2008 You cannot retransmit without a self-help licence from ACMA. If you are serious (and I have my doubts) I suggest you contact ACMA via their website www.acma.gov.au
Theres Always Radio Posted June 6, 2008 Posted June 6, 2008 Hi Curry2 I don't know why the DTV Forum Moderator has replied in that tone. I suspect he/she in fact have little or no knowledge on this subject and should limit themselves to keeping order, controlling language and generally helping everyone be really nice to each other. Back to your subject. Wow! You have picked yourself a really big task looking at providing a 50-70km radius coverage, in essence what you have described is a major broadcast site. One thing the moderator had right that this is certainly a service that would need approval and licencing by the ACMA. What equipment would be needed for this coverage and notably over 360 degrees. (1) A 5kW UHF transmitter (x4) (2) A 4 port combiner capable of handing this power. (3) A UHF antenna and feeder system with around 10-13dB gain. (4) Plus the building and tower. You see even if you could put together a home made transmitter, it is the coverage you are hoping for that is the killer for your plans and in reality takes it out of the scope of a home made project. The above assuming you have a tower to put the antenna on and a building to put the transmitter and combiner in would cost around $1.4m - $1.8m. If you decide that you are interested in getting better Tv for yourself alone, that may well be within the scope of the home made tv translator builder. Cheers James
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