49er Fan Posted August 25, 2011 Share Posted August 25, 2011 Can someone please help us out. We have a mixture of wireless mics on various frequencies ranging from 600 to 864 Mhz. We have 4 trantec S4.16 mics on the 863 frequency and another 6 trantec S4.16 mics on the 600 frequency range.We also have two Sennheiser mics ew 100 g2s. Now the first problem is I believe we need a licence for each of these mics, is this correct. How much do you think this will cost us. Where would we get the licences from. What type and duration of licence can you get. Come 2012 will we no longer be able to use the 6 trantecs on the 600 range? Will the other mics be ok to use? We are a large school in Scotland, do we get any kind of discount???? Sorry for so many questions Link to comment Share on other sites More sharing options...
Simon Lewis Posted August 25, 2011 Share Posted August 25, 2011 863 - 865 (pragmatically 863.1 to 864.9MHz) is and continues to be free to use. If your six Trantecs in the "600 range" are in fact in channel 38 (606 to 614MHz) then you should be able to buy a shared licence for around £85 per year or £135 per two years. This might go up though... If they are not in channel 38, then you must purchase a specific site licence for each frequency used. In either case you should be talking to JFMG. The post 2012 situation depends on your radios' tuning range.You do not state what frequency the Sennheisers are working on, but thesame applies to them - either use channel 70 for free, channel 38 with a shared licence or -if they can still be used- a site specific licence outside of these bands. Radios will not be able to use "channel 69" after 2012. If you had owned radios that worked in this band and had owned a licence, you would have been eligible for compensation. Ofcom did not extend financial recompense to those who were using Ch 69 radios without a licence. If you can detail the actual frequency ranges your systems use, we coudl eb a little more specific. Oh - being a school does not qualify you for any discount... Simon Link to comment Share on other sites More sharing options...
Ynot Posted August 25, 2011 Share Posted August 25, 2011 Simon said it better than I did..!:) Link to comment Share on other sites More sharing options...
Bobbsy Posted August 25, 2011 Share Posted August 25, 2011 Only thing to add is that you should visit the JFMG WEBSITE and, if necessary, contact them on 020 7299 8660. They're very helpful people and good at answering questions and suggesting the best deal. Link to comment Share on other sites More sharing options...
49er Fan Posted August 26, 2011 Author Share Posted August 26, 2011 Thanks guys brilliant advice, our senn mics can use channel 70 so thats a relief. We would only be using the 6 trantecs on ch 38 for about a week for the school show can we just get a licenec to cover the school show period or would we be better getting a two year licence for these Link to comment Share on other sites More sharing options...
Simon Lewis Posted August 26, 2011 Share Posted August 26, 2011 The shared licence for Channel 38 gives you (AFAIR) 12 frequencies. You would be much better off buying the 2 year licence and being able to use these mics at any time. It's not so likely you could get specific site licences for those units anyway. Link to comment Share on other sites More sharing options...
StevieR Posted August 28, 2011 Share Posted August 28, 2011 Also bear in mind that you won't be able to use your 4 x Trantecs using 863-865 at the same time as the 2 x Sennheisers as these would be trying to tune within the same band (Chan 70 = 863 to 865) and would most likely result in intermodulation problems. If you want to have a chat about it then please feel free to PM me as we're a retailer based through in Edinburgh and have been dealing with many enquiries on the subject. Steve Link to comment Share on other sites More sharing options...
Ynot Posted August 28, 2011 Share Posted August 28, 2011 Also bear in mind that you won't be able to use your 4 x Trantecs using 863-865 at the same time as the 2 x Sennheisers as these would be trying to tune within the same band (Chan 70 = 863 to 865) and would most likely result in intermodulation problems. Er, why?Unless I've missed something, the Trantecs and (certainly the Senn G2) are tunable mics/receivers, so as long as the OP chose different suitable frequencies there'd be no major problems.... How do you perceive intermod issues on just 6 frequencies...? Link to comment Share on other sites More sharing options...
paulears Posted August 28, 2011 Share Posted August 28, 2011 I think it's because fitting 6 into the space usually considered tight for 4 is going to mean some overlap, and/or extending outside the band edges. while we normally think of intermod as interference products from sum and difference frequencies, coupled with IF selectability, there's little doubt that interference from next door channels could be considered as intermod - and I rather doubt 6 interference free channels are going to be squashed into that tiny band with any degree of independence. Link to comment Share on other sites More sharing options...
Ynot Posted August 28, 2011 Share Posted August 28, 2011 Doh.Had (another) brain flip there - I misread the post and thought he was on about chan 69, when in fact he clearly said ch 70!Apologies.:( Link to comment Share on other sites More sharing options...
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