STU007280 Posted February 15, 2009 Share Posted February 15, 2009 Any ideas to solve my problem would be great! At my old school they invite me back to do lighting/sound for larger productions for the music department and talent shows.We have 6 wireless sets4 handheld and 2 tie-clip.During the Christmas Concert there was a choir singing and 2 solo's in it.When one of the solos finished she switched off her mic and then suddenly there was a really bad feedback like noise.I tried changing the transmitter and reciever frequencies to one of the other sets and we still had the problem..The make of it is Sennheiser EW135 G2 Cheers.J Link to comment Share on other sites More sharing options...
tolley1466 Posted February 15, 2009 Share Posted February 15, 2009 There was a topic with something along the same lines as your problem. I'm not a wireless expert so I'll just give you the like at let everyone else give you possible reasons. Linky. Link to comment Share on other sites More sharing options...
Simon Lewis Posted February 15, 2009 Share Posted February 15, 2009 Did the offending receiver 'mute' when the transmitter was switched off? If it is a G2 system, was the pilot tone enabled? Have you made sure that the frequencies in use are intermodulation free? Would it not be better to prevent the singers from turning the mics on/off, and control them from the mixer? Simon Link to comment Share on other sites More sharing options...
Rob_Beech Posted February 16, 2009 Share Posted February 16, 2009 This is a squelch setting issue. Nothing to do with the topic Tolley links to but I can see why he may have linked the 2. Adjust the squelch accordingly on the receivers. What Simon says is also equally important. Pilot Tones on if they are the G2's. Use Sennheisers chart or the necessary software to get 6 intermod free channels WITHIN THE FREQUENCY RANGE YOU HAVE A LICENSE FOR. You do have a license don't you? Link to comment Share on other sites More sharing options...
aidso Posted February 16, 2009 Share Posted February 16, 2009 license??? ** laughs out loud ** As rob said I would put my money on a squelch issue. Not sure about intermod cause that would usually happen when the mic is turned on unless you are using a wireless show relay or in ears where the signal may bleed back into the offending receiver?? check your squelch. If the receiver is onstage then put it to max 15db if I remember rightly. Link to comment Share on other sites More sharing options...
STU007280 Posted February 22, 2009 Author Share Posted February 22, 2009 Cheers for all the feedback, ive tried all of that plus more so we are sending them away to be repaired. Yeh I did tell them NOT to turn off the mics just to mute them, but they are school kids they never listen!even more annoying for me as I only turned up for the event to do lighting, and then I got told I was doing sound! Thanks againJ Link to comment Share on other sites More sharing options...
d_korman Posted February 23, 2009 Share Posted February 23, 2009 Cheers for all the feedback, ive tried all of that plus more so we are sending them away to be repaired. Yeh I did tell them NOT to turn off the mics just to mute them, but they are school kids they never listen!even more annoying for me as I only turned up for the event to do lighting, and then I got told I was doing sound! Thanks againJ They should not be touching them at all - tape over the switches! Link to comment Share on other sites More sharing options...
johndenim Posted February 23, 2009 Share Posted February 23, 2009 This is a squelch setting issue. Nothing to do with the topic Tolley links to but I can see why he may have linked the 2. Adjust the squelch accordingly on the receivers. Agreed.The mrs has one similar (G1) which required the squelch to be adjusted. I found that out on a gig when she switched it off there was a massive rf type buzz/hiss and it almost gave one old deara heart attack.. oops. :) Link to comment Share on other sites More sharing options...
Rob_Beech Posted February 23, 2009 Share Posted February 23, 2009 I must admit I'm certainly not convinced they're faulty, but you'll get good customer support from them so I hope all goes well. Do remember to let us all know how they get on. Link to comment Share on other sites More sharing options...
STU007280 Posted February 23, 2009 Author Share Posted February 23, 2009 I must admit I'm certainly not convinced they're faulty, but you'll get good customer support from them so I hope all goes well. Do remember to let us all know how they get on. Will do.Although wont find out till June, thats when im next doing a show for them! Link to comment Share on other sites More sharing options...
Rob_Beech Posted February 24, 2009 Share Posted February 24, 2009 We won't be far away :** laughs out loud **: You could alwasys give them a ring and ask if they got it sorted in a few weeks. Shows them you're interested, might get you a few extra brownie points. Link to comment Share on other sites More sharing options...
AndyL Posted February 24, 2009 Share Posted February 24, 2009 license??? ** laughs out loud ** As rob said I would put my money on a squelch issue. Not sure about intermod cause that would usually happen when the mic is turned on unless you are using a wireless show relay or in ears where the signal may bleed back into the offending receiver?? check your squelch. If the receiver is onstage then put it to max 15db if I remember rightly. If other transmissions are producing an intermod product on the frequencfy of the offending receiver then it is precisely when the matching transmitter is turned off that the problem is most likely to become apparent. In an FM system 'capture effect' will ensure that the strongest signal wins, in this case the signal from the wanted mic. Once that is gone then the intermod product or other interference source has a clear run.... How many radio mics were in use in total? Squelch on G2 only has three settings, High, Medium, Low or four if you count 'Off' (press and hold the down button from Low). On "G1" the squelch settings were given in dB's. And why should the idea of someone actually having a Wireless Telegraphy Act licence be a source of mirth BTW? Link to comment Share on other sites More sharing options...
Protea Posted February 24, 2009 Share Posted February 24, 2009 Hi all, I am new to this site, but offer two way radio and wireless microphone repairs. I am in full time employment and do repairs in my fully equipped home workshop in the evenings and over weekends. Hoping to go full time from home in six months or so. I have 30 years experience in the radio repair field. Link to comment Share on other sites More sharing options...
johndenim Posted February 24, 2009 Share Posted February 24, 2009 Self plug anyone? No seriously, welcome to BR, a chap like you would be handy to know!Where are you based Mike? Link to comment Share on other sites More sharing options...
Noizeboy Posted March 24, 2009 Share Posted March 24, 2009 We had the same problem, it was down to a receiver not 'diversifying' between signals, so it would not mute. the receiver will only mute when it receives nothing from either aerial A or B, we sent ours away and they were fixed no problem, didn't cost a shocking amount either. Link to comment Share on other sites More sharing options...
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