chrisyking Posted December 7, 2014 Report Share Posted December 7, 2014 Hi. I have a couple of cos-11D with the battery barrel. They seem to be picking up terrible mobile phone digadigas. Just wondering if anyone has had this before? I'm using long xlr extensions into a SD633, and it's not the mixer cos it did it with my old 302. It seems to do with using long 10m cables. I just checked my cables and they haven't put a small wire between the solder tag of the xlr socket and pin 1. Could this be the problem? It this totally necessary? I mean shouldn't pin 1 be earthed by the mixer anyway? I'll try some other cables when I can, but they seem much worse than ecm77's Chris Quote Link to comment Share on other sites More sharing options...
chrisyking Posted December 7, 2014 Author Report Share Posted December 7, 2014 And again for some reason this post has come up twice.... hmmm.... could the moderator delete one for me? Not quite sure why this is happening. Quote Link to comment Share on other sites More sharing options...
syncsound Posted December 7, 2014 Report Share Posted December 7, 2014 The easiest solution is to have everyone in proximity to the mic turn their phones off or set them to airplane mode. Simply setting the ringer to silent won't stop the phone's radios from pinging the tower, which is likely what you're hearing. Quote Link to comment Share on other sites More sharing options...
chrisyking Posted December 7, 2014 Author Report Share Posted December 7, 2014 Thanks, yes that's what I've being doing, but with ECM77's I never had to do this (sometimes at sports gigs it's impossible). My radios, all with cos-11's have never ever picked up telephones, so to me it must be something to do with the mics or the cables. It's not the mixer for sure. I noticed Sanken bought out this 'D' model supposedly to stop phone noise, so it must be a known problem by them. Maybe I just got an early model as they had just released D when I got them..... This thing with the earth tab on the XLR socket, what do you think? Quote Link to comment Share on other sites More sharing options...
VM Posted December 7, 2014 Report Share Posted December 7, 2014 I use to work with a presenter that has always its mobile open...It surprised me : I never have had any radio noise coming from his mobile. Most of the time when I hear such a noise... it's coming directly on my headphones cable from my own mobile ! Quote Link to comment Share on other sites More sharing options...
chrisyking Posted December 7, 2014 Author Report Share Posted December 7, 2014 Thanks, yes. I really don't think this noise is acceptable from these mics. Quote Link to comment Share on other sites More sharing options...
Jon Gilbert Posted December 7, 2014 Report Share Posted December 7, 2014 I could be wrong, but I don't think the D variant was anything to do with mobile phone noise. Have you tried different cables? ~Any particular reason you're not using radios? Quote Link to comment Share on other sites More sharing options...
Wandering Ear Posted December 7, 2014 Report Share Posted December 7, 2014 I would look at the battery barrel as the culprit since you say you don't get it with radios. As per pin 1 grounding, there is a lot of discission and it with no definite answers. Quote Link to comment Share on other sites More sharing options...
Constantin Posted December 7, 2014 Report Share Posted December 7, 2014 Most of the time when I hear such a noise... it's coming directly on my headphones cable from my own mobile ! That's often my experience, too. It's usually a phone in my headphones rather than the mic. A quick listen back to the recording will confirm. I don't think it will be the missing XLR mod. While Sound Devices is recommending this for use with their 7-series recorders, it is to stop rf leaking out of the recorder not so much into it. RF can enter your audio at various places, so you should check your components one by one. It's basic troubleshooting, really. And don't dismiss the recorder/mixer just because the old one did it, too. If it is the mic then talk to Sanken about it Quote Link to comment Share on other sites More sharing options...
chrisyking Posted December 8, 2014 Author Report Share Posted December 8, 2014 Thanks chaps. I think the D was D for digital. As in digital noise. Will do some troubleshooting later. Quote Link to comment Share on other sites More sharing options...
Jon Gilbert Posted December 8, 2014 Report Share Posted December 8, 2014 D is digital as in digital transmittters. Quote Link to comment Share on other sites More sharing options...
chrisyking Posted December 8, 2014 Author Report Share Posted December 8, 2014 From their leaflet: 'Sanken has introduced the COS-11D, a new version of the popular lavalier which overcomes digital transmitter RFI (radio frequency interference). ' Quote Link to comment Share on other sites More sharing options...
daniel Posted December 8, 2014 Report Share Posted December 8, 2014 From their leaflet: 'Sanken has introduced the COS-11D, a new version of the popular lavalier which overcomes digital transmitter RFI (radio frequency interference). ' ...produced by digital transmitters like sony and zaxcom. i prefer to have my XLRs with the tab connected (grounded shell) - all of the kit i'm using or plugged into is battery powered and i only encounter XLR screen issues with cables without continuous screen. dan. Quote Link to comment Share on other sites More sharing options...
Jon Gilbert Posted December 8, 2014 Report Share Posted December 8, 2014 From their leaflet: 'Sanken has introduced the COS-11D, a new version of the popular lavalier which overcomes digital transmitter RFI (radio frequency interference). ' As far as Sanken are concerned, phones are phones, digital transmitters are something quite different, as Daniel says, see products from Zaxcom and Sony. Quote Link to comment Share on other sites More sharing options...
Jon Gilbert Posted December 8, 2014 Report Share Posted December 8, 2014 Oh, and while I'm here, the 'battery barrels' for the COS11s, are they the hardwired Sanken versions, or a third party variety? Quote Link to comment Share on other sites More sharing options...
pkautzsch Posted December 8, 2014 Report Share Posted December 8, 2014 I suspect the battery barrels too, though also imperfect shielding might let this GSM interference in. My cables all have the connectors' housing connected to pin 1, no issues with RF. That way I ensure the shielding is complete. Leaving the housings unconnected only helps against ground loops created by someone touching the connector. Big issue on a music stage with guitar amps and so on, non-issue in battery-powered and widely wireless movie world. Quote Link to comment Share on other sites More sharing options...
chrisyking Posted December 9, 2014 Author Report Share Posted December 9, 2014 Thanks fellas. They are Sanken barrels which came with the mic. I'm thinking it's probably that some of my cables don't have the tab linked up. Should it be connected both ends? Or just one end? Quote Link to comment Share on other sites More sharing options...
studiomprd Posted December 9, 2014 Report Share Posted December 9, 2014 CK: " Just wondering if anyone has had this before? " YES, and it has been discussed here, though not recently... " Could this be the problem? " perhaps " It this totally necessary? " some folks believe so, others think completely opposite! " I mean shouldn't pin 1 be earthed by the mixer anyway? " well, there may be both an audio common, and a different power earth... " I think the D was D for digital. " (and JG: " I could be wrong, but I don't think the D variant was... " easy enough to find out instead of assuming... " this 'D' model supposedly to stop phone noise," specifically " so it must be a known problem by them. " which this model should not suffer from " I'm thinking it's probably that some of my cables don't have the tab linked up " basic troubleshooting! " Will do some troubleshooting later. " maybe next time do the troubleshooting and some research yourself, first. " Should it be connected both ends? Or just one end? " or neither end..? much discussion, much confusion, no complete agreements! JG: " As far as Sanken are concerned, phones are phones, digital transmitters are something quite different, " maybe... portable telephones are portable digital transmitters, and for that matter, so are most modern tablets and computers... plus all the digital emissions from the CPU's and other components like drives... Quote Link to comment Share on other sites More sharing options...
chrisyking Posted December 9, 2014 Author Report Share Posted December 9, 2014 Thanks Mike. I think they probably released the D version because of the increase in general RF. I guess the major increase is from 3G and 4G rather than radio mics, as I'm not aware of a major increase in the use of radio mics, but I imagine the D version is 'supposed' to counter all RF whatever the source. There are certainly more hard drives and general RF around. I meant 'supposed' as in my case their screening doesn't seem to have worked. The question about doing both ends is basically whether the mixer and the body of the mic should be electrically connected. My guess is that it should be, so I've just made sure if all my cables have this wiring and connected the ends which didn't. I'll report back if it cures the problem..... Quote Link to comment Share on other sites More sharing options...
Jon Gilbert Posted December 9, 2014 Report Share Posted December 9, 2014 No, the D version is intended for use with digital transmitters, such as those by made by Zaxcom and Sony. Is it just me or has this room got an echo? Quote Link to comment Share on other sites More sharing options...
John Blankenship Posted December 9, 2014 Report Share Posted December 9, 2014 No, the D version is intended for use with digital transmitters, such as those by made by Zaxcom and Sony. Is it just me or has this room got an echo? AN ECHO... An Echo... an echo... Quote Link to comment Share on other sites More sharing options...
studiomprd Posted December 9, 2014 Report Share Posted December 9, 2014 CK: " I think... I guess... I imagine... I guess (again!)... " Quote Link to comment Share on other sites More sharing options...
VASI Posted December 9, 2014 Report Share Posted December 9, 2014 AN ECHO... An Echo... an echo... This is this is pretty pretty funny funny funny Quote Link to comment Share on other sites More sharing options...
Jack Norflus Posted December 9, 2014 Report Share Posted December 9, 2014 Crap from digital mics and phones are both classified as RFI but the similarities end there. One has nothing to do with the other. Quote Link to comment Share on other sites More sharing options...
chrisyking Posted December 11, 2014 Author Report Share Posted December 11, 2014 Ok. Sorry Jon, I see what you mean. They do mention transmitters in their bumph. Mine came with the battery barrel, so I wonder what's different? must be something in the head. Mine is a cos-11DBP. Quote Link to comment Share on other sites More sharing options...
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