Alexander Romanov Posted February 8, 2019 Report Share Posted February 8, 2019 Hello everyone, there is a problem with my SMa transmitter, when the audio level is less than 15, noise like "boiling" comes along with the voice, the problem appears suddenly, sometimes it helps to pull out lavalier microphone and insert it back, maybe someone else had such a problem? Quote Link to comment Share on other sites More sharing options...
Philip Perkins Posted February 9, 2019 Report Share Posted February 9, 2019 Tried other mics? Clean contacts? Quote Link to comment Share on other sites More sharing options...
Alexander Romanov Posted February 9, 2019 Author Report Share Posted February 9, 2019 Clean contacts, I use Sanken Cos11 with different wiring, it's in the transmitter, when I raise the level to 20 it disappears, Quote Link to comment Share on other sites More sharing options...
Derek H Posted February 9, 2019 Report Share Posted February 9, 2019 Time for service. Quote Link to comment Share on other sites More sharing options...
jpb2 Posted February 9, 2019 Report Share Posted February 9, 2019 What I think of as a "boiling" sound is usually bad contacts or a (failing) bad capacitor. Quote Link to comment Share on other sites More sharing options...
mikewest Posted April 1, 2019 Report Share Posted April 1, 2019 Look in the 5 pin mike connector on the transmitter Often dirt collects there and causes this problem Use a blower and maybe a squirt of DeOxit mike Quote Link to comment Share on other sites More sharing options...
LarryF Posted April 1, 2019 Report Share Posted April 1, 2019 Hi Alexander, The 5 pin isn't the problem since the hiss comes and goes and disappears with increasing gain, but as Mike suggests, it's always good to keep the 5 pin connector clean. Sweat, rain and Coca-Cola ends up in there as the transmitters go through various users. Alcohol on a thinned down Q-Tip works pretty well or cotton on a toothpick. Don't flood the connector. We try to seal them but it is not 100% effective. You may have to blow a strand or two of lint out after you finish. I suspect instability (oscillation) in the mic gain stage when the gain is below 20, particularly since it "stabilizes" sometimes when you unplug the lavaliere. Best Regards, Larry Fisher Quote Link to comment Share on other sites More sharing options...
Alexander Romanov Posted April 2, 2019 Author Report Share Posted April 2, 2019 Yes, and another observation: the longer the transmitter operates, the more likely the problem , Quote Link to comment Share on other sites More sharing options...
afewmoreyears Posted April 2, 2019 Report Share Posted April 2, 2019 MAYBE..The more the battery depletes, the worse the data travels over a connection that is dirty I would imagine.. That being said, the trans. is supposed to deliver the proper voltage till shut off... so... I really don't know.. Quote Link to comment Share on other sites More sharing options...
Alexander Romanov Posted July 13, 2020 Author Report Share Posted July 13, 2020 Upg. The 5-pin connector has been replaced and the problem has disappeared, Quote Link to comment Share on other sites More sharing options...
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