matsgone Posted June 18, 2012 Report Share Posted June 18, 2012 Hi, I have been getting the same over and over problem on ASTARS and would really like to fix it once and for all. This has happened lots, through the years on different machines(only Astars) from different companies . When keying the FM radio(TFM550) from the pilot cyclic, the VHF radio squelch from either COM 1 or COM2 seems to activate which creates a really annoying noise in the pax headset. The same thing is true when the front PAX activates the PTT switch on the dash, the noise is heard in the pilots headset. So when flying fires, the firefighter sitting in the front PAX seats keeps talking to its crew on the ground while I keep hearing the noise in the headset which prevents me from hearing properly any coms from COM 1 or 2 (bird dog and/or other machines).....I do hear the coms but the noise is so strong that I loose much of what is being said. So I tried to change headsets, helmet, etc.......no luck. I tried shutting off the FM toggle switch on the combox(NAT AMS42) but the noise comes through anyways(more than likely from the COM1 and 2). I tried shutting off the VHF on COM 1 and then on COM2 but same thing happens.....I am clueless.... I remember having asked an engineer at a company I worked for a long time ago and he never found the problem. I had not flown fires for years so this problem didnt bug me that much....but now I find it a real pain in the butt.. Any help would be really appreciated. Thanks!! Mat 1 Quote Link to comment Share on other sites More sharing options...
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