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Alright can anyone help me I have a aereal pursuits helmet and when I am flying I am getting a lot of noise on the radio to the extent that people on the ground can"t hear me, has anyone got any ideas to get rid of the noise. I think most of the noise is from the wind and engine. On the ground the radio works fine.
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did you get the beard [face mask] with the helmut????
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What engine have you in your gyro?What radio are you using?Is your helmet and comms box compatible with your radio?Has your antenna an adequate ground plane?Are you supplying power via radio battery, or machine?Are all antenna connections and cable sound?Have you checked your transmit and receive signal with a SWR meter?Communications FAQ © 1996-2001 Raptor Designs Pty Ltd. (Last Update 28th February 2006) Answers to Frequently Asked Questions about ultralight/microlight aircraft communications As a manufacturer and supplier of intercoms and radio communications interfaces to the ultralight and microlight industry, we get occasional calls from folks with questions about intercom systems (both ours and other manufacturers) and radio communications. Here are the most common questions and our replies. Please feel free to contact us on +61-(0)3-95536445 if you have comments or questions! Index: Faint transmissions Best antenna position Antenna lengths Squealing in headsets The Icom A22 (or A3) VHF doesn"t work with my intercom My new Icom A6 or A24 radio squeals when I transmitI can"t hear my passenger very well on the intercom. There"s a lot of noise in the background with the engine running. The first question we always ask for any problem is: has it always been this way? If it was working fine before, then obviously something has changed for the worse. You should think about any changes to aircraft systems you"ve made about the time the problem started. Chances are, the change and the problem are related. If turning the intercom off doesn"t make any difference to the, background noise, then you probably need either a better set of headsets with better sound insulation, or a better muffler. If placing your hand over the microphones eliminates the problem, then either you have the volume of the intercom set too high, your lips are too far from the mikes, or both. Or it may be that the microphones are inferior - they should be quality noise cancelling units. On the volume front, the intercom volume should be set to the lowest level appropriate for clear communication, and when a radio is used, the squelch control should be appropriately set to trigger on reception only. Often, folks get tempted to put huge foam wind-shields on their mikes. However, noise cancelling mikes work best if the mike element is almost touching the lips, so a huge muff can make them ineffective simply by separating the mike and lips. In windy cockpits, you can use a big mike shield, but grind a flat on it on the side that faces the lips. The culprit could be a dirty DC supply line. This can be caused by bad contacts in plugs and switches, or it may be that your regulator is on the way to failing. If the problem has always been there, it may be you have a poor regulator. The standard Rotax regulator does not have a good reputation for clean DC output, hence the keen market for other regulator manufacturers.
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BazAerial Pursuits headsets have a mike gain adjustment that is set up from a small blue potentiometer in the headset. You need to pull out some of the foam padding to get at it. You need to turn the gain down. Set it up on the ground by adjusting the pot while transmitting. It will take a few attempts to get it spot on.Ross B
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ok sam.....baz i have the same helmet and the nose i find comes from the wind and engine when you duck into a turn or what ever , the ear muffs may not have enough pressure around your ears as to hold them in, i have the icom A22 radio , with a 2 place intercom set up and it requires a 9V battery and sometimes that might not be working to well, but it could also be dodgy wiring or bad connection ,cheers adrianp.s i have to put cotten wool in the ears to muffel the sound -
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Thanks everyone for your comments. I think Ross may be onto it. When I talk on the ground it sounds fine but whern in the air I am getting a lot of wind noise and my wife reckons I might be yelling into it. I have a pretty simple setup. I got Access electronics to wire me up a PTT box and I mainly use the UHF but I do have a Vortex VHF wired up as well so I can hear on both units and I flick a switch to talk on VHF or UHF. Can hear the planes in emerald but haven"t actually tried to talk on the VHF. No one around here to talk to. I mainly want the UHF working so I can abuse the people on the ground when they aren"t doing the right things. Will have a look at the headset tomorrow.
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Hi Baz, cant help much here but dont discard Earmoulds for the hearing part, greatest thing since sliced bread !!
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I can hear fine. It"s just that people can"t understand me. I know its not from the nerves, I stopped being nervous about 30 hours ago.
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I had same helmet with same issues and even the same icom handheld.
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What mic did you replace it with Disco?
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Well when i test
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OK, couldn"t find the potentiometer in the headset but while in rocky went to all the electronics shops and got about as much help from them as a carboard box. Bought myself a coiuple of tripots (potentiamoters) 200,500 and 1000k I think they were, but not sure if they need to be in series or parrallel. I assume they are just connected on the mic to try and filter some of the noise.
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Hold it Baz, before you start pulling things apart a couple of questions.On the ground when you press the *** to transmit, can you hear your own voice in the headsets. Is it crystal clear? Is your engine running during these tests. Are there any back ground noises like clicking or squealing? Whay happens to the noises when the engine is NOT running.And, how many wires are going to your mike? 2 or 3?Can you attach a piccie of your microphone and helmet setup?OK more than a couple of questions but this is going to be tricky to solve - you"re in FNQ and I"m in WA. Lets see how far we can get with a process of elimination.
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No I don"t hear my own voice but I am using a UHF and I believe this is normal. On the ground with engine running low I can transmitt fine is is only when I am flying with engine doing 4-5000 revs that they can;t understand me. I haven"t go anyone close to try the VHF. So on the ground with or without engine running transmitts fine and others can understand me fine. The mic has only 2 wires going to it. Any help is appreciated.
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Baz, I had the same helmet as you"rs and had all the drama"s in the world with it. Wasted **** loads of coin on it. Then was told to ring Ross in Broken Hill. Problem sorted. He reckons its the mic. It was a lectrical one in the aerial pursuits helmet. He reckons they just don"t work. Dynamic, i think, was the way to go he said. I had an icom radio that needed a lec mic. So I sent him a moto helmet and he wired it up to a Uniden radio. I"m running those ear mould plugs as speakers, thanks Brian, and they work deadly. Wish I knew all this 12 months ago. Anyway, ring Rossco. Gus
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