XCOM 760 radio problem - Zenith Aircraft Builders and Flyers2024-03-29T09:27:56Zhttps://zenith.aero/forum/topics/xcom-760-radio-problem?xg_source=activity&feed=yes&xn_auth=noBest get wiring diagram from…tag:zenith.aero,2019-03-01:2606393:Comment:6674302019-03-01T01:39:25.901ZTom Hankamhttps://zenith.aero/profile/TomHankamp
<p>Best get wiring diagram from xcom and I am sure you will what error causing all problems, been too long since I did one to remember !Tom</p>
<p>Best get wiring diagram from xcom and I am sure you will what error causing all problems, been too long since I did one to remember !Tom</p> I noticed that as well as I w…tag:zenith.aero,2019-02-28:2606393:Comment:6675572019-02-28T16:54:33.204Zstephen hetzhttps://zenith.aero/profile/stephenhetz
<p>I noticed that as well as I was drawing the wiring diagram. Not sure that'll make any difference but I'll include #10 with the power.</p>
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<p>I noticed that as well as I was drawing the wiring diagram. Not sure that'll make any difference but I'll include #10 with the power.</p>
<p></p> My radio is the Flightline 76…tag:zenith.aero,2019-02-28:2606393:Comment:6673462019-02-28T05:59:26.580ZGary Welchhttps://zenith.aero/profile/GaryWelch
<p>My radio is the Flightline 760, so not exactly the same. I did a lot of research, especially over on the Vans Air Force website because those guys analyze everything to a gnats ass. All the advice I got there was to "run shielded wires or you'll have problems". When I asked Flightline directly they said "no need". </p>
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<p>I was skeptical but I ran mine un-shielded and the radio has worked perfectly. HOWEVER, I don't have a any kind of sophisticated avionics in my plane…</p>
<p>My radio is the Flightline 760, so not exactly the same. I did a lot of research, especially over on the Vans Air Force website because those guys analyze everything to a gnats ass. All the advice I got there was to "run shielded wires or you'll have problems". When I asked Flightline directly they said "no need". </p>
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<p>I was skeptical but I ran mine un-shielded and the radio has worked perfectly. HOWEVER, I don't have a any kind of sophisticated avionics in my plane either. </p>
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<p>FYI - getting my radio to work right did take quite a while. Damn PTT would not work at all. That is until I discovered a second ground wire missing....</p>
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<p>Good luck figuring this out. Wiring can be a PITA!</p>
<p></p> The official diagram shows po…tag:zenith.aero,2019-02-28:2606393:Comment:6674022019-02-28T05:51:38.719ZGary Welchhttps://zenith.aero/profile/GaryWelch
<p>The official diagram shows power going to both pin 9 & 10. Your diagram is only showing power to pin 9.</p>
<p>The official diagram shows power going to both pin 9 & 10. Your diagram is only showing power to pin 9.</p> Well, I'm definitely not an E…tag:zenith.aero,2019-02-27:2606393:Comment:6672302019-02-27T23:04:43.290Zstephen hetzhttps://zenith.aero/profile/stephenhetz
<p>Well, I'm definitely not an EE. I, in fact, do have all the grounds (from the jacks, the radio case) tied at one point to the 16 gauge black wire that goes to the negative terminal of the battery (remember, this setup is currently entirely independent from the airplane and just lays in my copilot seat. The jacks are laying free as well). I'm using Lightspeed 3 headphones and haven't tried another brand (I don't own another brand). As best I can tell, the jacks seem to be functioning…</p>
<p>Well, I'm definitely not an EE. I, in fact, do have all the grounds (from the jacks, the radio case) tied at one point to the 16 gauge black wire that goes to the negative terminal of the battery (remember, this setup is currently entirely independent from the airplane and just lays in my copilot seat. The jacks are laying free as well). I'm using Lightspeed 3 headphones and haven't tried another brand (I don't own another brand). As best I can tell, the jacks seem to be functioning properly as far as the mechanical aspect goes when the plugs are pushed in.</p>
<p>I also have been in contact with Michael from XCOM (via email from Australia. He has answered most of my emails within 15-20 minutes of when I send them during regular business times in Australia.). To quote him, a lot of properly setting up a radio is "witchcraft" and he strongly advised getting an avionics tech to look things over. Of course, I've done that (the avionics tech has been trying to help me fix this for several months). Michael at XCOM thinks the problem is my lack of proper shielded wiring. I suppose he must be right. It's puzzling, though. It seems to receive fine. But once I push the PTT button, it briefly transmits (I can hear "sidetone" in my headphones) but within a second or two, stops transmitting (based on others listening and the lack of sidetone in my earphones). I'll look at making my own connector and harness with shielded wiring, but will likely take the easy way out and order the harness from XCOM. And frankly, thanks for taking the time to try and help me puzzle through this. It makes sense to ask about even the most mundane process or procedure to make sure it hasn't been forgotten or missed. Any other suggestions are welcome. Thanks.</p>
<p></p> Are you tying all grounds to…tag:zenith.aero,2019-02-27:2606393:Comment:6673252019-02-27T15:46:29.859ZCarl Ortonhttps://zenith.aero/profile/CarlOrton
<p>Are you tying all grounds to a common point like a “forest of tabs?” Connecting any of the grounds to an assumed ground like the fuselage may produce issues. I know you stated you tied all grounds to the neg terminal, but just want to make sure HOW you did that. And no, you can’t just tie two grounds together at the panel then run one combined lead to the neg post. I know it sounds stupid but that can cause issues. Electricity is like water in that it takes the path of least resistance. You…</p>
<p>Are you tying all grounds to a common point like a “forest of tabs?” Connecting any of the grounds to an assumed ground like the fuselage may produce issues. I know you stated you tied all grounds to the neg terminal, but just want to make sure HOW you did that. And no, you can’t just tie two grounds together at the panel then run one combined lead to the neg post. I know it sounds stupid but that can cause issues. Electricity is like water in that it takes the path of least resistance. You may be an EE and know that, but WE don’t know what you know! Just trying to help. </p>
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<p>Have you tried removing both jacks from the panel to just hang free?</p>
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<p>have you tried a different headset? </p>
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<p>Are you you using an aviation headset? Different impedances could cause a prob. </p>
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<p>These may seem like simple questions like the computer tech asking if it’s plugged in, but we don’t know. You do appear to have wired it correctly, so we’re now just looking for stupid little nits that could cause issues. </p>
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<p>Last thought. Perhaps recheck the jacks once you remove them WITH the plugs inserted. Make sure the plug doesn’t push one of the other conductors against one of the other leads. </p> Steve,
On the Xcom site in t…tag:zenith.aero,2019-02-27:2606393:Comment:6674532019-02-27T00:47:43.383ZJEFF COCHRANhttps://zenith.aero/profile/JEFFCOCHRAN
<p>Steve, </p>
<p>On the Xcom site in the education section is a trouble shooting guide, step by step procedures for checking the wiring harness. See if that will help.</p>
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<p>Xcom is out of business now. I correspond with the owner recently and he said that the email would be shut down shortly. So I would copy anything off the website that might be helpful in case they shut that down also.</p>
<p>Jeff</p>
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<p>Steve, </p>
<p>On the Xcom site in the education section is a trouble shooting guide, step by step procedures for checking the wiring harness. See if that will help.</p>
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<p>Xcom is out of business now. I correspond with the owner recently and he said that the email would be shut down shortly. So I would copy anything off the website that might be helpful in case they shut that down also.</p>
<p>Jeff</p>
<p></p> Just found this DIY wiring di…tag:zenith.aero,2019-02-26:2606393:Comment:6673032019-02-26T01:43:34.630Zstephen hetzhttps://zenith.aero/profile/stephenhetz
<p>Just found this DIY wiring diagram on an XCOM avionics site: Comparing the below diagram to my above diagram, it looks to me that they are the same (I only wired the pilot jacks). I guess I'll keep playing with it until it reliably works.<a href="https://storage.ning.com/topology/rest/1.0/file/get/1203858763?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/1203858763?profile=RESIZE_710x" class="align-center"/></a></p>
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<p>Just found this DIY wiring diagram on an XCOM avionics site: Comparing the below diagram to my above diagram, it looks to me that they are the same (I only wired the pilot jacks). I guess I'll keep playing with it until it reliably works.<a href="https://storage.ning.com/topology/rest/1.0/file/get/1203858763?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/1203858763?profile=RESIZE_710x" class="align-center"/></a></p>
<p></p> Right now, it’s just set up f…tag:zenith.aero,2019-02-25:2606393:Comment:6672852019-02-25T17:38:03.559Zstephen hetzhttps://zenith.aero/profile/stephenhetz
<p>Right now, it’s just set up for the pilot. If I can get that to work, I’ll wire the copilot jacks. </p>
<p>Right now, it’s just set up for the pilot. If I can get that to work, I’ll wire the copilot jacks. </p> Swapping headsets and moving…tag:zenith.aero,2019-02-25:2606393:Comment:6671062019-02-25T07:05:23.651ZJim and Amelia Isaacshttps://zenith.aero/profile/JimIsaacs
<p>Swapping headsets and moving between pilot and passenger stations produces no changes?</p>
<p>Swapping headsets and moving between pilot and passenger stations produces no changes?</p>