---------------------------------------------------------- Avionics-List Digest Archive --- Total Messages Posted Sun 01/14/18: 11 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:22 PM - Intercom feedback at low rpm (Rebel56) 2. 05:23 PM - Intercom feedback at low rpm (Rebel56) 3. 06:26 PM - Re: Intercom feedback at low rpm (fherr) 4. 06:28 PM - Re: Intercom feedback at low rpm (Kelly McMullen) 5. 06:32 PM - Re: Intercom feedback at low rpm (Charlie England) 6. 06:34 PM - Re: Intercom feedback at low rpm (Rebel56) 7. 06:38 PM - Re: Re: Intercom feedback at low rpm (Kelly McMullen) 8. 06:39 PM - Re: Intercom feedback at low rpm (Rebel56) 9. 06:41 PM - Re: Intercom feedback at low rpm (Rebel56) 10. 06:47 PM - Re: Re: Intercom feedback at low rpm (Charlie England) 11. 06:53 PM - Re: Intercom feedback at low rpm (Rebel56) ________________________________ Message 1 _____________________________________ Time: 05:22:53 PM PST US Subject: Avionics-List: Intercom feedback at low rpm From: "Rebel56" Recently I have started hearing static feedback from the intercom during taxi and low rpm such as landing. the noise goes away during flight when rpms are up.. Have been flying for over 100 hours with no trouble, until now. Flightcom 2 person intercom, viking honda engine on a Murphy Rebel. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477287#477287 ________________________________ Message 2 _____________________________________ Time: 05:23:06 PM PST US Subject: Avionics-List: Intercom feedback at low rpm From: "Rebel56" Recently I have started hearing static feedback from the intercom during taxi and low rpm such as landing. the noise goes away during flight when rpms are up.. Have been flying for over 100 hours with no trouble, until now. Flightcom 2 person intercom, viking honda engine on a Murphy Rebel. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477288#477288 ________________________________ Message 3 _____________________________________ Time: 06:26:53 PM PST US Subject: Re: Avionics-List: Intercom feedback at low rpm From: fherr How is your battery - holding a charge and in good condition otherwise? On Jan 14, 2018, at 8:22 PM, Rebel56 wrote: Recently I have started hearing static feedback from the intercom during taxi and low rpm such as landing. the noise goes away during flight when rpms are up.. Have been flying for over 100 hours with no trouble, until now. Flightcom 2 person intercom, viking honda engine on a Murphy Rebel. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477287#477287 ________________________________ Message 4 _____________________________________ Time: 06:28:05 PM PST US Subject: Re: Avionics-List: Intercom feedback at low rpm From: Kelly McMullen Do you have a cigar lighter to USB adapter anywhere in the cockpit? For an Ipad or Iphone, etc? On 1/14/2018 6:22 PM, Rebel56 wrote: > > Recently I have started hearing static feedback from the intercom during taxi and low rpm such as landing. the noise goes away during flight when rpms are up.. Have been flying for over 100 hours with no trouble, until now. Flightcom 2 person intercom, viking honda engine on a Murphy Rebel. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=477288#477288 > > > > > > > > > ________________________________ Message 5 _____________________________________ Time: 06:32:38 PM PST US Subject: Re: Avionics-List: Intercom feedback at low rpm From: Charlie England On 1/14/2018 7:22 PM, Rebel56 wrote: > > Recently I have started hearing static feedback from the intercom during taxi and low rpm such as landing. the noise goes away during flight when rpms are up.. Have been flying for over 100 hours with no trouble, until now. Flightcom 2 person intercom, viking honda engine on a Murphy Rebel. Need to be more specific describing the symptoms. Feedback (usually a squeal or howl) is very different from static, and static can be a lot of different sounds. Is it more of a whine, that changes pitch with rpm? (likely failing diodes in the alternator) Is it a crackling buzz? Does it really go away, or can you just not hear it over the increased noise in the cockpit at higher power settings? --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 6 _____________________________________ Time: 06:34:54 PM PST US Subject: Avionics-List: Re: Intercom feedback at low rpm From: "Rebel56" Battery is in good condition and holds charge. I have two cigarette lighter adapters, one on each side of the panel. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477295#477295 ________________________________ Message 7 _____________________________________ Time: 06:38:25 PM PST US Subject: Re: Avionics-List: Re: Intercom feedback at low rpm From: Kelly McMullen Some USB or mini-USB adapters are bad offenders in the static generation business. On 1/14/2018 7:34 PM, Rebel56 wrote: > > Battery is in good condition and holds charge. > > I have two cigarette lighter adapters, one on each side of the panel. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=477295#477295 > > > > > > > > > ________________________________ Message 8 _____________________________________ Time: 06:39:17 PM PST US Subject: Avionics-List: Re: Intercom feedback at low rpm From: "Rebel56" Been a while since I flew, but I think it could be both, a slight whine, and static. I can quiet it with the squelch, but doing so also quiets all radio traffic. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477297#477297 ________________________________ Message 9 _____________________________________ Time: 06:41:41 PM PST US Subject: Avionics-List: Re: Intercom feedback at low rpm From: "Rebel56" Thanks kellym, I had thought of that as well, and tried unplugging the usb adapter - but no change. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477300#477300 ________________________________ Message 10 ____________________________________ Time: 06:47:44 PM PST US Subject: Re: Avionics-List: Re: Intercom feedback at low rpm From: Charlie England On 1/14/2018 8:39 PM, Rebel56 wrote: > > Been a while since I flew, but I think it could be both, a slight whine, and static. I can quiet it with the squelch, but doing so also quiets all radio traffic. Who were you answering? (Need to quote the person you're replying to, if there are multiple possibilities.) If it was me, does it change frequency with engine rpm? --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 11 ____________________________________ Time: 06:53:24 PM PST US Subject: Avionics-List: Re: Intercom feedback at low rpm From: "Rebel56" [quote="ceengland7(at)gmail.com"]On 1/14/2018 8:39 PM, Rebel56 wrote: > > > Been a while since I flew, but I think it could be both, a slight whine, and static. I can quiet it with the squelch, but doing so also quiets all radio traffic. > Who were you answering? (Need to quote the person you're replying to, if > there are multiple possibilities.) If it was me, does it change frequency with engine rpm? --- It might change frequency ever so slightly, bu the static is constant and loud. 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