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rv7a.builder(at)yahoo.com
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 Posted: Thu Aug 04, 2016 1:29 pm Post subject: Adding a 2nd radio to my 403MC flightcom |
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Hello Group, I would like to add a 2nd radio to my Flightcom 403mc without installing an audio panel. I think if I use a switch to separate the mike key and mike audio between the 2 radios for transmitting purposes that would work, but can I just turn down the volume on either radio instead of separating the phone audio? If I am listening to atis on one radio and then a transmission comes in on the other will there be an overload problem? Thanks John Robinson RV-7A 90 hours.
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user9253
Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan
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| Posted: Thu Aug 04, 2016 4:07 pm Post subject: Re: Adding a 2nd radio to my 403MC flightcom |
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Do you want to listen to both radios at the same time or only one at a time?
Do you intend to listen to music or other audio on the aux input, pin 18?
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Joe Gores |
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rv7a.builder(at)yahoo.com
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| Posted: Thu Aug 04, 2016 5:15 pm Post subject: Adding a 2nd radio to my 403MC flightcom |
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Listen to both when trying to pick up atis.
Sent from my T-Mobile 4G LTE Device
-------- Original message --------
From: user9253 <fransew(at)gmail.com>
Date: 8/4/16 5:07 PM (GMT-08:00)
To: aeroelectric-list(at)matronics.com
Subject: AeroElectric-List: Re: Adding a 2nd radio to my 403MC flightcom
--> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com>
Do you want to listen to both radios at the same time or only one at a time?
Do you intend to listen to music or other audio on the aux input, pin 18?
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=459219#459219
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user9253
Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan
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| Posted: Thu Aug 04, 2016 6:21 pm Post subject: Re: Adding a 2nd radio to my 403MC flightcom |
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The audio output from two radios should not be connected together without some kind of isolation.
The audio from the second radio could connect to pin 18 on the intercom, the music aux input. But switching the intercom to "isolate" will disable it.
Audio input on pin 21 will mute the audio input on pm 18 unless the wire connected to pin 24 is cut.
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Joe Gores |
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rv7a.builder(at)yahoo.com
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| Posted: Fri Aug 05, 2016 4:10 am Post subject: Adding a 2nd radio to my 403MC flightcom |
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Thanks Joe for the input. I have a 2nd belly antenna which has coax coming into the cockpit and is set up for my handheld in case my one and only GNC300XL fails. It would be nice if the GNC300XL had a feature to allow monitoring of the standby frequency but it doesn't. If I install my 2nd radio it would have its own antenna. Perhaps installing a 2-50 switch for the audio, on-on-(on), com 1, com 2, and using the spring loaded (on) as both audio to listen to ATIS or whatever? I know when I use to rent Cessna's, the audio panel would have a "both" switch that I would use when I wanted to listen to ATIS without leaving the other controller. I just don't know what goes on in an audio panel that makes it safe to listen to both audios and why I could not do it without an audio panel? Thanks for any additional advice.
From: user9253 <fransew(at)gmail.com>
To: aeroelectric-list(at)matronics.com
Sent: Thursday, August 4, 2016 7:21 PM
Subject: AeroElectric-List: Re: Adding a 2nd radio to my 403MC flightcom
--> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)>
The audio output from two radios should not be connected together without some kind of isolation.
The audio from the second radio could connect to pin 18 on the intercom, the music aux input. But switching the intercom to "isolate" will disable it.
Audio input on pin 21 will mute the audio input on pm 18 unless the wire connected to pin 24 is cut.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=459221#459221= - The AeroElectric-List Email Forum -avigator?AeroElectric-List" target="_blank">http://www.matronics.com/Navi========================http://========================
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