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                           Avionics-List Digest Archive
                                      ---
                     Total Messages Posted Fri 03/11/05: 3
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Today's Message Index:
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     1. 10:05 AM - dual nav-comms  (Bob White)
     2. 01:24 PM - Re: dual nav-comms  (Doug McNutt)
     3. 02:58 PM - Re: dual nav-comms  (F. ILMAIN)
 
 
 
________________________________  Message 1  _____________________________________


Time: 10:05:35 AM PST US
From: "Bob White" <bob@whitek.com>
Subject: Avionics-List: dual nav-comms

--> Avionics-List message posted by: "Bob White" <bob@whitek.com>

When one is using dual nav-comms, I'm guessing that the comms each get an
antenna, since most airplanes have two antennas on top of the wing.  But
they only have one nav antenna on top of the vertical stabilizer.  So how do
the two nav receivers share the antenna?  A splitter like in cable tv?  I
haven't seen such a device in avionics catalogs.
Thanks,
Bob White






________________________________  Message 2  _____________________________________


Time: 01:24:32 PM PST US
From: Doug McNutt <douglist@macnauchtan.com>
Subject: Re: Avionics-List: dual nav-comms

--> Avionics-List message posted by: Doug McNutt <douglist@macnauchtan.com>

At 10:06 -0800 3/11/05, Bob White wrote:
>--> Avionics-List message posted by: "Bob White" <bob@whitek.com>
>
>When one is using dual nav-comms, I'm guessing that the comms each get an
>antenna, since most airplanes have two antennas on top of the wing.

You guessed right. Each TRANSMITTER requires its own antenna.

>  But
>they only have one nav antenna on top of the vertical stabilizer.  So how do
>the two nav receivers share the antenna?  A splitter like in cable tv?

Yep. And sometimes the splitter also offers an output for a glideslope receiver.

>haven't seen such a device in avionics catalogs.

They're there. They look just like cable TV splitters except they will have BNC
rather than type F connectors. Under the instrument panel is a place to look.

-- 
-->  The best programming tool is a soldering iron <--






________________________________  Message 3  _____________________________________


Time: 02:58:58 PM PST US
From: "F. ILMAIN" <f_ilmain@hotmail.com>
Subject: Re: Avionics-List: dual nav-comms

--> Avionics-List message posted by: "F. ILMAIN" <f_ilmain@hotmail.com>


You need to look for Diplexers

Info can be found on the Comant web site

http://www.comant.com/

Hope this helps

Franck


>From: Doug McNutt <douglist@macnauchtan.com>
>Reply-To: avionics-list@matronics.com
>To: avionics-list@matronics.com
>Subject: Re: Avionics-List: dual nav-comms
>Date: Fri, 11 Mar 2005 14:23:37 -0700
>
>--> Avionics-List message posted by: Doug McNutt <douglist@macnauchtan.com>
>
>At 10:06 -0800 3/11/05, Bob White wrote:
> >--> Avionics-List message posted by: "Bob White" <bob@whitek.com>
> >
> >When one is using dual nav-comms, I'm guessing that the comms each get an
> >antenna, since most airplanes have two antennas on top of the wing.
>
>You guessed right. Each TRANSMITTER requires its own antenna.
>
> >  But
> >they only have one nav antenna on top of the vertical stabilizer.  So how 
>do
> >the two nav receivers share the antenna?  A splitter like in cable tv?
>
>Yep. And sometimes the splitter also offers an output for a glideslope 
>receiver.
>
> >haven't seen such a device in avionics catalogs.
>
>They're there. They look just like cable TV splitters except they will have 
>BNC rather than type F connectors. Under the instrument panel is a place to 
>look.
>
>--
>-->  The best programming tool is a soldering iron <--
>
>