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two com radios

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JOHN TIPTON

Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England

Posted: Thu Jul 25, 2013 11:11 pm Post subject: two com radios

Hi Guys (Bob)



I'd like to fit 2 x radio coms, I don't want or need a full 'audio panel' 

what are my options, I guess I really need is some kind of sophisticated 

change-over switch



John

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bob.verwey(at)gmail.com
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Posted: Thu Jul 25, 2013 11:18 pm Post subject: two com radios

Intercom?

On 26 July 2013 09:07, JOHN TIPTON <jmtipton(at)btopenworld.com (jmtipton(at)btopenworld.com)> wrote:

 [quote]--> AeroElectric-List message posted by: "JOHN TIPTON" <jmtipton(at)btopenworld.com (jmtipton(at)btopenworld.com)>

  

 Hi Guys (Bob)

 

 I'd like to fit 2 x radio coms, I don't want or need a full 'audio panel' what are my options, I guess I really need is some kind of sophisticated change-over switch

 

 John 

 

 

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 http://forums.matronics.com

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 ="_blank">http://www.matronics.com/contribution

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nuckollsr

Joined: 24 Mar 2009
Posts: 95
Location: Medicine Lodge, KS

Posted: Fri Jul 26, 2013 7:00 am Post subject: Re: two com radios

There are a number of options. Suggest you review the chapter on audio systems and then come back for necessary clarification on selection of a solution.



Bob . . .

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toddheffley

Joined: 24 Mar 2010
Posts: 8
Location: Fort Worth Texas

Posted: Sat Jul 27, 2013 10:15 am Post subject: Re: two com radios

John



I wonder if you have considered an alternative solution to a installed second com?



My experience with hand crafted audio control systems has been 100% negative,,,, meaning poorly thought out, no documentation, making repair a puzzling endeavor.



My favorite set up for a VFR/CrossCountry/LightIFR  aircraft is:



ONE com. The best quality you can afford. CI122 antenna on the belly, Meaning a REAL antenna, not just a cheapy 1/4 wave stick, not a internal antenna.  Best practices on coax termination and so forth.  Carefully think through Bob's well documented Zdiagrams to give the unit the bast chance of rock solid power + some type of Plan B power.



A intercom correctly installed with the direct Mic/Phone jacks wired,  as well as the Pilot/Copilot/Pax  mic/phone jacks. NAT is my favorite, but that is because I am a snob.



My point  is, put most of you eggs in that basket and make that basket FIRST RATE.



Secondly,  a backup com system that is a REAL backup.



Meaning, a handheld radio, SOLIDLY afix the panel or side wall. Separate mic and phone jacks wired ONLY to the handheld. A DEDICATED 2nd com antenna hooked directly to the handheld.



FRESH batteries, and/or Fresh spare batteries in the flight bag.



This approach gets rid of the audio panel, a single point of failure, and divides the cost of the second com in half.



I recommend this after YEARS of working on light aircraft with poorly maintained, 2nd rate avionics.



Best wishes for you and your project.



Todd

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_________________
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www.theinterconnectco.com for lighting products
AV-TS.com for Jet Aircraft Test Equipment

nuckolls.bob(at)aeroelect
Guest

Posted: Sat Jul 27, 2013 7:36 pm Post subject: two com radios

At 02:07 AM 7/26/2013, you wrote:

 	  Quote: 	
		  

<jmtipton(at)btopenworld.com>



Hi Guys (Bob)



I'd like to fit 2 x radio coms, I don't want or need a full 'audio 

panel' what are my options, I guess I really need is some kind of 

sophisticated change-over switch



John


	


   Have you considered 1 comm radio and a hand-held?

   My flight bag always carried this constellation of

   back-ups . . . even when I was flying an A36 with

   all the goodies.



http://tinyurl.com/d5mrjgh



   The nice thing about this line-up is that it's

   totally independent of the airplane's electrical

   system no matter which airplane you're flying.



   Bob . . .

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uuccio(at)gmail.com
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Posted: Sat Jul 27, 2013 9:46 pm Post subject: two com radios

On Jul 28, 2013, at 5:35, "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com> wrote:



 	  Quote: 	
		   

 

  Have you considered 1 comm radio and a hand-held?

  My flight bag always carried this constellation of

  back-ups . . . even when I was flying an A36 with

  all the goodies.

 

 http://tinyurl.com/d5mrjgh

 

  The nice thing about this line-up is that it's

  totally independent of the airplane's electrical

  system no matter which airplane 


	


Bob, 



With this setup (in your own airplane) would you recommend:



A) connecting the handheld antenna to the aircraft com antenna (if so, how? Dave mentioned in a previous post a that you had a setup specifically designed for that with what sounded like an antenna splitter, but I could not find details on your website)



B) wiring the PTT and Rx/Txs of the handheld through the audio panel as com2 (if there is a simple way to do this, not sure... But the idea would be that the handheld functions exactly like a normal com2). 



Sacha

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uuccio(at)gmail.com
Guest

Posted: Sat Jul 27, 2013 9:48 pm Post subject: two com radios

Sorry I just realized that John does not need/want an audio panel, I didn't mean to high jack the thread...

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bob.verwey(at)gmail.com
Guest

Posted: Mon Jul 29, 2013 6:10 am Post subject: two com radios

Todd, thanks for the heads up on an issue I would never have considered from that point of view!



Just wrestling with the whole 2 comms/intercom problem at the moment. You just made it easier!

 



Bob Verwey

A35 Bonanza ZU-DLW

Safari ZU- AJF



On 27 July 2013 20:15, toddheffley <public(at)toddheffley.com (public(at)toddheffley.com)> wrote:

 [quote]--> AeroElectric-List message posted by: "toddheffley" <public(at)toddheffley.com (public(at)toddheffley.com)>

  

 John

 

 I wonder if you have considered an alternative solution to a installed second com?

 

 My experience with hand crafted audio control systems has been 100% negative,,,, meaning poorly thought out, no documentation, making repair a puzzling endeavor.

 

 My favorite set up for a VFR/CrossCountry/LightIFR  aircraft is:

 

 ONE com. The best quality you can afford. CI122 antenna on the belly, Meaning a REAL antenna, not just a cheapy 1/4 wave stick, not a internal antenna.  Best practices on coax termination and so forth.  Carefully think through Bob's well documented Zdiagrams to give the unit the bast chance of rock solid power + some type of Plan B power.

  

 A intercom correctly installed with the direct Mic/Phone jacks wired,  as well as the Pilot/Copilot/Pax  mic/phone jacks. NAT is my favorite, but that is because I am a snob.

 

 My point  is, put most of you eggs in that basket and make that basket FIRST RATE.

 

 Secondly,  a backup com system that is a REAL backup.

 

 Meaning, a handheld radio, SOLIDLY afix the panel or side wall. Separate mic and phone jacks wired ONLY to the handheld. A DEDICATED 2nd com antenna hooked directly to the handheld.

 

 FRESH batteries, and/or Fresh spare batteries in the flight bag.

 

 This approach gets rid of the audio panel, a single point of failure, and divides the cost of the second com in half.

 

 I recommend this after YEARS of working on light aircraft with poorly maintained, 2nd rate avionics.

 

 Best wishes for you and your project.

 

 Todd

 

 --------

 WWW.toddheffley.com

 www.theinterconnectco.com for lighting products

 AV-TS.com for Jet Aircraft Test Equipment

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=405436#405436

 

 

 

 

 

 

 

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 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 [b]

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