Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Portable Transponder

Matronics Email Lists Forum Index -> Avionics-List

View previous topic :: View next topic

Author Message

bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Thu Mar 22, 2012 7:03 pm Post subject: Portable Transponder

3/2/2012



Hello John Cammarano, I hope that this helps solve your problem.



'OC' Baker



==================================================================

From: "John Delafield" <john.delafield(at)lxavionics.co.uk>

To: <bakerocb(at)cox.net>

Sent: Thursday, March 22, 2012 4:15 PM

Subject: RE: Portable Transponder

 	  Quote: 	
		   Dear Sir,



 We assemble the transponder box using a certified TT 21 or 22 which has 

 FAA

 approval so no worries there.  The entire box is not approved by anyone 

 but

 as it is portable I do not think it necessary anyway.



 The altitude encoder is built in to the transponder and it meets the new

 25ft spacing requirement.



 I am pretty sure for your application that you would not need the very

 expensive hand made leather case that we normally provide and not having

 this would reduce the price to you by about $200.



 Lead time for delivery would be a few weeks.



 I very much hope that we can help you,



 All the best,



 John Delafield

 LX avionics Ltd

 07850 950349/01865 374125

 www.lxavionics.co.uk

 Company Number 4417407 Registered in England and Wales

 VAT GB 793 1777 86

 Registered address (NOT FOR BUSINESS): 30 St Giles, Oxford




	


=======================================================

 From: bakerocb(at)cox.net [mailto:bakerocb(at)cox.net]

 	  Quote: 	
		   Sent: 22 March 2012 15:42

 To: johnd(at)lxavionics.co.uk

 Subject: Portable Transponder



 3/22/2012



 Hello John, We are seeking a portable airtraffic radar transponder for use

 in a small homebuilt (no electrical power) fixed wing airplane in the US.

 Your products seen here:



 http://www.lxavionics.co.uk/portables.htm



 appear to offer a solution.



 I have two questions:



 1) How is the information normally provided to a transponder by an 

 altitude

 encoder for automatic altitude information transmission by the transponder

 provided for in your products?



 2) Are you aware of any regulatory reason (TSO or inspection requirements)

 that would make your products not be acceptable for use in the United

 States?



 Thanks for your help,



 'OC' Baker Says: "The best investment we can make is the time and effort 

 to

 gather and understand knowledge."

- The Matronics Avionics-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Avionics-List

jessevli(at)zeelandnet.nl
Guest

Posted: Fri Mar 23, 2012 3:40 am Post subject: Portable Transponder

I would suggest to use an external antenna with a good groundplane. It doubt the VSWR is very good the way when it is directly connected (however Trig products will give an error when the VSWR is very high).  

  

Another point to think of is the high peak power that a transponder is transmitting (about 125 or 250 Watt depending on class) The pulse duration is only short, lowering the average power. My transponder test equipement suggest to take a distance of at least to meter to reduce field strength your exposed to during transponder field testing. 

  

When the antenna is directly on the unit you will be likely close to the antenna. Some scientist say that exposure to high level RF fields is not dangerous, while other doubt this, I think it is better to take some distance from the antenna to reduce the field strength at your seating position.  

  

Jesse 

   

    [quote][b]

- The Matronics Avionics-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Avionics-List

Display posts from previous:

	Matronics Email Lists Forum Index -> Avionics-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum