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Antenna Question

 
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mike(at)vision499.com
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PostPosted: Thu May 03, 2018 2:48 pm    Post subject: Antenna Question Reply with quote

Would it create a problem if the transponder and com antennas are close to each other?

Thanks

Mike

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BARRY CHECK 6



Joined: 15 Mar 2011
Posts: 659

PostPosted: Thu May 03, 2018 4:44 pm    Post subject: Antenna Question Reply with quote

Mike:
Do you have the ability to bench check the configuration before instlation?
Manufactures usually ask for 36" to 48" separation between antennas.  
The transponder has an output of 100 to 310 Watts.  That is a lot of signal to handle when close to another antenna.  
You can usually move the transponder antenna forward just ahead of the landing gear.  May be difficult to do with a tail dagger???  But, the transponder is an output device not a receive device so noise is not an issue, so forward works well.  The Comm antenna - Well,  noise is an issue, separation is mandatory.
Barry


On Thu, May 3, 2018 at 6:47 PM, <mike(at)vision499.com (mike(at)vision499.com)> wrote:
Quote:

 
Would it create a problem if the transponder and com antennas are close to each other?
 
Thanks
 
Mike



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alec(at)alecmyers.com
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PostPosted: Thu May 03, 2018 5:19 pm    Post subject: Antenna Question Reply with quote

Define “close”, and define “problem”.

COM radios and tranponders use very different frequency bands.

I don’t think you’re going to find anyone to guarantee no problems, but depending on what “close” means, my inexpert gut feeling it’s unlikely.
It’s possible that you might hear a faint ticking noise on the radio while the transponder is powered.

On May 3, 2018, at 6:47 PM, <mike(at)vision499.com> <mike(at)vision499.com> wrote:


Would it create a problem if the transponder and com antennas are close to each other?

Thanks

Mike

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