REFLECTOR: Transponder Antenna

Andy Millin amillin at sbcglobal.net
Wed Aug 15 13:15:20 CDT 2007


Bruce,

 

I'm building the XL/FG.  Do you have any pictures of your installation?
Which antenna did you use?

 

Thanks,

 

Andy

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of bdtopp at comcast.net
Sent: Wednesday, August 15, 2007 11:33 AM
To: Velocity Aircraft Owners and Builders list; Velocity Aircraft Owners and
Builders list
Subject: Re: REFLECTOR: Transponder Antenna

 

The most common example of line of sight blocking mentioned by Scott below
would be..  An antenna mounted somewhere forward in the fuselage and you
climb out away from the ground antenna.  There is potential that the
firewall will block the signal.  Mounting the antenna in the strakes could
interfere with signal in turns (other folks discussed this option).  Best
position to mount antenna is in the bottom aft of fuselage as Scott mentions
below.  I mounted mine between gear bulkhead and firewall on fuselage floor.
I had room there since I have a FG.

 

Bruce Topp

 

-------------- Original message -------------- 
From: Scott Derrick <scott at tnstaafl.net> 
he standard EZ location is right below the rear seat.  The entire rear seat
pan is covered with aluminum for the ground plane and to shield the rear
occupant from the RF.  The minimum ground plane is a 8 inch diameter circle
or octagon. 

In side or out of the fiberglass makes no difference to the radio waves,
however if its inside something else inside that is made of metal could
block its line of sight path to the ground antenna. In other words if inside
don't mount it near something that would impede its sight to the ground at a
reasonable angle. 

Scott

Emanuel Lewis wrote: 

I wrote a few weeks ago asking about best location for a transponder
antenna.  I have a new "sharkfin" type antenna I plan to locate under the
copilot seat.  Does anyone have information/experience about the difference
in performance if the antenna penetrates the fuselage so that its surface is
outside vs. mounted inside the fuselage?  Also, how about the size of the
aluminum plate that serves as a ground plane?

Thanks,

Manny Lewis

 




  _____  



 
_______________________________________________
To change your email address, visit
http://www.tvbf.org/mailman/listinfo/reflector
 
Visit the gallery!  www.tvbf.org/gallery
user:pw = tvbf:jamaicangoose
Check new archives: www.tvbf.org/pipermail
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html





-- 
 
-
    The antidote for misuse of freedom of speech is more freedom of speech.
 
    Molly Ivans 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.tvbf.org/mailman/private/reflector/attachments/20070815/2f8b79e0/attachment.htm 


More information about the Reflector mailing list