RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > Service Specific Monitoring > Aircraft Monitoring Forum


Aircraft Monitoring Forum - This is the place to discuss monitoring civilian aircraft communications.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 06-13-2018, 3:16 PM
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Dec 2002
Location: Buffalo, New York
Posts: 77
Default Using airliner antenna as a scanner antenna for airband?

I have obtained an old airline fin VHF antenna, was wondering if anyone has used as a receiving antenna and whether they would work decently?
Reply With Quote
Sponsored links
  #2 (permalink)  
Old 06-13-2018, 3:22 PM
Member
   
Join Date: Nov 2005
Location: JoCo, KS (SoDak native)
Posts: 309
Default Aircraft antenna

Should work Ok, but....

The are designed to use with a ground plane (think lots of aluminum skin).

You probably don't need all the mounting screws (3-4 should be plenty in a non aircraft use)

You might need an adapter at the antenna (depends on what your coax has)

$.02
Reply With Quote
  #3 (permalink)  
Old 06-13-2018, 3:57 PM
737mech's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Aug 2006
Location: Clark County, NV.
Posts: 1,624
Default Airplane Antennas

I've done it, they work if you have a plate under them as mentioned above. Rule of thumb the plate needs to be larger than the antenna if it tipped over on it's side. As a matter of fact I'm using a sensor systems l-band for ADS-B tracking. A long time ago there was posts about the very cool AT-256A/ARC. As noted you may need adaptors for the coax connector depending on what you have. VHF will be good, don't expect much out of band from those. Worth the try and fun project.
Reply With Quote
  #4 (permalink)  
Old 06-13-2018, 4:26 PM
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Dec 2002
Location: Shippensburg, PA
Posts: 203
Default

Why not just get a discone. When you go to an airport you see a lot of discones.
Reply With Quote
  #5 (permalink)  
Old 06-13-2018, 4:33 PM
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jan 2010
Location: Ponchatoula, Louisiana USA
Posts: 156
Default

Use a decent ground plane and the proper coax adapters, and settle in in your listening post at 30,000 feet...should offer excellent reception <g>.
Reply With Quote
Sponsored links
  #6 (permalink)  
Old 06-13-2018, 5:54 PM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Aug 2003
Location: Peoria, AZ.
Posts: 3,352
Default

Years ago, I saw a Chevy Suburban pull into the Phoenix HRO parking lot sporting several aircraft style blade antennas.
I don't know how well they worked for whatever radios they were connected to, but it's been done mobile, at least.

John
Peoria, AZ
Reply With Quote
  #7 (permalink)  
Old 06-13-2018, 8:56 PM
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Dec 2002
Location: Buffalo, New York
Posts: 77
Default

Thanks, I actually have a discone and that is my antenna of choice. just have had this VHF airplane antenna sitting around in my junk box for a few years and figured I'd make use of it.
Reply With Quote
  #8 (permalink)  
Old 06-13-2018, 8:57 PM
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Dec 2002
Location: Buffalo, New York
Posts: 77
Default

Thanks, I'll have to check what the connection is on the end, if I recall correctly it was BNC.
Reply With Quote
  #9 (permalink)  
Old 06-13-2018, 9:07 PM
majoco's Avatar
Member
  Shack Photos
Shack photos
 
Join Date: Dec 2008
Location: New Zealand
Posts: 2,671
Default

Most of those fin type antennas are a simple quarter wave ground plane - the element is probably shortened with a loading coil on a piece of printed circuit board. "N" sockets are the usual standard. There is no need for any great sensitivity - once the aircraft gets over say 5000ft then signal strength is no problem. The ground stations tend to be around 25watts and so do the larger aircraft with Collins gear, small turboprops may be 12watts with the King Air/Bendix equipment. I can hear aircraft descending into Rotorua from home, a distance of about 180 miles on a discone into a BCT8. Probably a better antenna if you can get one is the localiser antenna commonly called a 'ramshorn' which was mounted over the cockpit on the centreline, like this one on one of our Calibration aircraft. We checked for minimum signal levels from ground stations and they had to be more than 10uV in the stated coverage areas - we used an Ailtech NM-37/57A field intensity meter which I just happen to have at home - found on our local auction site for NZ$120!
Attached Images
 
__________________
Cheers - Martin ZL2MC - Palmerston North

Last edited by majoco; 06-13-2018 at 9:12 PM..
Reply With Quote
  #10 (permalink)  
Old 06-13-2018, 9:19 PM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Aug 2003
Location: Peoria, AZ.
Posts: 3,352
Default

That looks like one of those boomerang shaped TV antennas that were marketed for mobile use.

And the OP said the blade/fin antenna he has had been sitting in his junk box, and he wants to make use of it.

John
Peoria, AZ
Reply With Quote
  #11 (permalink)  
Old Yesterday, 4:34 AM
Member
   
Join Date: May 2009
Posts: 2,073
Default

Some aircraft use slot antennas - you may want to try one of those just for kicks if you have some spare metal surfaces sitting around.

John Portune, W6NBC has a nice article on how to make one out of a used sat-dish, although he had to bend the dipole slot element. Cut for 2 meters, it could easily be lengthened just a little for vhf airband:

http://w6nbc.com/articles/20xx-dishslot.pdf

Basically everything is backwards. The horizontal slot is vertically polarized. A low impedance feedpoint is near the ends, not in the middle. And of course the empty slot.

Just in case you have some spare aluminum sheet in the junkbox lying around.....
Reply With Quote
  #12 (permalink)  
Old Yesterday, 7:41 AM
DaveNF2G's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jan 2001
Location: Rensselaer, NY
Posts: 8,767
Default

Railroad antennas are similar and they work well at ground level.
__________________
David T. Stark
NF2G WQMY980 KYR7128
ARRL VE & Registered Licensing Instructor
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 10:16 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
All information here is Copyright 2012 by RadioReference.com LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2015 by RadioReference.com LLC Privacy Policy  |  Terms and Conditions