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Too many GPS puck antennas



 
 
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  #11  
Old January 11th 20, 10:21 PM posted to rec.aviation.soaring
Steve Koerner
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Posts: 430
Default Too many GPS puck antennas

This has all been discussed here before. It's a bunch of over-conservative silliness about puck spacing. I actually did testing with different pucks touching each other and they all worked fine. It's better to use the puck supplied with the individual instrument as that introduces less opportunity for something to go wrong. And, if something does go wrong, lesser permutations as to cause.
  #12  
Old January 11th 20, 11:03 PM posted to rec.aviation.soaring
JS[_5_]
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Posts: 624
Default Too many GPS puck antennas

On Saturday, January 11, 2020 at 12:34:19 PM UTC-8, Eric Greenwell wrote:
wrote on 1/11/2020 9:49 AM:
What brand/model 12v GPS antenna is being used, reasons?


The ones supplied with Powerflarm core, Cambridge 302, and ClearNav. Later, I
removed the 302 and put in a Butterfly vario, using it's supplied GPS antenna.
Everything seemed to work the same.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1


The antennas included with glider instruments aren't good to 12v. Give them a try at 9-12v and report how long they last.
Jim
  #13  
Old January 12th 20, 12:29 AM posted to rec.aviation.soaring
Richard Pfiffner[_2_]
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Posts: 319
Default Too many GPS puck antennas

On Saturday, January 11, 2020 at 12:31:14 PM UTC-8, JS wrote:
On Saturday, January 11, 2020 at 9:49:32 AM UTC-8, wrote:
What brand/model 12v GPS antenna is being used, reasons?

R


Linx Antenna Factor
ANT-GPS-SH-SMA (with SMA connector)
ANT-GPS-SH-MCX (with MCX connector)
ANT-GPS-SH-MMX (with MMCX connector)

Each GPS engine provides phantom power, and the voltage from each is added. If you use a standard puck the voltage from 2 or 3 engines will be too high.
The Linx has higher gain with higher phantom voltage (up to 12v).
System Gain: 28dB (typ. includes 4dB
cable & filter loss)
Noise Figu 1.8dB @ fo, 2dB max.
Input Voltage: +2.5VDC to +12VDC
Jim


Dear customer,

Linx Technologies is announcing the end-of-life of the ANT-GPS-SH-SMA, ANT-GPS-SH-MCX and ANT-GPS-SH-MMX Series of antennas, and the launch of the SH2 Series GPS antennas.Key components critical to the design of the SH Series antennas have been discontinued by the IC manufacturer.

SH2 Series are DC 5V


Richard
  #14  
Old January 12th 20, 12:56 AM posted to rec.aviation.soaring
Eric Greenwell[_4_]
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Posts: 1,939
Default Too many GPS puck antennas

JS wrote on 1/11/2020 2:03 PM:
On Saturday, January 11, 2020 at 12:34:19 PM UTC-8, Eric Greenwell wrote:
wrote on 1/11/2020 9:49 AM:
What brand/model 12v GPS antenna is being used, reasons?


The ones supplied with Powerflarm core, Cambridge 302, and ClearNav. Later, I
removed the 302 and put in a Butterfly vario, using it's supplied GPS antenna.
Everything seemed to work the same.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1


The antennas included with glider instruments aren't good to 12v. Give them a try at 9-12v and report how long they last.


I just connect them to the instrument that was in the same box. I was puzzled
about the assumption they were 12 volt antennas; don't have a clue, either.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
  #15  
Old January 12th 20, 01:48 AM
Delta8 Delta8 is offline
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First recorded activity by AviationBanter: Apr 2019
Location: Pa.
Posts: 56
Default

Quote:
Originally Posted by View Post
On Friday, January 10, 2020 at 9:22:22 PM UTC-5, Charles Longley wrote:
I just started pimping out my ASW20. I am putting in a LXNAV S100, FLARM and an ADS-B Trig transponder. Thant’s three puck antennas and I haven’t even figured out where to put the FLARM antennas yet! Does anyone have a good solution?


Too many puck GPS antennas too close together will lead to interference and poor function.
I remember reading somewhere that these puck antennas must be 30 inches apart to help reduce the possibility of such interference.
What about compass interference with all those magnets and metal ?
I have one that I moved around the compass but seemed to not affect it .
  #17  
Old January 12th 20, 03:36 AM posted to rec.aviation.soaring
Richard Pfiffner[_2_]
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Posts: 319
Default Too many GPS puck antennas




Eric,

They are not 12V antennas. Most if not all state of the art flight computer GPSs feed the antennas with 3v to 5v.

Richard
  #18  
Old January 12th 20, 03:59 AM posted to rec.aviation.soaring
Charles Longley
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Posts: 290
Default Too many GPS puck antennas

Pfft compass what’s that? Look out the canopy.
  #19  
Old January 12th 20, 04:58 AM posted to rec.aviation.soaring
Eric Greenwell[_4_]
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Posts: 1,939
Default Too many GPS puck antennas

Charles Longley wrote on 1/11/2020 6:59 PM:
Pfft compass what’s that? Look out the canopy.

Not a good option in Kansas! You are spoiled by flying where there are mountains
to guide you. In Kansas, look at the GPS track when you want to know direction. Or
pull out your iPhone, and use the compass app.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
  #20  
Old January 12th 20, 10:31 AM posted to rec.aviation.soaring
Richard Frawley
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Posts: 14
Default Too many GPS puck antennas

You can feed the S100 with flarm data which has GPS data
 




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