user306: Can someone help me understand how the external antenna IPX connector actually stays connected to the Yun? Do I have to "force" it in so it snaps in? I've been somewhat gentle with it in fear I'll break something. However when I get close to getting it in, it just pops back out. 
I've never worked with an IPX connector before, and I'm trying to not break anything. 
EDIT: I may have figured this out. Looks like the socket on the Yun is an IPEX socket, which is female. The cable I have is an IPX/uFL/u.FL connector, which also appears to be female. 
It looks like I need to use an MCX cable adapter as found here: http://www.adafruit.com/products/1532 If someone could confirm this for me, that'd be great. 
Here's a picture of the cable I purchased and my Yun. 


user8: Testing with my Yún, it took quite a bit of force to install the connector. I had to use pliers to get extra leverage, but it eventually snapped in place.

user861: I went through this last night.  I got the adapter cable [ .../852] and antenna from Adafruit.
It appeared to be hard to snap into place, but it did go.
It did not improve performance though when testing signal strength with the Example>Bridge>WiFiStatus 
Which leads me to believe that the connector didn't mate -or- I damaged it -or- it isn't the proper connector.
I am thinking the latter is the case.
Still looking for the answer.
Jim
I bought:
1 ea.     RP-SMA to uFL/u.FL/IPX/IPEX RF Adapter Cable     $3.95
http://www.adafruit.com/products/852
1 ea.     2.4GHz Dipole Swivel Antenna with RP-SMA - 5dBi     $8.95
http://www.adafruit.com/products/945

user11: There's a discussion on the Arduino Forum about this:
Mystery component on Yun board?
From what I read it's only for testing purposes.

the connector is a MM8430-2610 (see this). You can plug in a
  MXGS83RK3000/MM126036: once plugged in, the switch connector will turn
  the internal antenna off and use the probe as an external antenna


306: <p>Can someone help me understand how the external antenna IPX connector actually stays connected to the Yun? Do I have to "force" it in so it snaps in? I've been somewhat gentle with it in fear I'll break something. However when I get close to getting it in, it just pops back out. </p>

<p>I've never worked with an IPX connector before, and I'm trying to not break anything. </p>

<p>EDIT: I may have figured this out. Looks like the socket on the Yun is an IPEX socket, which is female. The cable I have is an IPX/uFL/u.FL connector, which also appears to be female. </p>

<p>It looks like I need to use an MCX cable adapter as found here: <a href="http://www.adafruit.com/products/1532" rel="nofollow noreferrer">http://www.adafruit.com/products/1532</a> If someone could confirm this for me, that'd be great. </p>

<p>Here's a picture of the cable I purchased and my Yun. 
<img src="https://i.stack.imgur.com/nadBC.jpg" alt="enter image description here"></p>
 8: <p>Testing with my Yún, it took quite a bit of force to install the connector. I had to use pliers to get extra leverage, but it eventually snapped in place.</p>
 861: <p>I went through this last night.  I got the adapter cable [ .../852] and antenna from Adafruit.
It appeared to be hard to snap into place, but it did go.<br>
<strong>It did not improve performance</strong> though when testing signal strength with the Example>Bridge>WiFiStatus </p>

<p>Which leads me to believe that the connector didn't mate -or- I damaged it -or- it isn't the proper connector.
I am thinking the latter is the case.
Still looking for the answer.</p>

<p>Jim</p>

<p>I bought:
1 ea.     RP-SMA to uFL/u.FL/IPX/IPEX RF Adapter Cable     $3.95
<a href="http://www.adafruit.com/products/852" rel="nofollow">http://www.adafruit.com/products/852</a>
1 ea.     2.4GHz Dipole Swivel Antenna with RP-SMA - 5dBi     $8.95
<a href="http://www.adafruit.com/products/945" rel="nofollow">http://www.adafruit.com/products/945</a></p>
 11: <p>There's a discussion on the Arduino Forum about this:</p>

<p><a href="http://forum.arduino.cc/index.php?topic=188976.0" rel="nofollow">Mystery component on Yun board?</a></p>

<p>From what I read it's only for testing purposes.</p>

<blockquote>
  <p>the connector is a MM8430-2610 (<a href="http://www.murata.com/products/catalog/pdf/o33e.pdf" rel="nofollow">see this</a>). You can plug in a
  MXGS83RK3000/MM126036: once plugged in, the switch connector will turn
  the internal antenna off and use the probe as an external antenna</p>
</blockquote>
