[Gta04-owner] Antwort: Re: MMCX connector

Sven Dyroff S.Dyroff at phytec.de
Tue Feb 19 11:07:47 CET 2013


Hello Nikolaus,

>> one more suggestion for improvements that should be made on the 
GTA04A5:
>> Please make the solder contacts of the MMCX connector more stable! 
Currently
>> I can confirm that it's indeed very easy to break them...   :-( 
>
> If you know a manufacturer of such a connector that has the right height 
above the
> PCB and is surface mountable... The one we use was the best and only one 
we
> could get hands on.

perhaps a stupid question: Isn't it possible to simply make bigger pads on 
the board and spend more soldering paste on them? The used MMCX connector 
itself seems completely ok for me, but its connections to the board are 
definitely too weak.

Best regards
   Sven
 




Von:    "Dr. H. Nikolaus Schaller" <hns at goldelico.com>
An:     List for communicating with real GTA04 owners 
<gta04-owner at goldelico.com>
Datum:  19.02.2013 10:59
Betreff:        Re: [Gta04-owner] MMCX connector
Gesendet von:   gta04-owner-bounces at goldelico.com




Am 19.02.2013 um 10:47 schrieb Sven Dyroff:

Hello Nikolaus, 

one more suggestion for improvements that should be made on the GTA04A5: 
Please make the solder contacts of the MMCX connector more stable! 
Currently I can confirm that it's indeed very easy to break them...   :-( 

If you know a manufacturer of such a connector that has the right height 
above the PCB and is surface mountable... The one we use was the best and 
only one we could get hands on.


Am I right that it's hardly possible to reconnect an MMCX socket that has 
lost its connections to the board? 

Well, it is possible. But needs a good microscope, a very thin wire, a 
very calm hand and a lot of patience...


Another question on external antenna: 

I see that "cat /sys/class/regulator/regulator.8/microvolts" shows 2.8V 
but I cannot find gpio144 and gpio145 any more within 
"/sys/devices/virtual/gpio". It's also not possible to get them within 
"/sys/class/gpio". Where have these both gpios been moved to? 

I was also wondering recently. I think they are missing in the 3.x 
kernels.

Nikolaus
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