Community update: GSM firmware, 850MHz experiment, GTA02 progress

[Michael Shiloh]

Yes, but not the recalibration or the firmware changes.

One step at a time - let's see if these units work, and if so, we'll 
look into if there is any way to tackle the other issues.

Michael

Cliff Brake wrote:
> I would also be very interested in re-work instructions for modifying
> a GTA01 to support 850MHz as many of us are capable doing circuit
> modifications.
> 
> Thanks,
> Cliff
> 
> On Dec 10, 2007 9:32 AM, Mark <markitect at gmail.com> wrote:
>> In regards to the 850MHz Issue:
>> It seems that very little effort was required to switch a phone board
>> to 850 for testing.  So my question is what exactly is involved.  Was
>> it simply switching which pin is attached to the antenna?  If it is a
>> relatively simple circuit change and involving only a top (or bottom)
>> layer trace, is it possible to tell us what connections to change to
>> convert an existing unit to 850MHz.  Obviously only  for the very
>> experienced people.  If there is different capacitor, etc required to
>> match the frequency it might be less doable, but details would be
>> nice. once the design has been confirmed.  On a side note this is
>> excellent news that the 850 variant may not be far behind GTA02.
>>
>> Mark
>>
>> Mark
>>
>>
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> 
> 
>