[Gta04-owner] GPS fix?

[Neil Jerram]

On 22.11.2011 08:07, Dr. H. Nikolaus Schaller wrote:

> A first estimate means that the traces must be cut. Or the chip must
> be
> removed, two pins must be bent upwards, and the chip resoldered.
>
> Then a 2mm and a 5mm long tiny wire must be soldered. IMHO quite
> difficile if you don't have a stereo microscope.

I wonder if there could be a simpler fix, if one assumes that one will 
never want to use an external antenna?

(Even though I won my ebay auction, and now have an external antenna 
ready to try out, I don't really want to use one as part of my normal 
Phoenux usage, if we can get GPS working without it.)

Even better if the fix could be a reversible one - so that I could try 
it and then reverse it if not successful.

For example - looking at the GPS schematic in the GTA04 manual - could 
it perhaps work to short the P-INT power line (which goes through L1201) 
and the U1201 control line (into pin 4)?  Then, so long as nothing is 
drawing current at P-EXT, the internal antenna would be powered, and 
that would also switch U1201 to the 'internal' setting.

Please interpret this with a very large bucket of salt, because I don't 
really know what I'm talking about here.  For example, the 3V antenna 
power voltage might not be the correct voltage for U1201, and that 
voltage might have terrible effects on the circuitry going back towards 
the current detector.  But I couldn't help wondering (and finding this 
interesting)...

Regards,
       Neil