[OZAPRS] TinyTrack3 Plus GPS Combo- Problems

[David and Justine Olsen]

The TT3Plus was supplied as a GPS combo, that is it is supposed to  
work with the supplied GPS,  a Byonics GPS 2
The TT3 Plus is supposed to supply 5V via pin 4 of the serial  
connector (DB9) which is enough to supply the GPS 2 according to  
Byonics.

David





On 13 Apr 2009, at 20:29, Michael Carey wrote:

> What type of GPS are you using, how are you powering both the GPS  
> and the TT3. Are you supplying 12V through the radio connector and  
> using the TT3 onboard 5V regulator to supply 5V to the GPS? Did you  
> get the TT3+ with the bigger 5V regulator? The 78L05 reg in a  
> normal TT3 isn't up to powering a lot of 5V GPS receivers as well  
> as the TT3 circuit.
>
> Michael.
> VK5ZEA
>
> David and Justine Olsen wrote:
>> I purchased a fully built (not kit) TT3 Plus with GPS. It arrived  
>> today, and I expected to be able to configure it an be on the air  
>> in no time.
>>
>> Apart from the fact it came with the wrong radio to TT3 cable,  
>> there seems to be other issues.
>>
>> I configured the TT3 using the software provided, then attached to  
>> power and GPS (couldn't attach to radio as the wrong cable was  
>> supplied).
>>
>> The lights flash as they should, but the GPS Valid (green light)  
>> does not come on. I left the GPS powered for hours, but still  
>> nothing. I changed the configuration to allow TTL send, and the  
>> lights flashed in the correct fashion, but still no solid green  
>> light. The J7 jumper is configured for 5Volts which is correct for  
>> the GPS I am using.
>>
>> I do not have a laptop so I can't run GPS  terminal software in a  
>> place where the GPS can see the sky but being new, surely it  
>> works :-).
>>
>> Any ideas???
>>
>> David VK4MDX
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>> Ozaprs at aprs.net.au
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>>
>
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