general GPS advice required

[comwarrior]

The preamp has been tried powered and unpowered... according to the datasheet for the antenna's they require 3.3V or 5V...

The 5V supply is from a 5V regulator LM7805CV and that is fed from a 12V 16AH lead acid battery...
The unit is currently pulling ~250mA including charging a 3.6V LiPOL @ ~10mA (SRAM and RTC battery backup)

Comms to and from the unit seems ok.

The last attachment is a PDF datasheet for the antenna.

I've left the unit on over night ~ 8 hours but the manual says 15 mins...

I did notice the receiver is TU00 and the antenna's are for TU30 which i'll be surprised if it's incompatible...
I'm going to try the other board (i baught two identical) just to see if it's a board fault...
If that fails i'm going to see if i can make a passive antenna...

[Regenpak]

FWIW- I have the same type of unit. I hooked it up to an active antenna and while it powered the patch antenna it only output the GPGGA with all zeroes. It did see satellites but it refused to acquire a fix. Then I swapped the patch antenna for another one liberated from a USB GPS receiver (Navtech or something, lost the enclosure) and within 15 minutes, as promised, I had a fix with proper GPGGA and GPVTG data.

You may want to check the decrease in drawn current, these patch antennas need about 10 mA at 5 volts to work. Just unplug the MCX connector.

Good luck!