Chris - I was not aware that you were having issues with the TAPR Experimenters Kit. I am finishing a DIY GPS kit build from "assorted parts sources" for Jim Pruitt. Jim missed purchasing the TAPR kit in May 2017 (sold out before he ordered). -- I acquired ($) a Synergy SynPaQ/E carrier board with a dead M12+ receiver. Since I happen to have a couple spare Oncore M12+ boards (inventory, working), it was just a matter of swapping those receiver boards. -- You need to be careful in selection of the GPS antenna, since there are a wide variety on the surplus market: Passive (no pre-amp); Active with different voltage requirements (12, 5, or 3.3 VDC) from GPS receiver. At the electronics bench, I try to use 5 Volt antennas (or 3.3V that are 5v tolerant) with similar GPS receivers (5V preferred). greg w9gb Sent from iPad Air

Hi, Definitely RX LED on and not TXD. I'll look more into this tomorrow night when back at my bench. Chris > On Jul 4, 2017, at 12:02 PM, Gregory Beat <w9gb@icloud.com> wrote: > > Chris - > > I was not aware that you were having issues with the TAPR Experimenters Kit. > I am finishing a DIY GPS kit build from "assorted parts sources" for Jim Pruitt. > Jim missed purchasing the TAPR kit in May 2017 (sold out before he ordered). > -- > I acquired ($) a Synergy SynPaQ/E carrier board with a dead M12+ receiver. > Since I happen to have a couple spare Oncore M12+ boards (inventory, working), > it was just a matter of swapping those receiver boards. > -- > You need to be careful in selection of the GPS antenna, since there are a wide variety on the surplus market: Passive (no pre-amp); Active with different voltage requirements (12, 5, or 3.3 VDC) from GPS receiver. > At the electronics bench, I try to use 5 Volt antennas (or 3.3V that are 5v tolerant) with similar GPS receivers (5V preferred). > > greg > w9gb > > Sent from iPad Air

I'm using a little 5V Trimble mag mount patch at the bench for testing. Chris > On Jul 4, 2017, at 12:02 PM, Gregory Beat <w9gb@icloud.com> wrote: > > Chris - > > I was not aware that you were having issues with the TAPR Experimenters Kit. > I am finishing a DIY GPS kit build from "assorted parts sources" for Jim Pruitt. > Jim missed purchasing the TAPR kit in May 2017 (sold out before he ordered). > -- > I acquired ($) a Synergy SynPaQ/E carrier board with a dead M12+ receiver. > Since I happen to have a couple spare Oncore M12+ boards (inventory, working), > it was just a matter of swapping those receiver boards. > -- > You need to be careful in selection of the GPS antenna, since there are a wide variety on the surplus market: Passive (no pre-amp); Active with different voltage requirements (12, 5, or 3.3 VDC) from GPS receiver. > At the electronics bench, I try to use 5 Volt antennas (or 3.3V that are 5v tolerant) with similar GPS receivers (5V preferred). > > greg > w9gb > > Sent from iPad Air