[LW] [LW11] connecting an A70D chartplotter to a NASA GPS repeater

[adamcovell]

I have NASA GPS repeater connected to my chart plotter - A70D. The repeater gives "no GPS signal". It is only when I put a course into the plotter that the repeater then comes up with a fix and works as expected, giving SOG etc.

This is a pain as every time I start up the instruments when racing I have to go down below to set a course on the plotter. The plotter is also connected to the same port to the VHF/DSC and gives a fix on startup there no problem.

I have rewired the NMEA junction box but still the same. I am using port 2 NMEA 4800 out of the plotter and have connected as per the NASA instructions with red to power, blue to NMEA +out and screen to NMEA -ve out.

I have been told this may be because NASA uses the old single wire and ground whereas raymarine use the newer NMEA +ve and -ve ? And it has been suggested I use a NMEA protocol bridge like this -

https://www.quark-elec.com/product/qk-as..._iCewgJChM

Will this work????? (and if so how to wire it ie NASA blue to yellow RX?). If not is there another solution Thanks