Gaffrig Gps speedo NG

[z.zuperboat]

Finally installed the speedo last week. Bought it used here on oso. Was supposedly tested from gaffrig. Well when I power it on it goes up to 80 then say 50 then 30 then 0. Is that normal. Also doesnt work. Im using the external signal out from my existing GPS for an antenna. That mite be the problem. Any thoughts.

[clpbs]

check that the out put on the gps is set right. It can be changed for different devices.

[z.zuperboat]

Very interesting. I guess that would require a book and some reading. I think I can check into that. THANKS

[ZXXX Donzi]

Finally installed the speedo last week. Bought it used here on oso. Was supposedly tested from gaffrig. Well when I power it on it goes up to 80 then say 50 then 30 then 0. Is that normal. Also doesnt work. Im using the external signal out from my existing GPS for an antenna. That mite be the problem. Any thoughts.

I am having a similar issue with mine. I may have to buy the $220 antenna