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ub4 no gps lock


 

Hi all,

just? got the UB4,

everything is working good except that the GPS is tot receiving anything (of cores no locking).

i tried a dipole antenna, and 3 different GPS active? Ant ( with a 47 uA? chock connected to pin 14 of the GPS to the GPS Ant but its

not getting anyhing.

can someone give me an advice please ?

regards,

daniel

73,

M0HWD


 

Hi Daniel
I would suggest? you run the U4B transmit program first for 30 minutes info in the manual? and then do the hardware test ...?
I would also suggest you put a 50 ohm resistor over the hf antenna pads while testing.
In some cases the hardware test is difficult to lock and it is aided by using a bit of tinfoil under a piece of paper? with the U4B on top of the paper so the gps antenna could work more effectively inside the house.. just use a simple dipole antenna for the gps with legs about 47mm and in a vee shape.
Dave VE3KCL


 

Dear Dave,

thank you very much for your reply,

it works !
?
i did what you said? and the magic happened.?

The only issue? left, is? although the GPS locks? when i run? the program? and? transmit on time etc,? ?The hardware test? will not work? and when i do? "q + r"? there is? nothing? there .

running? the? program? again? -? it locks? again.? (even? with a dipole? near? the window.? ?(i just? disconnected from the? main? computer and? connected? it? to? a laptop? which? give? probably? less noise? to? the? GPS.

probably? like you? said? the hardware test? need more? "power"? ?from? the satellites.

i will need to take it? outside to check..

In the mean time? let? me? thank? you? for? all you? are doing? ?(and? Hans ),? on? behalf? of? ?all of? us.?

Thank you Dave.

73,

Daniel? ?M0HWD