Wherever did you find them at that price ? Mine cost nearly 100 pounds,
and that was from the TAPR special deal on GPS25s.
Not all handhelds have a 1pps output - before getting the GPS25 I
searched the entire PCB on the Magellan Trailblazer, scope probing just
about every pin on the ICs and found absolutely nothing resembling a
stable 1 PPS clock. The data bursts from its NMEA output were too
uncertain in their timing to even think of using as standard.
Andy G4JNT
everyone. It is the 1 PPS from almost any second hand OEM level GPS
receiver. I have one here that cost $20 US$, about the size
of what we once>
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