Unless I missed it no one has mentioned " Karen's Time Sync " From the time JT44 was introducedĀ  I used Dimension 4 , as computers became faster and Op systems changed . D4 started giving me intermittent problems ! Two weeks ago I started usingĀ  Karen's Time Sync with no plans to change .

Ed N5DG


On 9/13/2017 2:19 PM, Josh wrote:
Yikes! +/-30 secs and you might not even be transmitting when the other station 
is listening.

It's pretty well accepted that <1s is minimum accuracy for good performance. On 
EME you're looking for dT around 2.5 secs to help identify valid signals. If 
you're not within 0.3s, I'd be looking for a better solution.

Dimension 4 worked great on my XP machine. When I upgraded last year to a much 
faster Win 7, per recommendation from EME guru W7GJ's site, I installed 
Meinberg which has been trouble free. Since K6QXY's computer for JT isn't 
internet connected, I got a USB puck GPS receiver and NMEATime from 
VisualGPS.net for Bob, and it's been an excellent solution. Software plus 
receiver around $50. I expected we'd have to put the puck outdoors, but it 
locked just fine laying on the computer desk.

That's been my experience!

73,
Josh W6XU

Sent from my mobile device

For what it's worth, plus or minus 30 seconds isn't all that big a deal.


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