Beyond the 49 second thingy, for start and stops of transmissions in JT65, why is JT65 so time dependent? I know it is, as I can see shifts in the waterfall when my time is reset in the middle of a receive cycle.
Unless you're time sync is way off, I would think you'd not be able to see a shift? How often does your time get synced and can you tell what the average shift might be? Just curious.
I use 'TIMESYNC' application in Windows XP and have a 5 minute time sync cycle. I haven't noticed any shifting in the waterfall with this setup?