I'm having issues with my FT-847 controlling Doppler correctly on linear transponders. I've been using SatPC32, but I'm finding the built-in satellite tracking option isn't properly compensating for both uplink and downlink frequency shifts during a pass. The tracking option in a radio cannot correctly compensate for Doppler, this is one reason why many QSOs drift gently across the linear transponder's available bandwidth. Has anyone found a reliable method for either manual tuning or better software control?

Don't use the FT-847's built-in tracking feature for linear transponders. Do not use the satellite tracking built into your radio - let Ham Radio Deluxe do the work for you (for example on the FT-847 this is the Tracking option). I'd recommend switching to Ham Radio Deluxe or another modern tracking program that can handle proper CAT control.

I've had good luck manually adjusting by following the "One True Rule" — tune both frequencies, with priority on the higher frequency band. If you can't do CAT, adjust the higher of the two frequencies used. Takes some practice but works well once you get the hang of it.

For what it's worth, I find that I tune off to the end of the passband, give a quick test transmission while I talk myself on to the correct frequency, and that correction is good for the pass, and probably all the passes that day. SATPC32 and Ham Radio Deluxe both have ways to do this. The key is making that initial adjustment at the start of each operating session.