[RTTY] FT1000D tuning speed problem/question

[Van K7VS]

I have two FT-1000D's and during the recent rtty contest discovered the 
newer unit does not tune at same speed as the older unit making tuning 170 
cycle shift signals difficultat best.  The older 90's model, seems to have a 
slow tune rate about 2.5 khz per revolution of the knob and a fast rate of 
about 10 khz per revolution of the knob depending on how fast you turn the 
knob.  The newer model 2000+ purchase date has only ONE tuning rate which is 
10 khz per full rotation of the tuning knob which makes tuning 170 cycle 
shift signals very difficult.  Did Yaesu change the opto-coupler system on 
their ft1000's somewhere along the line or do I have a problem with my unit?

Not getting much from Yaesu technical support and most of their current 
employees have been recently hired away by the city of Los Angeles!!  I 
can't reach anyone their with any solid background in the ft1000 series to 
answer my question.

Van, K7VS (wa7fab)