Quote Originally Posted by rnvinc View Post
I think Wayne P is reporting any "Chart Speed" value less than 3 on his units with the 6.740...

Rickie
i dont think your correct in your statement.i think that wayne p tries the 6.740 and notices the jurking at a chart speed of 3 or less then reverts back to older version.i run 6.740 all the time and what im saying is that im getting different results sometimes that i cant explain and bob b is tring to help with different possiblities.ive incountered really good 2d readings and really bad ones as other times.i have experienced the jurking on si while at other times its just fine.you yourself have the zigzag thing going on with your si with the 1197 and some others with 998 and maybe 1198.i have not seen this zigzag on my 998s.it seems really strange to me