There has been a comment on another group that cellphones can cause random
slewing on certain go-to scopes.

I have a DS-2090 made in 2008, the roller bearing later model, which slews
sometimes with random errors in azimuth. The errors can be from about 5 to about
15 degrees beyond the proper stopping point.

When the random errors occur, if I manually reset the azimuth to center the
target in question (by moving the scope against the clutch, not using the
handset buttons) the scope resumes normal operation, including accurate
subsequent slews, until the next error which may be 5 minutes or an hour later.

I always have a cellphone in my pocket when I observe, a habit I picked up from
using older ETX and DS models, to set the time accurately.

Has someone else seen this problem and fixed it by leaving the cellphone in the
house?

My older DS-2102 does not exhibit this behavior, it is the teflon bearing model.

Thanks,

Frank