Q- does anyone know what size emitters i should use to water raspberries?
A- Try this link for drip questions.
http://www.dripsupply.com/A- If you have a sandy soil, a drip tape of 12 mil or more wall thickness can be used with emitters of .36gph spaced at 16-18 inches will work. In heavier loam soils, you may decrease the emitter flow rate to .23 gph if desired.
If you use a heavy wall tubing (Netafim Ram for example) use emitter spacing of 24-30 inches with an emitter flow rate of .5gph or less.
I am assuming that you have rows of 600 feet or less.
Nate Nourse