Here are the characteristics you are looking for .
Analog , good condition . Dont need to be freshly calibrated .
The bandwidth doesnt matter , 100 mhz is finbe .
Since you are gonna be working on a 3 phase system I would consider a 4 channel scope . IMO just get a 4 channel .
the tektronix 2000 series are a famous for their durability and ease to calibrate , even I can calibrate mine . Thats why they are still expensive and why there is competition on every decent item . Especially with this hot new steorn thing , OU is hot again .
Didital storage is useless , unless you are really geeky and haver a distant lab or something .
Electrojolt has the perfect scope for the job , not too many bels and whilstles and all you need for the price , check his youtube electrojoltman for the model number , I think he got his for like 240$ .
