Yes, they do use different voltages than magnetically deflected CRTs. The CR70 has a mode switch specifically for electrostatic 'scope' CRTs. You'd need to compare the datasheet for a 7JP4 to something like a 10BP4 to figure out the exact differences.
Quote:
Originally Posted by pendulum
Yeah, the cr70 really is just good for seeing if the tube is holding vacuum, if it is shorted, and fixing shorts. They almost always test very good. Really the only true test is putting it in a working tv.
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I agree. I've tested 20 or so 7JP4s and all had very good emissions on the CR70, but definitely vary in brightness when actually used.