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The T581 is a CRT manufactured by Tektronix and used in the [[581]] and [[585]]. | The '''T581'' is a CRT manufactured by Tektronix and used in the [[581]] and [[585]]. | ||
A key designer was [[John Kobbe]]. | |||
The T581 came with P31 [[phosphor]] standard, but was also available with P1, P2, P7, and P11. | |||
Usable viewing area is 4 cm by 10 cm. | Usable viewing area is 4 cm by 10 cm. | ||