T581

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.

The vertical deflection plates are distributed. The horizontal deflection plates are a conventional pair of plates.

Vertical deflection factor is 4.6 to 5.6 V/cm. Horizontal deflection factor is 18 to 21 V/cm.

10 kV total accelerating voltage is typical for the T581.

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  distributed deflection plate details