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551: Difference between revisions
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It is Tektronix part number [[012-032]]. | It is Tektronix part number [[012-032]]. | ||
A factory modification, MOD 108A, was available for increasing the CRT acceleration voltage from 10 kV to 12 kV. | A factory modification, MOD 108A, was available for increasing the CRT acceleration voltage from 10 kV to 12 kV. | ||
This improved trace visibility at high sweep rates. | |||
However, it reduced the deflection sensitivity. | |||
With MOD 108A, each division on the screen is 0.85 cm. | |||
A graticule with 0.85 cm units was supplied. | |||
Early 551 units used [[UHF connector]]s. Many were converted in the field to use [[BNC connector]]s. | Early 551 units used [[UHF connector]]s. Many were converted in the field to use [[BNC connector]]s. | ||