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. This improved trace visibility at high sweep rates.
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.

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