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and was superseded in [[introduced_in_1959|1959]] by the 541A, | and was superseded in [[introduced_in_1959|1959]] by the 541A, | ||
which has more convenient controls. | which has more convenient controls. | ||
For example, the 541 required the operator to set two rotary switches to get | |||
the desired sweep time/div . | |||
The 541A replaced the two-switch design with a many-position rotary switch. | |||
This was also the case with the calibrator amplitude, which used two switches on the 541 | |||
and one switch on the 541A. | |||
The 541's CRT is part number [[154-098]], also known as the T54. | The 541's CRT is part number [[154-098]], also known as the T54. |