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551: Difference between revisions
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The external power supplies of the 555 and 551 are not interchangeable. | The external power supplies of the 555 and 551 are not interchangeable. | ||
The vertical amplifiers of the [[545|545A]], 551, and 555 are identical. | The vertical amplifiers of the [[545|545A]], 551, and 555 are identical. | ||
A factory modification, MOD 108A, was available for increasing the CRT acceleration voltage. This improved trace visibility at high sweep rates. | A factory modification, MOD 108A, was available for increasing the CRT acceleration voltage. This improved trace visibility at high sweep rates. | ||