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221: Difference between revisions
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that drives the CRT plates is two opamps made from discrete transistors. One | that drives the CRT plates is two opamps made from discrete transistors. One | ||
drives the top deflection plate and the other drives the bottom plate. | drives the top deflection plate and the other drives the bottom plate. | ||
The power supply in 221 uses the [[120-0876-00]] transformer. | |||
MOD 290A is found on a version made for IBM, which adds a Single Sweep function, and a "Property of IBM" engraving. | MOD 290A is found on a version made for IBM, which adds a Single Sweep function, and a "Property of IBM" engraving. | ||