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===561B=== | ===561B=== | ||
The 561B / RM561B were [[introduced in 1969]]. | The 561B / RM561B were [[introduced in 1969]]. | ||
The | The 561B uses the same [[560-series plug-ins]] used by the 561A. | ||
The 561B models actually provided no performance improvements over the 561A, | |||
with the change being limited to all solid state design, including the HV rectifiers. | with the change being limited to all solid state design, including the HV rectifiers. | ||
While this improves reliability of the mainframe, | While this change improves reliability of the mainframe, | ||
Tektronix never produced fully solid state amplifier or non-sampling timebase plug-ins for the 560 Series. | |||
===561S=== | ===561S=== |