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After serial number 2585, the back termination of the final distributed amplifier output was made adjustable. | After serial number 2585, the back termination of the final distributed amplifier output was made adjustable. | ||
The manual says this (field-installable) modification is "required for proper operation of plug-ins with numbers above | The manual says this (field-installable) modification (040-275) is "required for proper operation of plug-ins | ||
[[81|Type 81]]". | with numbers above [[81|Type 81]]". | ||
===Power Supply=== | ===Power Supply=== |