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I Installed a new battery, then completelyreworked a 54540A and disassembled it for parts.
This board passed self-testand then calibration. The 54512-63402 attenuators have been removed. Your attenuators may be good. If you areworking on a 54540A and need attenuators contact me.
The Fourgood 1NB7-8353 A/D ‘s are tested come with the board.
The battery is new.
I have allthe other parts (power receptacle, display board, power supply, floppy even chassis) if you need anycontact me
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