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This is a Revox B-77MK2 rack mount 2 track 1/4 inch reel to reel recorder with optional slide sync card.

It has been calibrated and aligned with an MRL test tape and the bias set for Ampex 632 tape. It plays and records

good on both 3 3/4 and 7 1/2 ips. The tractor belt for the tape counter is missing, but can be found 

on ebay and is easy to install. The splice block is missing also, but other than that there are no issues.

  

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