Ampex 4690037-01 - Reproduce Alignment Tape
Format: full track mono, ¼", 3¾ ips; 7" reel
Release: c. 1970s (USA)

Professional NAB reproduce alignment tape for 3¾ ips machines, labeled 90 µs and 3180 µs equalization. Designed for full track mono decks used in broadcast, duplication, and consumer hi-fi applications running at the slower speed standard.

A useful calibration reference for maintaining proper playback level and EQ accuracy on 3¾ ips full track machines.