This is a rare, very early-production OD-1 featuring the Raytheon 3403 quad op-amp!!
Early OD-1 models featured a quad op-amp (a module containing four op-amps). While the RC3403ADB was used in the very earliest models and the NEC μPC4741C was used in units from lot #8400 to #8800, this unit features the former.The LED indicator is dedicated solely to the battery checker, differing from the specifications of the current BOSS Effector.Units equipped with the RC3403ADB are characterized by a somewhat tight low end, extended highs, and a bright, crunchy sound. This is a rare piece that allows you to experience the original sound of the legendary OD-1!! The serial number of this unit is #6600, and it is believed to have been manufactured in January 1978.
PCB: 052-281? (probably B)
OP-IC: RC3403ADB (#RAYP7733)
External spring-loaded transparent switch
LED: Battery checker type
ACA specification
MADE IN JAPAN
*Internal insulating foam missing; rubber bushings on coin screws replaced
Year: 1978
Accessories: None
Contact: Sano
*The warranty periodis one month from the date of purchase.
Click here for our column "The Beginning of a Legend: A Thorough Analysis of the Charm of the 'BOSS OD-1 "Silver Screw" Era" → https://tcgakki.com/pages/magazines-boss-od1
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