Ampeg svt serial number dating back book dating guest

The serial numbers are 6 digits in length with the following pattern: YMMNNN, where Y denotes the year, MM the month, and NNN the Nth unit produced that month.

The Nth unit, however, may not have started with 001.

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Dating Ampeg Amplifiers--------------------------------------------------------------------------------Ampegs can be divided into six distinct groups for dating purposes: pre-1953, 1953 to mid-1965, early 1965 to 1969, 1969 to 1979, 1981 to 1984, and post-1984.

The # unit, however, may not have started with 001.

During the year the tilt back rod was discontinued.Other 1965 Portaflex characteristics: White silkscreened graphics, two channels with guitar and bass input jacks on channel 1, black stove type knobs, CTS and Centralab potentiometers, three metal switches, two large black transformers, black tube cage protecting the tubes and capacitors, light up plexiglass logo, fuse, two prong power cord, schematic, handles, 4 pin XLR speaker cable and jack, 4 chrome lid latches, chrome script logo, Blue Check vinyl covering, silver grille cloth, 15 inch speaker, matching dolly with wheels, protective vinyl amp cover, literature.The first serial number system are 6 digits in length with the following pattern: YMMNNN, where Y denotes the year, MM the month, and NNN the # unit produced that month.The code contained information regarding the manufacture and date of production.These codes have been used on components including potentiometers (pots), transformers, capacitors, tubes, and speakers.