Dating vintage ampeg amps dating sites of sweden
It appears that the serialization system used during this time period is date encoded which makes dating the amplifier rather easy.
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 second serial number system was implemented in January 1965 and used until the end of 1969.These codes have been used on components including potentiometers (pots), transformers, capacitors, tubes, and speakers.The code usually consists of 6 or 7 digits such as 137634 where the first two or three digits is the EIA code for the manufacturer (137 denotes CTS), the fourth digit and sometimes fifth digit denotes the year (in this case it could be 1956, 66, or 76), and the last two digits denote the week of the year.numbers beginning with 0) is that the second and third digits of the number denote the month in the first serial number system.Therefore, a serial number where these two digits are greater than 12 must be from the second serial number system (1965 - 69).
Therefore, do not poke around in your old Ampeg if you are unfamiliar with amplifier electronics or their operation. Shortly after World War II, American electronic component manufacturers began to stamp a semi-standardized code into the parts they produced.