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Jan 5, 1. May 3, Orangevale, CA If anybody is interested, I dug out the Ampeg serial dating code for Ampeg and Crate gear manufactured during the Saint Louis Music years. Jun 16, 2. Does anybody have anything new to add to this old thread? Jerrold Tiers or??? Jun 16, 3. Dec 20, Phoenix. The book contains, in addition to an in-depth history of the Ampeg company, more useful technical information on the variations in Ampeg amplifiers, including color depictions of the various cabinet coverings and grill cloths.
for information on ordering this book directly from the authors.
Dating Ampeg Amplifiers Ampegs can be divided into six distinct groups for dating purposes: pre, to mid, early tototoand post Each group uses a unique serialization scheme that can be used to assist in dating the amps, but in many cases, it is the features and characteristics of the amps that determine the year of manufacture. Electronic Industries Association EIA codes can also be very useful for giving clues as to an amp's age. These codes can be found on speakers, transformers, pots, capacitors, and multi-section electrolytic "can" caps.
Of course, these codes are only applicable to original components, not replacement parts. Therefore, do not poke around in your old Ampeg if you are unfamiliar with amplifier electronics or their operation.
A brief summary of the EIA system follows. Shortly after World War II, American electronic component manufacturers began to stamp a semi-standardized code into the Ampeg svt cabinet serial number dating they produced. The code contained information regarding the manufacture and date of production. These codes have been used on components including potentiometers potstransformers, capacitors, tubes, and speakers. The code usually consists of 6 or 7 digits such as where the first two or three digits is the EIA code for the manufacturer denotes CTSthe fourth digit and sometimes fifth digit denotes the year in this case it could be66, or 76and the last two digits denote the week of the year.
It is important to note that parts do not always contain EIA codes, especially those parts from the late s and early s. These amps used a serial system that was not used by any Ampegs. Unfortunately, the serial s are of little help for dating one of these pre-Ampeg models and EIA date codes on components were used sporadically during the early post WW-II years. The only date codes that seems to be readily available is found on the speaker magnet located under the bell cover.
The Ampegs made between and did not have serial s and must be dated in the same way as the Michael-Hull models, specifically, by finding the EIA date codes on pots, transformers, multi-section "can" capacitors, and speakers. The Nth unit, however, may not have started with Ampeg may very well have used or as the starting point during slow production periods. Nevertheless, for dating purposes, the serial provides adequate information during this period.
For example, a Duette with serial was made in 7during October 10and was possibly the st amp made that month. A Super Echo Twin with serial was made in 4during April 04 and may have been the th amp made that month Caution is needed for dating amps from,and The serial s from these years were duplicated in,andrespectively. Taking the example Super Echo Twin above, its serial alone could denote April or April A Mercury with serial could be from September or it could be from the second serial system implemented in Luckily, it is very easy to determine which year the first digit denotes.
The key is the model and the cosmetics. For instance, the Super Echo Twin was made inbut not in Likewise, an Ampeg from would not be covered in blue check vinyl whereas an amp from would have this covering. An Ampeg from would be covered in navy random flair vinyl whereas an amp from would be covered in blue check vinyl. Another check for a versus a or later serial i. Therefore, a serial where these two digits are greater than 12 must be from the second serial system - A final Ampeg svt cabinet serial number dating check with EIA dated components should remove any doubt about an made during the - 65 period.
This system overlapped with the serialization scheme for a period of about 6 months. These are also 6-digit s, which appear to have been applied sequentially, but they are not date encoded. Enough information Ampeg svt cabinet serial number dating s, model, date codes has been gathered to prepare the following guide for dating by serial .
Note Ampeg svt cabinet serial number dating the year associated with a range of serial s is very rough and will likely change as more information is gathered for refining the estimates. The EIA date codes of original components should be used to confirm an approximate date of manufacture. Serial Range Year to to to to to through The third serial system was implemented in Not enough information was available to the authors to determine year of manufacture by serial.
An added variable is that during the Magnavox years, Ampeg may have used separate serial systems for each model or for models that shared the same chassis like the VT and V Until such time that enough information is available to date s Ampegs by serialthe features of the amps from this period can be used and compared to the following table.
Feature Years Used Blue control panel graphics - Black control panel graphics with square corners - Black control panel graphics, horizontally split with rounded corners solid state amps - Black control panel graphics, horizontally split with rounded corners tube amps - Distortion control knob - White rocker switches solid state amps - White rocker switches tube amps - Black rocker switches - Metal "a" logo - Plastic "a" logo - - Ampeg svt cabinet serial number dating MTI-era amplifiers cannot be dated by serial.
However, all MTI-era Ampegs were made in the relatively short time period between late and Louis Music era were all made after The amps made since have a digit serial which is encoded for model, country, date, and year.
Jan 28, 4. Mar 30, 5. Dec 4, Seattle. Don't know what the X is but if it's a '92 then it's a US made cab. Apr 28, 6. Apr 28, Winfield, Pa. Apr 28, 7. Is this correct. The 8 would be August and the 65 would be the 65th one made that year? The fourth character is D, which indicates made in the St.
Louis plant. Am I correct? Sure would like some help deciphering this serial if I'm wrong. Thanks, Duffy. Apr 28, 8. Sep 25, Negative on the D That means it was made for the US market. Not country of origin. Apr 28, 9. What about my ideas on the date of mfg? Am I correct on that? No way to tell where made from the serial ? Apr 29, Duffy, She was built in august of 06 correct. This is a law enacted in the late 60's - early 70's. Just a little piece of trivia. PawleeP likes this. Feb 5, Columbus,Ohio. It has the chrome chassisuses 's and has the delay socket so it is a very early SVT.
So I can agree with useing the components to date the thing. Way cool Sedan You have a matching cab for that too? What sort of Condition is it in?
Apr 30, View attachment Really good actually. I recovered everything. May 8, Feb 8, Florence, Alabama. My 5th character is an 8 though, what is up with that? May 9, Nov 14, St Louis. Sep 16, Jul 11, Kansas City. I had a question for any super ampeg scholars out there. My svte has the serial and has a black carpet exterior, silver grill cloth, and one 4ohm input.
Was it made between 85 and 88? It says it's made by slm. Any ideas? Dec 21, Jun 6, Bright, IN. It's hard to believe because it doesn't look more than a year or two old at most.Ampeg svt cabinet serial number dating
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Ampeg Serial Date Code