Help Me Date A Princeton

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by JBarlow, Aug 29, 2006.

  1. JBarlow

    JBarlow Member

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    Hey there. I'm trying to buy an amp from a guy who doesn't know much about the history of his drip edge Princeton reverb. I'm having a hard time figuring out a couple of the transformer codes to try and make sure they are close to original. They are as emailed to me:

    022913 -EIA606--436
    F022921 E1A606--412

    Thanks for your help!

    --Jason
     
  2. Boogie92801

    Boogie92801 Member

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    Drip edge should be a 68 or 69.
     
  3. JBarlow

    JBarlow Member

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    I know cosmetically what years they should be. I'm just not too sure about the transformers. Thanks!

    --Jason
     
  4. Boogie92801

    Boogie92801 Member

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    Date Code: Wide panel, narrow panel, brown, blonde, and black face amps have a date code hand-stamped on the tube chart. This code is made up of two letters. The first letter translates to the year and the second to the month. The reissue amps also made use of this code Date Codes Letter Code Vintage Year Reissue Year Month A - 1990 January B - 1991 February C 1953 1992 March D 1954 1993 April E 1955 1994 May F 1956 1995 June G 1957 1996 July H 1958 1997 August I 1959 1998 September J 1960 1999 October K 1961 - November L 1962 - December M 1963 - - N 1964 - - O 1965 - - P 1966 - - Q 1967 - - Example: FG=July 1956, QA=January 1967, and a reissue CG=July 1992

    EIA Source-Date Codes: Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stampted with a date code indicating who manufactured them and when. The code follows the format: XXXYY ZZ where:
    XXX = a two or three (possibly four on newer amps) digit number indicating the manufacturer. (see chart below)
    YY = is a one or two digit code indicating the year. If it's a one digit year you need to determine the correct decade of the amp some other way.
    ZZ = a number from 1 - 52 indicating the week of the year.
    Remember, your amp is newer than the newest component. So if you find pots from late 68 and transformers from early 69 you can be pretty sure your amp is a 1969. Common Fender Source Codes Code Manufacturer Part(s) 67 Eminence Speakers 73 J.B. Lansing (JBL) Speakers 137 CTS Potentiometers, Speakers 220 Jensen Speakers 235 Mallory Capacitors 285 Rola Speakers 304 Stackpole Potentiometers 328 Utah Speakers 391 Altec-Lansing Speakers 433 Cleveland Speakers 465 Oxford Speakers 606 Schumacher Transformers, Chokes 649 Electro Voice (EV) Speakers 830 Triad Transformers, Chokes 1098 Pyle Speakers
     
  5. Boogie92801

    Boogie92801 Member

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  6. mbratch

    mbratch Member

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    Those are either '64 or '74 transformers (a more experienced Fender vintager on the board here could tell you). In either case, probably replacements. I don't think I've ever seen a stock BF with transformers that were 4 years or so older than the amp.

    As far as the rest of the chassis, Boogie gave the clues. The ink stamped number on the inside of the chassis is a good one.
     

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