having a hard time dating my silverface twin

Discussion in 'Amps and Cabs' started by AaWendt, Apr 11, 2015.

  1. AaWendt

    AaWendt Member

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    i have a silverface twin loaded w/ Utahs. the printing on the output transformer is 022889, and -606-1-21-. there is no discerning info on the tube chart. there is a round sticker on the cigar box shaped metal casing behind the tubes that protects lotsa caps that says 1-11-72. also, the printing on the front says "twin reverb" in one row, dissimilar to other twins i've seen which has the word "twin" ABOVE the word "reverb." i'm obviously inclined to think it's a '72, but because fender is such a mess with dating things, i figured i'd ask.
     
  2. zenas

    zenas Member

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    Google "dating twins" you'll find some interesting sites and forget all about that amp.

    Or Google "dating Fender amps".
     
  3. AaWendt

    AaWendt Member

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    hahahaha. googled dating twins with safe search off.....



    ...what amp?
     
  4. 70s Rocker

    70s Rocker Overdriven Member Silver Supporting Member

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    Try buying flowers?



    YEAR MONTH
    1951 A January A
    1952 B February B
    1953 C March C
    1954 D April D
    1955 E May E
    1956 F June F
    1957 G July G
    1958 H August H
    1959 I September I
    1960 J October J
    1961 K November K
    1962 L December L
    1963 M
    1964 N
    1965 O
    1966 P
    1967 Q
    1968 R
    1969 S

    DATING FENDER AMPLIFIERS (INCLUDING SILVERFACE AND
    BLACKFACE AMPS) USING TRANSFORMER CODES
    In general, Fender amps that don't have rubber-stamped tube sticker date codes have EIA numbers on their transformers that might enable determination of the production date. These numbers always begin with "EIA 606," and are followed by three or four digits in various combinations.
    If three digits are present, the first digit refers to the year (i.e., a "7" would mean 1967). If four digits are present, the first two digits refer to the year (i.e., a "66" would mean 1966). The last two digits refer to the week of the year (i.e., a "26" would mean the 26th week or, roughly, June). For example, EIA 606-4-21 would denote the 21st week of 1964. It is also advisable to add about 6 months to the date to allow fo time these parts may have spent in inventory storage.
    REFERENCE MATERIALS FOR DATING FENDER AMPLIFIERS
     
  5. saltydogg

    saltydogg Rock & Roll Enthusiast Gold Supporting Member

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    Ask Hef:

    [​IMG]


    Sorry....
     
  6. guller

    guller Member

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    Jun 23, 2006
    Sounds like a 71 or 72 to me. 606 is the transformer code - Schumacher transformers. 1 is the year code - either 61, 71, or 81. Silverface = 1971 transformer.

    Fender used whatever parts they had on hand at the time of building. So a 72 could easily have parts from 1971.

    If you pull out the chassis there should be a date stamp on the inside, I've found that that tells you the most.
     
  7. Bluesful

    Bluesful Supporting Member

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    That's true, but to confuse the actual year of the amp replacement transformers could be from a different 'era'.

    For example I have '67 Vibrolux Reverb with a OEM power transformer from '73 with a 240V tap (as I'm in Australia).

    But I do agree the OP's output transformer is more than likely a '71.
     
  8. AaWendt

    AaWendt Member

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    Thanks all. W/ the sticker that I mentioned w a date of 1-11-72 and the info that the transformer is likely a 71, I'm gonna go w a '72 when I list it to sell. Thanks!
     

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