Dating_Amplifiers 电路图.pdf

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1、DATING CONTEMPORARY DATING CONTEMPORARY DATING CONTEMPORARY DATING CONTEMPORARY FENDER AMPLIFIERSFENDER AMPLIFIERSFENDER AMPLIFIERSFENDER AMPLIFIERS All Fender amplifiers manufactured from 1990 to the present include a date code, printed on the quality assurance (QA) sticker on the back of the amp c

2、hassis. This black-and-silver sticker contains several lines for “sign-offs” on completion of sound and electrical testing. The final line contains a date code of two printed or handwritten letters denoting the amplifiers production date by year (the first letter) and month (the second letter). In t

3、he table below, for example, a “CE” date code indicates a production date of May 1992. YEAR MONTH 1990 A January A 1991 B February B 1992 C March C 1993 D April D 1994 E May E 1995 F June F 1996 G July G 1997 H August H 1998 I September I 1999 J October J 2000 K November K December L RadioFans.CN 收音

4、机爱 好者资料库 DATING 1951DATING 1951DATING 1951DATING 1951- - - -69 69 69 69 AMPLIFIERS USINGAMPLIFIERS USINGAMPLIFIERS USINGAMPLIFIERS USING THE THE THE THE TUBE TUBE TUBE TUBE CHARTCHARTCHARTCHART On the inside of the cabinets of most Fender amps made after 1950 and before 1970, there might be a “tube

5、location” sticker. This sticker is a chart that shows the types of tube types used and the order of their physical location in the amplifier, and may be rubber-stamped with two-letter date codes that denote the year (first letter) and month (second letter) of production. These stamped letters may ap

6、pear in various positions on the chart. In the table below, for example, a “JE” date code indicates a production date of May 1960. 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

7、1961 K November K 1962 L December L 1963 M 1964 N 1965 O 1966 P 1967 Q 1968 R 1969 S RadioFans.CN 收音机爱 好者资料库 DATING DATING DATING DATING AMPLIFIERS AMPLIFIERS AMPLIFIERS AMPLIFIERS USING TRANSFORMER COUSING TRANSFORMER COUSING TRANSFORMER COUSING TRANSFORMER CODESDESDESDES In general, Fender amps th

8、at dont 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

9、 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 for time these parts may have spent in inventory storage. RadioFans.CN 收音机爱 好者资料库