Web camsexlive - Dating fender amps transformer
Dating Fender Tube Amps by Serial Number, Part I by Greg Gagliano Copyright 1997, 20th Century Guitar Magazine. Well, we'll get to good parts, but first a little background information is in order.
After reading Teagle and Sprung's excellent Fender amp book, I took them up on their challenge that maybe someday someone will compile enough serial numbers so that Fender amps can be dated that way. I contacted several Fenders collectors and dealers who were kind enough to supply me with data.
Likewise, the brown/blonde Tremolux, Concert, Vibrasonic, Twin, Pro, Super, Vibrolux, Showman, Dual Showman, and Bandmaster used a sequential numbering independent of model, but as with Fender guitars, these were not used consecutively. The 1956 to 1963 Champ, Harvard, Princeton, Deluxe; the 1956 to 1960 Vibrolux, the 1956 to 1964 Bassman, and all the tube reverb units have their own serialization scheme.
The Champ has a "C" prefix, the Harvard an "H" prefix, the Princeton a "P" prefix, the Vibrolux a "F" prefix, and the Deluxe a "D" prefix.
The 4x10 Bassman used the prefix "BM" while the piggyback Bassman used the prefix "BP." The reverb units have the prefix "R." In addition, the tweed Super, Pro and Bandmaster sometimes have the prefix "S" in the serial number.
The blackface and silverface amps (late 1963 to 1980) generally have serial numbers begin with the prefix "A." However, it appears that these were not used sequentially across all models.
His particular area of expertise is in Fender amps made from about 1960 through 1967.