Non-Schumacher transformers – It’s been universally accepted that Fender only used Schumacher transformers on amps made in the 1960s and 1970s.
These are marked with EIA code “606” which is the company number for Schumacher.
After that the foreman would add the tubes, turn 'em on and set the bias.” Export models – We’ve confirmed that Fender amps were distributed by Hagstrm in Sweden.
Not only that, but to meet Swedish safety codes, Hagstrm removed the external voltage selector switch (fitted to all blackface and silverface export models) and hardwired it internally (see photos).
Clearly Fender wasn’t afraid to use incorrect parts when they were in a bind. The 5G12 Concert is the earliest version from very late 1959 and early 1960 so the existence of a tweed example, while extremely rare, is certainly plausible since Fender was making lots of tweed amps during the same time period.
These are marked with EIA code “831” and are most prevalent during the 1966-68 time period.leftovers.” Regarding production he recounted the following information: “I think I remember being 'pushed' to come up with 30 of the simpler chassis (Super Reverb? But it wasn't always 'cool guitar' amps, sometimes I was making Fender Rhodes Satellite amps on bent aluminum, sometimes only Champs.I remember two 'suits' from upstairs standing behind me occasionally doing time studies.Working at FMI – I was able to interview a fellow (who wishes to remain anonymous) who worked at Fender in 1972-73 in the amp department.Although his job was somewhat limited, his recollections provided some really fascinating insights to how the amps were built.