Dating fender tweed amplifiers

Posted by / 23-Sep-2020 14:57

The serial number and date code on the original mains transformer and potentiometers indicated a manufacturing date of 1957.

A ’57 Vibrolux would have been fitted with a Triad #108 output transformer, but this amp’s transformer product code read 125A1A – making it identical to the Schumacher-manufactured unit Fender installed in 60s Princetons, Deluxes and Deluxe Reverbs.

The '59 Bassman, '65 Super Reverb, and Custom series Vibro-King utilize the P10R for its snappy vintage bite.

Over the last decade, we have also equipped many Limited Edition amps with various Jensen speakers.

The first task was to take a closer look in order to figure out what Ed had actually bought.

The amp was working and the tone wasn’t bad, but it felt a bit lifeless and underpowered.

It is equipped with the Jensen C12N, which is nice and bright, complimenting the midrange punch of the Blues Junior platform. Our latest addition to the family is the GB Twin Reverb, which we developed with jazz/R&B great George Benson.

He recognised that much of the amp’s originality had already been lost, and so was open to circuit tweaks and modifications if they resulted in improved tone.At Fender, we work on new ideas and technologies while also maintaining the heritage of the old 1950s and '60s guitar amplifiers.Some of the most timeless and beloved models like the Tweed Bassman and Deluxe, the Twin Reverb and Deluxe Reverb, originally came fitted with Jensen speakers.To my ears, the overdrive was a bit ragged, and compared with most tweed-style amps with dual-6V6 output stages, the Vibrolux had a lot more clean headroom.The tremolo effect was weak and the speed range seemed to be restricted.

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We have been using the "modern" Jensen speakers for almost 20 years now.

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