The Fender Harvard is a

vacuum tube A vacuum tube, electron tube, thermionic valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. It ...

(valve) guitar amplifier made by Fender from 1955 to 1963. The Harvard appeared only in a tweed covered "narrow-panel" cabinet, but in two very different circuit designs, namely 5F10 (1955–61) and 6G10 (1962–63). The "Tweed" 5F10 model, launched in 1955, but not in time for the Fender catalog of that year, was a 10-watt amplifier utilising a 6AV6 (from 1956 a 6AT6) preamplifier tube, 12AX7 phase inverter tube,Technically, only half of the 12AX7 was the phase inverter; the other triode served as the second preamp gain stage. a pair of 6V6GT power amplifier tubes, and one 5Y3GT rectifier tube, with a Jensen P10R 10-inch speaker. The amplifier had a very simple circuit and used only a single channel with a two-stage preamp, with just a volume and (treble-cut) tone control. The Harvard was a fixed bias amplifier, using a basic cathodyne phase inverter, but did include a selenium rectifier in the bias circuit. The 5F10 was discontinued in 1961. The extremely rare 1962–63 6G10 Harvard used a single 12AX7, 6V6GT and 5Y3GT; it was simply a way to use up leftover 50's

Princeton Princeton University is a private Ivy League research university in Princeton, New Jersey, United States. Founded in 1746 in Elizabeth as the College of New Jersey, Princeton is the fourth-oldest institution of higher education in the Unit ...

(5F2-A) chassis and tweed cabinets, after Fender had re-launched an all-new class AB Princeton (6G2) in a Tolex-covered "brownface" version. These Harvards sometimes even use old 5F2-A tube charts with the Princeton name scratched out; they can be identified by their Schumacher transformers (the same ones used in the new brown Princeton) and 1960s date stamps. Unusually for Fender, the Harvard had no predecessor and, although the Harvard name was revived later by Fender, no descendants. The Harvard filled a gap between the student Champ and Princeton models and the professional Deluxe. The companion 5F11 Vibrolux was essentially identical to the Harvard, but with an added tremolo circuit driven by one side of a dual-triode 12AX7 which replaced the Harvard's single-triode 6AV6/6AT6, and was built into a Deluxe cabinet. The 5F10 Harvard's dimensions were 16.5 × 18 × 8.75 inches (42 × 46 × 22 cm), and it weighed 20 pounds (9 kg). The most famous user of the Fender Harvard, in conjunction with a

Fender Telecaster The Fender Telecaster, colloquially known as the Tele (), is an electric guitar produced by Fender (company), Fender. Together with its sister model the Fender Esquire, Esquire, it was the world's first mass-produced, commercially successfulLes ...

(or

Esquire Esquire (, ; abbreviated Esq.) is usually a courtesy title. In the United Kingdom, ''esquire'' historically was a title of respect accorded to men of higher social rank, particularly members of the landed gentry above the rank of gentleman ...

) guitar, was

Steve Cropper Steven Lee Cropper (born October 21, 1941), sometimes known as "The Colonel", is an American guitarist, songwriter and record producer. He was the guitarist of the Stax Records house band, Booker T. & the M.G.'s, which backed artists such as ...

, who said that he used the amplifier for most of the classic recordings made with the

Stax Stax can refer to: * StAX, (Computer Programming) Streaming API for reading and writing XML in Java * Stax Ltd, a Japanese brand of electrostatic headphones * Stax Records Stax Records is an American record company, originally based in Memphis, ...

house band Booker T. & the M.G.'s, including

Green Onions "Green Onions" is an instrumental composition recorded in 1962 by Booker T. & the M.G.'s. One of the most popular soul songs ever, and R&B instrumentals of its era, it utilizes a twelve-bar blues progression and features a rippling Hammond M3 ...

and (Sittin' On) The Dock of the Bay. Stephen Stills is also a user of the Harvard particularly for overdubbed solos, the quick compression when used with humbuckers leads to a fluid lyrical single note passages. Stills is also a fan of the related 58~60 Vibrolux for tracks on record and live.

Notes

References

{{Fender

Harvard Harvard University is a private Ivy League research university in Cambridge, Massachusetts, United States. Founded in 1636 and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of higher lear ...

Instrument amplifiers