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The circuit designs of these amplifiers, however, were new. The Portaflex bass amp was reissued, with updates intended to make it more appealing to modern bass players. The Ampeg GVT series, introduced around 2010, is a series of tube amplifiers built in South Korea, employing the Baxandall tone circuit. [27] [jargon]
Ampeg B-15 Jess Oliver (born Oliver Jespersen) (January 20, 1926 – June 30, 2011) [ 1 ] was a musician, an inventor , electrician and amplifier repairman best known as the vice-president of Ampeg and patent holder for many of Ampeg's most successful products, most notably the Portaflex B-15 .
The first amp in Ampeg’s Portaflex series was the B-15, a 2-channel tube amplifier with per-channel volume controls and shared Baxandall-type tone control, housed within a ’flip-top’ tuned-port cabinet design mounted to a dolly. Shortly after the B-15’s introduction in 1960, it became the most popular bass amp in the world.
Reballing involves dismantling, heating the chip until it can be removed from the board, typically with a hot-air gun and vacuum pickup tool, removing the device, removing solder remaining on the device and board, putting new solder balls in place, replacing the original device if there was a poor connection, or using a new one, and heating the ...
Dan Armstrong Ampeg era "see-through" guitar, in the Phoenix Musical Instrument Museum.. Armstrong was born in Pittsburgh, Pennsylvania.He started playing the guitar at age 11, and moved to New York in the early 1960s in order to work as a studio musician and guitar repairman.
All amps are individually made: "it's possible that no two Trainwreck amplifiers actually have the exact same circuit". They are usually equipped with three 12AX7 preamp tubes. [10] Fischer made three kinds of models: Express; two EL34 or two 6V6 output tubes. Two 12AX7 preamp tubes and one 12AX7 phase inverter. (Highest-gain amplifier in the ...
The Ampeg SVT is a bass guitar amplifier designed by Bill Hughes and Roger Cox for Ampeg and introduced in 1969. The SVT is a stand-alone amplifier or "head" as opposed to a "combo" unit comprising amp and speaker(s) in one cabinet, and was capable of 300 watts output at a time when most amplifiers could not exceed 100 watts output, making the SVT an important amp for bands playing music ...
A Peavey bass amp head with an Ampeg 8x10" speaker cabinet. By the 1960s and 1970s, semiconductor or transistor -based amplifiers (also called " solid state ") began to become popular. This was in large part because for a given wattage level and feature level, solid state amplifiers are less expensive, lighter weight, and require less ...