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A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers in the 1960s and 1970s.
A few Dumble amps have a Dumbleator circuit built in, but most have "un-buffered" input jacks that tap directly out of the pre-amp and into the power amp. Dumble likely created this external loop because of the difficulty of fitting effects loop buffering into the amplifier chassis (and the limited use of effects loops for most players).
In the early 2000s, the company worked with Bruce Egnater of Egnater Amplification to create the MTS (Modular Tube System) series of guitar amplifiers. These involve a single amp head consisting of the power amp and part of a preamp, and slots in the head (one for the RM20 head and combo, two for the RM50 head and combo and RM22 head, and 3 for the RM100 head and RM100C combo, and 12 for the ...
The EL34 is a thermionic vacuum tube of the power pentode type. The EL34 was introduced in 1955 by Mullard, which was owned by Philips. [1] The EL34 has an octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits; it was also designed to be suitable as a series regulator by virtue of its high permissible voltage between ...
The "Tweed" 5F10 model, [2] launched in 1955, but not in time for the Fender catalog of that year, [3] was a 10-watt amplifier utilising a 6AV6 (from 1956 a 6AT6) preamplifier tube, 12AX7 phase inverter tube, [note 1] a pair of 6V6GT power amplifier tubes, and one 5Y3GT rectifier tube, [4] with a Jensen P10R 10-inch speaker. The amplifier had a ...
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Sovtek is a brand of vacuum tube owned by Mike Matthews's New Sensor Corporation and manufactured in Saratov, Russia. They are often used in guitar amplification and include versions of the popular 12AX7, EL84, EL34, and 6L6 vacuum tubes. Many of the vacuum-tube amplifiers in modern production are factory-fitted with Sovtek valves. [1]
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