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LEAK TL/12 Point One Amplifier. The first commercially produced amplifier with distortion of 0.1% was the LEAK Type 15 "Point One" of 1945, using KT66 vacuum tubes (valves) connected as triodes, with 26 dB feedback over 4 stages including the output transformer. In 1948 LEAK produced the TL/12 which was also rated at 0.1% but featured improved ...
On June 10, 2014, Kevin Hayes was issued U.S. Patent 8,749,310 for "amplifier bias control". This patent covers the only known technique for observing the true underlying quiescent current (idle current) of an output tube (or transistor) under dynamic signal conditions, and then holding it to the stable target value with a precision of 99% or ...
Epiphone released Combo version 3 and a newer version of the head with higher retail prices and feature a variety of tube brands based on availability including Electro-Harmonix, JJ, and Sovtek. The newer versions of the head and version 3 combos feature updated transformers with 4, 8, and 16 Ω outputs and the version 3 combos feature an 8 in ...
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.
The average price for a gallon of gas in California was $6.41 on Tuesday, according to AAA, roughly $0.03 short of the record set in June. In Los Angeles County, the average price for a gallon of ...
A valve audio amplifier or vacuum tube audio amplifier is a valve amplifier used for sound reinforcement, sound recording and reproduction. Until the invention of solid state devices such as the transistor , all electronic amplification was produced by valve (tube) amplifiers.
Gas prices have been on the rise nationwide, but for California drivers, they've skyrocketed in a short amount of time.. The Golden State's average at the pump surged by $0.23 to $5.27 per gallon ...
An estimated 700,000 pool heaters in Southern California will have to switch to electric from gas under the South Coast AQMD's new rule. (Ricardo DeAratanha / Los Angeles Times)