Ampeg B-200R - Manuals

Table of Contents: Introduction .............................................................................................3 The Front Panel ...................................................................................4,5 Important Information About Tubes and Tube Products A Brief History Of...

Important Information About Tubes and Tube Products: 6 A Brief History Of The Tube: In 1883, Edison discovered that electrons would flow from a suspended filament when enclosedin an evacuated lamp. Years later, in 1905, Fleming expanded on Edison's discovery and creat-ed the "Fleming Valve"....

Important Information About Tubes and Tube Products (continued): 7 Preamp Tube Types And Usage: The tubes used in the preamplifier (12AX7, 12AU7, 12AT7, etc.) amplify the signal from yourinstrument and shape the sound. They are inherently microphonic (mechanically pick up andtransmit external noises...