Fender introduced the Blues Junior in 1995, and has revised and updated it periodically since then.Blues Junior history can be divided into two major categories: the early amps with green circuit boards and the later ones with cream-colored boards.The cream-colored board is laid out entirely differently (and better) than the green board. But the old ones sound darker, while the new ones are brighter, with more emphasis on treble tones.One is not necessarily better than the other; the dark tones are nice for blues and jazz, while the new amps do brighter tones better.The electrodes are attached to leads which pass through the envelope via an air tight seal.On most tubes, the leads are designed to plug into a tube socket for easy replacement.When Robin Trower segued from his wah-driven blues-rock riffing into the slowed, deep-blues groove of the second half of his ’74 anthem “Too Rolling Stoned,” he kicked it over to a progressively more aggressive overdrive sound.
Although the envelope was classically glass, power tubes often use ceramic and metal.If you are not familiar with working on vacuum tube equipment, you should consult an experienced technician before opening any equipment containing vacuum tubes. The Free Information Society will not be responsible for any injury or damage caused to you or your equipment.*** Early Silverface Logo on Standard Silverface Grillcloth So, you've heard all of your guitar playing life, whether it be for 2 years or 25, that you don't want a Silverface Fender amp.I can't say today that they are the "best kept secret", because over the past few years, the prices on them are steadily climbing..obviously, the secret has gotten out. For most purposes, the vacuum tube has been replaced by the much smaller and less expensive transistor, either as a discrete device or in an integrated circuit. and Canadian English) or (thermionic) valve (outside North America) is a device generally used to amplify, or otherwise modify, a signal by controlling the movement of electrons in an evacuated space.