Vacuum tubes, or thermionic valves, are arrangements of electrodes in a vacuum within an insulating, temperature-resistant envelope.Although the envelope was classically glass, power tubes often use ceramic and metal.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.This information is courtesy Fender.com, republished here for your convenience. instrument production history, production dates have been applied to various components.Hit the jump to see just how old that guitar or bass really is. Most notably, production dates have been penciled or stamped on the butt end of the heel of the neck of most guitars and basses, although there were periods when this was not consistently done (1973 to 1981, for example) or simply omitted. Information on Japanese and Mexican-made instruments is included towards the bottom.
Most specifications for a given Fender instrument model change little (if at all) throughout the lifetime of the model.
The Stratocaster was first introduced in spring 1954, it may well be the most popular and copied guitar design ever.
Asymmetrical double cutaway body, contoured body on back and on lower bass bout (where forearm rests), 3 single coil pickups with exposed poles, jack angled into top, tremolo standard (but available without special order), 3 knobs (volume, tone, tone), gold plated parts optional till 1967.
5B6 Bassman amplifiers had two 6SC7 or 6SL7GT pre-amp tubes, two 5881 power tubes and a single 5U4G rectifier tube.
It was designed to generate 26 watts at an 8 ohm impedance load, and offered a cathode-based bias.
While there have been periods of dramatic change—such as the transition periods between the Leo Fender years and the CBS years or the transition between the CBS years and the current ownership—most models are generally feature-specific and do not change from year to year.