I pretty much am going to have to build from scratch. The bad thing is, I stripped everything except the transformers, the aluminum cased multi-cap and the tube sockets. I did find a micro champ by ALPERN Amplification that used the 6AQ5 but I don't know how to ensure the voltages coming from my transformer will be right because my output is different than what his transformer was. The amp also had a 6X4 Rectifier and 5879 (which I think was used for the microphone?) any way, The Tape player played fine with no crackle or unusual noises so I figure the tubes are good. I see several circuits with a 6BQ5 but haven't found many built around the 6AQ5. Rather than just modding the amp, I thought it might be easier to just do it over because I didn't need the recording portion of the circuit. Several niche applications, such as photomultiplier tubes.Anyone ever see a basic practice amp built with a 6AQ5 output tube?Īs I stated in my earlier post, I had an old reel to reel that had a working amp.Vacuum fluorescent displays, which are thin vacuum tube displays that display simple information such as numbers, are still fairly common in audio / video equipment and household appliances, although they are being replaced by LED displays.Musicians who play electric musical instruments such as electric guitar sometimes use vacuum tube amplifiers.People who enjoy listening to music on high-quality home stereo systems sometimes buy amplifiers which use vacuum tubes.Systems which need high frequency operation, high-power output or very high amplification, such as television transmission, X-ray machines, radar, and microwave ovens.Some devices that still use the vacuum tube, however, include: Many devices today rely on the transistor over the vacuum tube. In the 21st century, vacuum tubes are rarely used in common electronic equipment. Wikimedia Commons has media related to Vacuum tubes. Television receivers continued using the cathode ray tube until the mid-2000s.Ĭurrent uses Cavity magnetron tube from a microwave oven High powered electronics such as broadcasting transmitters were transistorized more slowly. At this time, most radios, television sets, and amplifiers began using transistors instead. Eventually, they were also much cheaper than glass vacuum tubes. In addition, unlike vacuum tubes, they were much less likely to be damaged by being dropped and had extremely long life. The transistor became cheaper in the 1960s and was much smaller, worked on lower voltages, and used less power. Many other kinds were invented for various purposes. Lee De Forest invented the "audion" in 1906 (which was improved by others as the triode in 1908) and used in the first telephone amplifiers. John Ambrose Fleming invented the first vacuum tube, the diode, in 1904. Vacuum tubes were used in the first computers like the ENIAC, which were large and need much work to continue operating.Īlthough the vacuum tube was invented by John Ambrose Fleming in 1904, it was Thomas Edison who discovered the "Edison effect" in 1883 which states that electricity does not necessarily need a solid material to move through it can move through gas or vacuums as well. Most are made of glass, thus are fragile and can break. The anode is the part that accepts the emitted electrons. The cathode is heated, as in a light bulb, so it will emit electrons. Structure of a vacuum tube triode A vacuum tube, type 6P1PĪ vacuum tube, also called a valve in British English, is an electronic device used in many older model radios, television sets, and amplifiers to control electric current flow.
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