KT66 DATASHEET PDF

And no, it is not as easy as you would like, because a bad getter indicates a defective tube. That is why getterology is of little use for most people. This becomes particularly clear, when tubes with obviously defective getters are praised on Ebay as excellent working, and both seller and buyer do not notice the bad getter, indicating the end is near. Strangely, there is no interest for this, though it is clear to see by the getter often, the tubes are rubbish. More difficult is also the reverse situation: The getter looks fine also to me and when you test such tubes, they are rubbish. Here, the biggest mistake of all is made: Many think, a fine looking getter is the same as a fine working tube.

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The KT66 was essentially a 6L6 redesigned with a larger cathode and a shorter, fatter anode. Because of their excellent datzsheet characteristics and overload tolerance, KT66s are preferred by some guitar players for use in guitar amps in place of 6L6GC.

By contrast the very latest Russian manufactured tubes not only carry the same internal electrode structure as the original Datashert they now look the same they also have the same rugged electrical characteristics and can withstand a high voltage on grid 2 comparable to the anode voltage rating, allowing greater power output afforded by higher voltage capability when run in ultralinear connection. Languages Polski Edit links. It was ace for audio hi-fi but the electrons took longer to reach the anode and were more open to influence from magnetic, etc, fields on the way.

The shape of the envelope is a mixture of the classic shape and datashewt wide tube. This page was last edited on 6 Mayat The beam tetrode design was also undertaken to avoid the patents which the giant Philips firm held on power pentodes in Europe.

Class-A amplifiersingle-ended Class-AB amplifierpush—pull. The two tubes were nearly interchangeable, except that the KT66 was somewhat more rugged than the early metal 6L6. From the s KT66 s lacked the internal carbon dust coating of the glass bulb.

Moreover, under HF conditions the electron stream was not perfectly in phase with the grid signal and this resulted in a loss of output power if used for RF applications. Our exhibit is a post-WWII device, probably dating from the s.

EMI engineers Cabot Bull and Sidney Rodda improved the Harries design with a pair of beam plates, connected to the cathode, which directed the electron streams into two narrow areas and also acted like a suppressor grid to deflect some secondary electrons back to the anode. Owen Harries and marketed by the Hivac Co. M-OV ceased glass vacuum tube manufacturing in ; their old audio tube types became valuable collectibles. All articles with unsourced statements Articles with unsourced statements from March Articles containing potentially dated statements from All articles containing potentially dated statements.

In other projects Wikimedia Commons. Here each single valve of the push pull pair is replaced with two valves connected in parallel. In the s the production used black base caps and pre-WWII had the classic envelope shape. By using this site, you agree to the Terms of Use and Privacy Policy. It is not uncommon to find these valves used ddatasheet parallel push pull. The KT66 had less rapid acceleration, longer electron paths, and almost no kink.

In the KT66 was tk66 as the finest audio tube in the world. Type KT66 was first introduced in Vacuum tubes Guitar amplification tubes Telecommunications-related introductions in Due to the metalisation on the inner of the envelope the electrode structure is obscured. From Wikipedia, the free encyclopedia. TOP Related Posts.

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KT66 DATASHEET PDF

Mimuro In the KT66 was advertised as the finest audio tube in the world. The two tubes were nearly interchangeable, except that the KT66 was somewhat more rugged than the early metal 6L6. Class-A amplifiersingle-ended Class-AB amplifierpush—pull. The shape of the envelope is a mixture of the classic shape and the wide tube.

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KT66 Tube Reviews

One on the normal channel of a Marshall Topology and another on the Bright Channel. Each preamp tube can be ran individually in Triode and Pentode mode. They also have a Jump switch to allow the mixing parallel and a Cascade switch for series. I am currently adding relay switching. Each has a 1K pot for a cathode resistor. The coupling caps from the first stage have been increased above standard Plexi from.

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Shuguang KT66

The KT66 was essentially a 6L6 redesigned with a larger cathode and a shorter, fatter anode. Because of their excellent datzsheet characteristics and overload tolerance, KT66s are preferred by some guitar players for use in guitar amps in place of 6L6GC. By contrast the very latest Russian manufactured tubes not only carry the same internal electrode structure as the original Datashert they now look the same they also have the same rugged electrical characteristics and can withstand a high voltage on grid 2 comparable to the anode voltage rating, allowing greater power output afforded by higher voltage capability when run in ultralinear connection. Languages Polski Edit links. It was ace for audio hi-fi but the electrons took longer to reach the anode and were more open to influence from magnetic, etc, fields on the way. The shape of the envelope is a mixture of the classic shape and datashewt wide tube.

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