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The 833A is a vacuum tube constructed for medium power oscillator or class B or C amplifier applications. It is a medium-mu power triode with 300 watts CCS or 350 watts ICAS anode dissipation. The long grid and anode leads, plus high internal capacitance, limits this tube to 15-30 MHz maximum frequency.
Current production 6N1P-EV tube (1999) branded with the original factory logo (right) and Svetlana brand name (left) The 6N1P (Russian: 6Н1П) is a Russian-made miniature 9-pin medium gain double triode vacuum tube intended for use as a line audio amplifier and cathode driver. Basic data: Uf = 6.3 V, If = 600 mA; μ = 35; Ia = 7.5 mA; S = 4.35 ...
He subsequently contacted Howard Dumble, and was able to buy a used amp and have Dumble refurbish it. Reportedly he has since bought more. [10] Since the 1980s, Dumble covered the preamp circuitry of his amps with a thick layer of usually opaque epoxy, presumably protecting his circuit's exact design from prying eyes. [11]
The amplifier is a high-end model designed for audiophiles, costing $15,000 or more. It can produce from 14 to 20 watts (at 8 ohms) per channel. This is considerably more than the standard 10w per channel from a typical 300B amplifier. Like all their products, the amplifier is built in America. [8]
Vacuum tubes used in electric guitar amplifiers. Particularly the ones that played important role in shaping modern image of tube sound , as well as notable former and current manufacturers of those tubes.
JJ Electronic was founded in 1993 by Jan Jurco, using the old Tesla machinery for the manufacture of vacuum tubes. Eventually, JJ Electronic started to produce its own line of vacuum tubes and electrolytic capacitors, mainly targeted at high-end audiophile and guitar amplifier applications.