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Topic: 6SN7

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	6SN7 TUBES IN STOCK
		The 6SN7 tube is a medium-mu twin triode in an octal based package, usually glass, although some metal envelope types were made.
		I suspect these are cylindrical plates, as most of the European 6SN7 varieties have been this type.
		This is the rare early 1940s version of the military 6SN7 that predates the brownbase series, this version just slightly later than the nickel base version.
	www.audiotubes.com /6sn7.htm (5237 words)

	6SN7 Encyclopedia (Site not responding. Last check: 2007-10-29)
		Numerous other variations on the 6SN7 type have been offered over the years, including 7N7 (Sylvania 1940, loktal-base version), 5692 (RCA 1948, a super-premium version with guaranteed 10,000 hour lifetime), 12SX7 (RCA 1946, intended for use in 26-volt aircraft electronics), 1633 (RCA 1941, also for 26-v radios), 6042 (1951, another 1633 type), and 6180 (1952).
		The designer of the famous Williamson amplifier, one of the first true high-fidelity designs, suggested use of the 6SN7 since it was similar to the British triodes that he used in his circuit.
		Its six 6SN7 tubes are still produced in Russia and the USA, and the ten 6AS7G are either made by Sovtek or Svetlana; both tubes are commonly...
	www.hallencyclopedia.com /6SN7 (538 words)

	ATMA-SPHERE M-60 MK. II OTL POWER AMP TEST
		The balanced XLR inputs are connected to a 6SN7 configured as a differential amplifier.
		The cathodes are connected to the plate of a series-connected 6SN7 cascoded constant-current stage.
		The plates of the 6SN7 differential input pair are series connected to the cathodes of another pair of 6SN7s that cascode the differential pair.
	www.atma-sphere.com /reviews/ga (1957 words)

	The deHavilland Electric Amplifier Company UltraVerve Line Pre-Amplifier Review By Dick Olsher (Site not responding. Last check: 2007-10-29)
		The 6SN7 is driven with kid gloves at about one watt plate dissipation, so expect long tube life.
		The UltraVerve's single gain stage lives and dies by the choice of 6SN7, since the pre-amplifier is adept at revealing differences between the good, the bad, and the ugly.
		It stands to reason that the circuit's simplicity, tube rectification, and of course, that fabulous 6SN7 big-tone are in great measure responsible for this level of directness and musicality.
	www.enjoythemusic.com /magazine/equipment/0404/dehavilland.htm (1515 words)

	Home Brew Regenerative Receiver
		The tubes are a 6V6 used as the regenerative detector, and a 6SN7 used as a dual triode audio amplifier.
		The potentiometer control on top of the chassis is a volume control connected between the two triodes of the 6SN7.
		The phone jack on the front is insulated from the chassis and is in line with the B+ to the plate of the final 6SN7 triode.
	oak.cats.ohiou.edu /~postr/bapix/Regen_HB.htm (2029 words)

	Toob Madness Or The 6SN7 Zoo by Raymond Chowkwanyun
		The 6SN7 is an octal tube used either in preamps or as a driver in a power amp.
		There is a body of opinion that considers the pinnacle of octal-based preamp design to be the MFA Luminescence B1C or Lumi for short.
		The 5692 is a militarized version of the 6SN7, originally designed to work with artillery (all the vibration was destroying tubes at a frightening rate).
	www.enjoythemusic.com /magazine/equipment/0304/6sn7.htm (682 words)

	Stereophile: Cary Audio Design SLP 05 preamplifier
		Developed in 1939, the 6SN7 appeared just in time for America's involvement in World War II, and its use in a variety of military settings spurred a remarkable level of demand, the influence of which continues to be felt in the new/old stock (NOS) tube marketplace.
		Today, the 6SN7 remains popular among high-end audio engineers, having surpassed the otherwise ubiquitous 12AX7—the miniature dual-triode that RCA developed in 1946, ostensibly as a replacement for the 6SN7—in some parts of our own community, if not the more lucrative industry of musical-instrument amplifiers.
		In particular, the single-ended-triode movement embraced the 6SN7 and its variants for use as a small-signal voltage amplifier.
	www.stereophile.com /tubepreamps/906cary (1381 words)

	Tip_44
		The BV was borne in a creative spark some two years ago as a showcase for the venerable 6SN7 dual triode, an octal with a reputation for being a great driver tube.
		The first two criteria are based on the desire to keep things fairly simple and to allow the 6SN7 to dominate the sonic signature of the preamp.
		Their voltage drop may need to be tweaked from the value indicated in the schematic to obtain 6.3 VDC.
	www.blackdahlia.com /html/tip_44.html (1872 words)

	CT-100 simplified theory
		In 1999 I succumbed to curiosity and bought a new one from AES for a few bucks.
		Clearly relabled as a 6SN7, it was made in Russia as a 6H8C.
		The transformer used for positive feedback from plate to grid does not have the conventional isolated windings.
	home.att.net /~pldexnis/CTC2_how_it_works/CTC2_horiz_osc.html (711 words)

	6SN7 / 5692 Vacuum Tube List
		The 5692 is a commercial "premium" version of the type 6SN7 tube.
		Some say these are best sounding 6SN7 of any type including the much coveted red base 6SN7's.
		This is also a close relative to the 6SN7 made in Europe.
	www.vacuumtubes.com /6sn7.html (1167 words)

	Cary Audio Design
		The input signal from the preamp or line source is direct-coupled to the grid of one section of the 6SN7 input.
		The drive signal is amplified through this first section in a class-A grid-driven circuit with the output signal inverted 180' out of phase at the anode, then coupled to one half of the push-pull bank of KT88s.
		At the same time, the second half of the dual-triode 6SN7 is cathode-driven in a grounded-grid, noninverting, class-A gain stage coupled to the other half of the push-pull bank of KT88s.
	www.caryaudio.com /press/reviews/may97b.html (1088 words)

	diyAudio Forums - Recommended 6SN7 and 6SL7
		I found someday a notice that: "the 6SN7 was the tube that the USA made great".
		Besided that the 6SN7 is made by a lot of manufactorors and there is a lot to choose from.
		Every 6SN7 has of course it's different "sound", but that is obviously very depending on the schematic/components/complete system.
	www.diyaudio.com /forums/showthread.php?threadid=56439&goto=nextnewest (618 words)

	ampage > Music Electronics > Guitar Amps : 1 : good use for 6sn7
		I have looked at a bunch of old schematics, and I have seen the ampeg schematic using the 6sn7 (and a few other schematics), but it seems that this tube was used for phase-inverters or to drive a reverb tank, rather than as a straight ahead gain stage.
		Wouldn´t it be hard to desing oscillator with 6SN7 since it has so low gain.
		I'd do it so the slow, albeit weak, pulsing AC was connected right to the unbypassed cathode of a preampstage biased at only 1 or 2 volts...
	www.firebottle.com /fireforum/ff.cgi?cmd=vt&fid=ga&tid=1075345628jrkXeKA (644 words)

	The 6SN7 - the best general-purpose triode?
		Unless the special characteristics of the GTA or GTB types are important to the discussion, the name "6SN7GT" will be used throughout.
		Interestingly, some European companies made American equivalents, and often named them simply "6SN7", both for convenience, and more likely, since they didn't care about the subtleties of American tube naming conventions.
		Extensive description of the history and different variants of the 6SN7.
	www.6sn7.com (1740 words)

	The Tube CAD Journal: Using a 6SN7, 8SN7, or 12SN7 Interchangeably
		Since the 6SN7 (600 mA) draws twice the heater current that a 12SN7 (300 mA) does, the resistor will experience twice the voltage drop with the 6SN7 as the 12SN7.
		And when the 6SN7 is used, the resistor will drop 12.6 volts, leaving 6.3 volts for the 6SN7.
		As this resistor will dissipate 7.5 watts of heat with the 6SN7 and 3.75 watts with the 12SN7, it should be rated for at least 10 watts and 20 watts much would be safer.
	www.tubecad.com /july2000/page8.html (429 words)

	Product Review
		In fact, the use of the 6SN7 was one of the reasons I was originally interested in the Diva preamp.
		The KR10 tube used in the preamp has been modified, so that it now has a pin structure that is identical to that of the 6SN7.
		This means that KR10 tubes and 6SN7 tubes can be interchanged in the Diva preamp, although we should recognize that they have different operating parameters, and therefore, the preamp can really only be optimized for one tube or the other, unless some type of switch is installed.
	www.hometheaterhifi.com /volume_8_2/diva-classic-100-tube-preamplifier-4-2001.html (2807 words)

	6SN7 Info & Links
		It was widely used in the early days of television as the vertical amplifier, and it's use was so common in most TV chassis designs that vintage 6SN7 tubes are still fairly easy to find today.
		The demands for these tubes today are primarily in vintage and recent design audio amplifiers and preamplifiers of the high-fidelity type, up to and including the most expensive and esoteric.
		It seems there is a 6SN7 tube for every taste and budget, and some of the vintage versions are being hunted to extinction, especially those made for the military.
	www.tubeseller.com /6sn7info.html (1864 words)

	diyAudio Forums - 6922 vs 6SN7
		To suggest slipping a E88CC in place (lowering the voltages as suggested) of a 6SN7 will Not work as the design considerations for using a E88CC tube are Completely different than using a 6sn7.
		The 6SN7 tube is easy to design for, as it is difficult to achieve an overly bright sound because of its limited frequency response.
		One uses certain resistors and capacitors to optimize the sound for the 6SN7.
	www.diyaudio.com /forums/showthread.php?threadid=88580 (734 words)

	Cathode-follower power amplifiers
		The total distortion is closer to 0.5% and the harmonics extend beyond the third into the eighth.
		Below is a curve trace of the Duncan SPICE model of the 6SN7 overlaid on a GE tube manual set of plate curves.
		Below is a curve trace of the Duncan SPICE model of the 6SN7 overlaid on a Sofia curve tracer plot:
	www.tubecad.com /2005/June/blog0048.htm (1511 words)

	Design Philosophy (Site not responding. Last check: 2007-10-29)
		The 6SN7 came out of a prewar family of medium-mu radio tubes, starting with the single triodes 27, 37, 56, 76, 6P5, 6C5, 6J5, and then, the dual-triode 6SN7, introduced in 1940.
		The 6SN7, used in millions of radios and early fl-and-white TV sets, was replaced by the 12AU7 miniature tube in the early Fifties.
		In fact, the 6FQ7 miniature was introduced as a direct-replacement for the 6SN7, carrying forward the low-distortion characteristics of the 6SN7, but saw very little use in Fifties hifi equipment as a result of higher cost.
	www.nutshellhifi.com /triode4.html (2555 words)

	6SN7
		Nie jest to dokładny odpowiednik 6SN7, lecz jezeli wzmacnicz pracuje z nią prawidłowo, to masz najbardziej dynamicza lampe 6SN7 na świecie z miło pulsującym basem.
		This is the third update on the sound performance of the vintage 6SN7 types.
		I must add that the 5692 is a very quiet tube with excellent speed, if you have equipment where 6SN7 tubes are microphonic, a 5692 may be the best choice.
	www.mparvi.republika.pl /6SN7.html (1023 words)

	My AN Kit 1 SE DIY Project
		To try to find out which one is the best for my 300B amp, I spent a while to collect all these good 6SN7 tubes for my reference, and thinking to find the best tube I like without fancy parts upgrade.
		GE 6SN7 GTB: This NOS tube is a medium envelope and made in Canada.
		From my testing of so many 6SN7 tubes, my conclusion of a finding a good 6SN7 is try to find a good N.O.S tube.
	www.penguinlovers.net /audio/300BSE_proj.html (4729 words)

	[6SN7 Regen Project] - WJ5MH
		When I was in my teens, I spent many hours tuning the BCB, so I felt an urge to use my last coil form to wind an inductor to cover this part of the spectrum.
		I changed it tonight, and now the center wiper is connected directly to the grid, pin 1 of the second 6SN7.
		I can eliminate it by shunting the audio to ground at the first grid of the second 6SN7.
	members.aol.com /wpe8eum/oldregen.html (1762 words)

	SoundStage! Equipment Review - Blue Circle Audio BC21 Preamplifier (6/2000)
		Call me narrow-minded, or just plain ignorant, but there is something about the sound of the 6SN7 tube in a preamp that, to my ears, betters the more commonly used 6922 or 6DJ8.
		I've been told that the 6SN7 is easier to work with and get a good sound out of than a 6922, due to that tube's microphonics and other issues, and, well, I believe it.
		A good 6SN7, due to its dual triode capability, can handle a stereo signal all on its own, though I have seen several preamps, such as the BC21 in question here, use two (one per channel), and the Wyetech Jade, which uses three.
	www.soundstage.com /revequip/bluecircle_bc21_preamp.htm (2192 words)

	PRICE LIST / JAC-MUSIC
		The older Sylvania VT231 with long glass and parallel plated are beautifull, top quality, and unfortunally hard to get and expensive.
		One of their notable innovations was having the plates set at angles to each other (triangular plates).
		It is weird, at the moment we BUY 6SN7 for a higher price than we sold it for some years ago.
	www.elektronenroehren.de /jacmusic/nos/6SN7/6SN7.htm (1078 words)

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