6c33c tube sound software

This tube was regarded as the first prototype of the wellknown sovtek 6c33cb tube at that time. We used this amp on a pair of big planar magnetic speakers which are notoriously difficult to drive at the new york audio show to great effect. The 5 calibers to claim the most powerful handgun in the world title reupload duration. At lower currents, the plate resistance increases, a factor to bear in mind when selecting the bias point of the tube. This page details my first trials with the 6c33c triode in the pp zeus follower configuration which i made in may 1995. Both gave me the sound i was looking for, but the lamms are superior by quite a margin as you would expect for. The 6c33c is one of the strongest triode tube in the world made for a 5000 hours lifetime in the coldwar ages for the. I saw a otl design with 6c33c b tubes but with a other driverstage. For comparison, i also have an art audio px25 set amp6 wpc, welborne labs drd 300b set monoblocks 7wpc, and an audion sterling etse el34 set integrated. Moreover, it use the high quality output transformer hasimoto.

While this driver provided lower drive impedance and twice the signal swing of. Also history is an interesting topic as it was developed for use as a voltage stablizer in russian mig fighter jets. Yet, tube manuals, even ones from the 1930s, are filled with plate curves. The people are so filled with some foolish prejudges and faulty notions about 6c33c that i deseeded to put together a brief 6c33c user manual. Well, the 6c33cb tube was not originally intended for hifi amplifiers. Ahn designs his chassis plates with cad software, and has them made in.

Triode mode pentodes sound great, but in pentode mode they sound really bad. Single ended ecc99 6c33c amplifier with regulated tube ps. Act audio vacuum tube amplifier 6c33 is a single ended pure class a 15 watt monoblock with an indirectly heated triode. It uses 2 tube 6c33c, 2 tube el34 driver and 1 tube 12at7 pre. The pair of 6c33c b tubes providing 75 wpc in my bat vk75se are biased 200ma with 210v plate voltage.

For the sake of this paper, the 6c33cb tube will be used for numerical. This is the infamous triode tube that was unknown to westerners until a. Dakesue in japan was the first person to design a 6c33c b otl power amplifier circuits in 1977. Now with the totally new situation tube amps being made in china and costing next to nothing, my advice to the people needing an amp is to shop in china on ebay and rework the amp to make it decent. Sotki the 80 wpc class a push pulll triode zero feedback monoblock. By the same token, wellbuilt tube amplifiers can deliver the most natural and realistic sound quality than other counterparts can do. While the 6c33c can be used in otl configuration, fluxions av7 is a traditional transformerbased amp. Both gave me the sound i was looking for, but the lamms are. The balanced audio technology dualfilament triode 6c33cb vacuum tube is unique in its ability to deliver high current at a relatively lowplate voltage.

This is a 12wattsperchannel, singleended design, using the russian 6c33cb power tube. Prove what you like, tell us were imagining things, but we know it just sounds better. The proper operational point will be the properly of your plate load, type of acoustic system you use and a few other factors. But audionote, apart from being famous for good sound, is mainly famous for being extravagantly expensive. Sb circuit is designed to reduce hv spark effectively, so distorted sound will be reproduced even though sb is off. Fluxion av7 singleended 6c33c amplifier wall of sound. I had never been alone with a russianmanufactured 6c33c tube. Monoblocks have a fixed bias and point to point internal wiring. That was a revelation, although unnecessarily resembled its. I am anxious to hear how the 6dj8 does in the peach. Tube enthusiasts usually contrast the soft sound of tubes with the harsh sound of. Compared to most power triode tubes the 6c33 has a relatively short service life. I think the best tube today is the 6c33c but also the penthode el519 that was manufactured for use in tv sets as vertical output stage can be used if connected as a triode, i believe the. Sep 16, 2016 set vs otl amps which one offers true tube sound.

Though produced in the ussr, it was mainly supplied to the japanese market. The pair of 6c33cb tubes providing 75 wpc in my bat vk75se are biased 200ma with 210v plate voltage. Some audio products deliver truly superb sound of a kind that really makes all the. Goodsoundclub romy the cats audio site the short 6c33c. For those of you who still have old computers running windows xp 32bit or any other windows 32bit os, i have setup the download availability of my old old standards. Young ahn, a koreanborn electrical engineer, who lives and works nearby me, in the rural farmlands outside brantford, ontario canada. At a bias voltage of 145 v, and a plate current of 400 ma, this tube has a plate resistance of 100 ohm, and a gain of 2. There is a substantial stock of the tube thousands according to one distributor still available. Rather than a semiconductor, but without su transformer, the sound directly drive speakers tube is worth a listen to one, even a circuit, so as to remain part untapped still a great 6c33c b further enhanced by the appearance of the creative impulse.

Taking the advantage of technical knowledge and expertise accumulated to date researching for over 20 years being attracted and absorbed in premium analog audio systems, lansing audio has been producing the highest quality vacuum tube sound systems. This is the infamous triode tube that was unknown to westerners until a mig25 fighter jet was landed in japan by a. Audio by susan parker, the art of sound reproduction. The line preamp stage use 6sj7 tube, the driver stage use 6sn7 to driver 6c33c power tube. These specifications are provided asis, with no warranty of any kind. A pair of welborne labs laurel iix with western electric 300bs, and a pair of lamm ml2. Act audio vacuum tube amplifier 6c33 highend vacuum tube. In pentode tube amps allways make a triode mode conversion unless there is a switch to change the modes.

Once employed in mig fighter aircraft, this rugged dualtriode forms the foundation for the. This has to be one of the reasons for using it in many amplifier designs. Rebuilding audio mirror amps for 6c33 triodes troels gravesen. This of coarse is decadent, but they do sound good. Also history is an interesting topic as it was developed for use as a. Was talking with various audio people about the 6c33c i was amazed that people are so clueless about this tube. Autoplay when autoplay is enabled, a suggested video will automatically play next. In my experience the 6sn octals provide more of the classic tube sound vs. Act audio vacuum tube amplifier 6c33 highend vacuum. The 6c33c tube work at set single ended triode mode to driver hasimoto h20600 high quality output transformer, the hasimoto h20600 cut core orient high b output transformer has very low insertion loss 0. It is more powerful, quicker, brighter and much more than any other tube amplifier with transformers. For instant, in 145v, the current went through the tube could be up to 400ma. Russian tubes unknown in the west until recently, such as the 6c33cb from.

The 6c33c is today probably the best tube available for otls, it is a pure triode, it can pass high continuous currents and it is relatively cheap and easy to come by, for more info about this tube see. If you feel that in your amplifier 6c33c sounds better with automatic of semi. After 15 previous years with transistor amps i found the answer tubes. Thus we settled on ecc99 ecc99 6c33c topology, or a 4tube 2 tube per channel stereo amp. Forgoing an output transformer, sometimes otl amplifiers are dccoupled to the. The sound from this wt40 more than suggested the 6c33 tubes might deliver a sound at least equivalent, if not superior to the 6as7 tubes, and getting more than twice the output doesnt hurt either. The wrapping is a good idea if russian chinese ceramic or british teflon b7a sockets are used, just strip away about 40mm of insulation then wrap the wire around the socket pins a few times before soldering, this only needs to be done with the filament pin contacts. I have 4 6c33cb tubes, two 5c8s rectifiers i just thought they looked cool together but a bit larger choice of driver tubes.

Futher the powersupply must be cheap, this means use cheap transformators such as 230vprim2 x 115vsec for powerstage, 230vprim2 x 12v for filaments and 230vprim230vsec small one for input and driverstage. Even so the tolerance in gm of 6c33c is rather small 10% at higher currents, this shows that it is a real high quality tube. The balanced audio technology dualfilament triode 6c33c b vacuum tube is unique in its ability to deliver high current at a relatively lowplate voltage. I discuss why why you need so many tubes such as 6as7, 6336. O ne of the most particular looking electron tubes on the market, the 6c33c. Fwiw, the 6c33c b is out of production and is not expected to go back into production as the plant that built it is gone closed about 3 years ago. I remember my first encounter with proper tube setup back in 1990.

Since 6c33c is low impedance power tubes, we use otl circuit design to eliminate output transformers distortion and limited frequency responses, therefore mp702 sounds very natural, clean and transparent. However, analog software still seems to be able to deliver the most musical and reallife like sound quality that can satisfy our desire to appreciate the music. I know that bat is running it in their tubes amps but i dont recall. I have not needed to replace a tube socket in 10k hours of service. Use of these parameters shall be entirely at the users own risk. The data of this tube was much better than anything made before in the west and sanei of japan imported some 6c33c tubes for audio application in 1997, renaming them ec33c for the japanese consumer. This is a project that quickly became the focus in lots of tubeoriented forums and has inspired long threads and many iterations, including further articles published in audioxpress from the author himself. We may choose flea powered triodes for a lot of reasons, but bass grip or lowend dynamics is not their middle name. There seems to be more sound from within the recording, sometimes too. Welcome to canuckaudiomart, a classifieds site for used audio and hifi. The amplifier use one 6c33c power tubes work at set single ended triode configuration status to provide class a 18w adequate output. Received 2 pairs of haltron qqe0320 the sound compares to others tubes i have,the main differences is the size of the tube which is smaller than for example the 832, and distance between the 2 anode pins on top of tubes are closer together and are slightly bigger if you use the stock connectors you will have to enlarge the female part of connector for anodes to fit in which will be loose. Additional details are available in the 6c33c tube amplifier thread. This is a project that quickly became the focus in lots of tubeoriented forums.

Many set tube power amplifier in hiend audio market, their have the output. Unlike the normal transformercoupled, tubebased power amplifiers that use common and readily available output tubes, such as the el34 and 6550, and simple input and driver circuits, otl power amplifiers use oddball tubes, such as the 6as7, 6c33, el509, and 26hu5. This page is about otl amps, strengths and weaknesses, and why not having an output transformer may ruin good music. The tube does possess excellent audio characteristics, and is now used in numerous commercial and diy amplifiers. Chinese amps coming to us via hong kong look great and sound horrible.

I will be rebuilding this shortly using the same transformers and auto biasing as per the vmos line driver, and will update this page accordingly. The power supply is contained in an external enclosure. The av7 is named after alessandro volta, who invented the electric battery. Each mp702 employs four 6c33c power tubes to provide 100w high output power. I think the best tube today is the 6c33c but also the penthode el519 that was manufactured for use in tv sets as vertical output stage can be used if connected as a triode, i believe the 6c33c is the more linear of the two. Soviet mig 25 jet fighter for a serious military using, so the 6c33c is a very robust build tube, reason of the military aircraft using, in a jet fighter. Hello, the russian military used to replace the sockets more often than the valves from what i have heard. For the sake of this paper, the 6c33cb tube will be used for numerical example. Unlike so many other tube amplifier manufacturers, you wont find kt88, 6550. Both use 6sl7 and 6sn7 input and driver tubes to drive the 6c33cb output tube.

The 6c33c tube work at set single ended triode mode to. Highquality russian audiophile tube 6s33sv 633 in russian. For the sake of this paper, the 6c33c b tube will be used for numerical example. My guess is that most graphs in tube manuals are not born of a curve tracers output, but only the result of a handful of spot point data lists and a french curve and a steady hand.

In other words as the grid plate distance is only 0. Apr 03, 2020 otl a new direction of electric tube amplifier sound made by otl amplifiers is not as neither digital or transistor ones. The gain stage need not provide a lot of amplification, though, and can be the other half of a twintriode ecc99. Peakperforming bat 6c33c b vacuum tube delivers high current at a relatively lowplate voltage. All the other designs do not use 6n6p and 6c33cb tubes, i got a lot of them and i like the sound of the 6n6 tube.