Single ended pentode vs triode. The screen is connected to a tap on the output transformer.
Single ended pentode vs triode Then I'll be in the clover. Biggest problem is bass. Mar 20, 2022 · Over 2-3 watts with a little pentode most manufacturers went push-pull with small tubes rather than single ended with a large one. Further Reading Nov 24, 2024 · Second, the Lacewood and the Marblewood both have Single Ended Ultra Linear (or SE UL) power stage topologies. Mar 14, 2011 · In essence, a pentode/BPT's addition of a G2 eliminates the inherent feedback from the plate present in a triode. Both amps are simple single-ended designs, both use video tubes, and both put out around 2. Apr 1, 2002 · It can switch from full triode @55 watts to full pentode @150 watts, with stops at 1/3 triode and 2/3 triode. With the monopolar 24V power supply, we can expect an output power of about 6W into 8-ohm loads. For many American audio nuts, the idea of a using an ancient triode like the 300B in single-ended mode was a new revelation. Olson (no relation as far as I know) and show the harmonic distortion spectra of a single-ended 6F6 pentode and a single-ended 2A3 triode. I means Single Ended Amplifier is almost Single Ended Triode Amplifier. Nov 4, 2015 · The pentode-like character is seen in high current power “Vertical” JFETs, and the triode-like character is seen in SITs (Static Induction Transistor). Enjoy. The second schematic gives you a choice between pentode mode and triode mode. 6P15P-EV. . Oct 27, 2020 · A single EL84 can easily produce 5W in single ended pentode mode. The EL84 is rated for 12W dissipation, so we can expect . Pretty much. It sounds as good as many triode coupled amps I have heard using the same tubes. Feb 29, 2016 · (This unit has been redesigned and is the only current Single-ended Triode amplifier manufactured in 2024. Triode / Pentode Loadline Simulator v. (Vertical intervals at 20 dB instead of 10 dB. In this example I will use an EL84 because they're commonly used in single-ended guitar amps, and I happen to like it EL84s. Introduction: It seems like a long time ago, but I remember when the first Sound Practices magazine came out. Mar 21, 2023 · Pentode mainly has a screen, r suppression grid, g control grid, s curtain grid, k cathode five electrodes, so-called pentode where the current is flowing from the screen, cathode out, where the current is controlled by the grid, this and the triode is the same, but the pentode than the electronic triode has two more electrodes: curtain grid Feb 9, 2014 · Thanks guys, I didn't want to over-simplify or take the thread into too much detail, but there seemed more to a single-ended design that a single-ended amplifier using a pentode tube wasn't locked into being wired into a pentode circuit, but still can be wired into a triode circuit as I've tried to understand the circuts. 4. I couldn't be happier with the sound, the build quality is second to none and rolling EL34 tubes is a lot easier and more affordable than 300Bs. Mar 12, 2010 · 6AQ5 calls for a 5. I listen mostly to classical music (ranging from chamber music to large scale orchestral) and opera. It would be close. A fine helix (spiral) wire is placed close to the Cathode. Using two in either single ended parallel or push-pull to get 10W output is nothing unusual. Aug 4, 2010 · Triode is very atherial and detailed with huge sound stage and unreal space between insterments. The output power we can expect from a SE pentode is (at best!) a little less than half its anode dissipation. Single-ended amps really float my boat. Which one is better. A valve with a single grid between Anode and Cathode K is a Triode. But I have push pull output transformers which were intended for EL34s in pentode. The phrase directly heated triode single-ended triode amplifier (abbreviated to DHT SET) is used when directly heated triodes are used. 5W rms pentode single ended, but Triode connection curve is very similar with RCA 45 curve is just same as RCA 45 but sound is very beautiful will be get. I feel more drawn into the music in Triode. ' It uses a pentode RC coupled to a single ended 300B. This is a single-ended triode amp that I built using the 813 transmitting pentode, connected as a triode. Olson's measurements are for single-ended circuits, not push-pull. Super-Triode Zen SE Amplifier The following design adds a triode to a Zen single-ended amplifier, so that the triode can impose its amplification factor upon the output signal. Apr 15, 2008 · A triode can be run in either single ended, paralleled single ended, push pull or parelleled push pull operation. The single-ended triode (SET) amplifier was the first audio amplifier ever developed, dating back to Lee De Forest’s patent of the triode vacuum tube in 1907 and his triode amplifier patent of 1912. Triode Mode. Jun 6, 2003 · To minimize distortion (and to add to the single-ended mystique), it has become fashionable to design single-ended amplifiers with pure-triode output stages. May 3, 2017 · This amplifier brought the single ended sound to audiophiles in Japan in the 1980s and to the USA in the 1990s thanks to Joe Robert's magazine 'Sound Practices. The amp has two toggle switches on the top. Potential design desiderata (in no particular order) might include: A quiet power supply; Output transformer suitable for a pentode (OK with higher rp, taps for UL) No NFB for high output impedance; The TU-8800 is a single-ended power amp kit that supports many popular octal-base pentode and beam power tubes. Single ended penthode will as far as power is concerned. It's like a mantra, regardless of the fact that Pentode gives said amps more output power. The claims were that non-pentode operation always stresses the tubes and leads to less life-time. Pure triode sounds awesome at the expense of inefficiency and massive heat. Tetrodes and pentodes have Jun 21, 2018 · Long story short, I ended up purchasing Radu's single-ended EL34 amp and one of his DHT preamps. 5 watts and I thought it sounded OK. The schematic included uses pentode operation but I've seen variants (unfortunately the discussions are all Chinese) which appear to use triode operation. At some point I'm going to ask Radu to make me a 45 amp for my office. In layman's terms, a single power tube does all the work. My gold standard is still the 2A3, but this project showed me that the EL3N is very close. Nice sweet sound. 5 with a load line drawn from 100mA to 350V = 3500Ω. A single-ended 6AQ5/6005 stereo amplifier with all seven pin tubes would be kinda cool to me. May 1, 2013 · Every SET zealot I can think of (Salvatore, Lampi, Deckert to name three) makes the following recommendation - 'any amp that can be run in either Triode or Pentode mode should always be modded to ensure that it ALWAYS runs in Triode'. 5K primary impedance for class A1 pentode, and 5K for triode. EF184 / 6EJ7 frame grid pentode strapped as triode OP R L = 3 0k 102V 100V. It will have it's own flavor depending on the tube used. That will tell you all that is needed. New to the entire audiophile space, and still trying to find my way into discovering what I want for my setup, and I stumbled upon Single Ended Triodes tube amps (ex: Decware Zen Triode) and the necessary pairing with high efficiency speakers (Zu, Omega), some being single woofer designs. The latter had a relatively high output and when coupled with the single ended pentode output stage made effectively a single valve design. If we want use this design in Single Ended mode only, ofcourse we can change the first penrtode with a triode and the best triodes are the direct heating types. I hear a purer tone and better decay with SE. 1W per channel, with 2. 6W output (experience shows 4 to 5W is realistic Nov 6, 2023 · Using a transformer designed for an EL84 single ended pentode wont get the best out of a triode , so its always going to be a compromise maybe a tapped primary winding could allow better triode /pentode switching , On another EL84 based SE triode amp I have G2 connected directly , I found its happy with 220v at the plate but not much more. This is our another EL34/KT66 single end class A amplifier. Put the money you save into better iron. Feb 20, 2003 · If you have a Class A *source follower* driving your speaker then I expect it will mimic to a certain extent the characteristics of a single ended triode power amp. Here's a tentative first go at a circuit: I'm estimating 4. I will say that when comparing a real triode with a pentode, even an EL34 wired as a triode that there are certainly more opportunities for complications and or artifacts in the sound with pentodes simply because of the higher complexity of the tube design. Zwei zusätzliche Elektroden (also insgesamt fünf) sind in der Pentode enthalten: Mar 20, 2022 · Not the same in pentode mode though, so maybe thats why you usually only see UL/triode switches and not UL/triode/pentode ones. Sep 1, 2015 · Pentode operation is different and requires an additional power supply. There is no guarantee that UL operation is lower distortion vs triode, it depends on the tube and the where the UL tap is on the OPTs. I also have a Golden Tube Audio SE40 which uses three parallel 5881 (6L6) tubes per channel in triode mode to a Single End transformer. Jun 8, 2022 · A cheap and cheerful single ended pentode amp could be half of a basic experiment in current-driving a loudspeaker. Jan 17, 2007 · Most pentode/tetrode amps have cheap components and cheap output transformers. Pentode mode connects the screen to the power supply. I don't think the implementation was crude, I think it was simple and proper and conformed with everything I've read on the subject. Feb 14, 2021 · The McIntosh MC275 is a pure pentode circuit for either KT88 or 6550 tubes. Jan 14, 2005 · I gutted an Orange AD5, reused some parts (chassis, transformers, pots etc) and converted it to an EF86 single ended amp. Returning that by external means returns triode-like behaviour, BUT not the Miller capacitance, as G2 still exists and does it's intended function. 26. The triode wired amp is usually less expensive all things considered and gets very close to the pure triode in sound quality. – Damon Coffman Tube curious? Want to try a single-ended tube amp? Heard experts trash tube amps with "a lot of feedback" or extoll the virtues of amps without feedback? Wha A good deal of single ended pentode and triode circuits in RDH4 has been on preamps which have such high linearity at low levels that there is no need for complex balanced or PP designs. The rectifier is 5AR4 or 5U4G. A push pull 300b amp would have a similar flavor to a single ended 300b. Differences in sound with a lot of debate about which is better ~ triode or pentode. Can we use a triode? Yes, but a pentode makes a better current source and a better cathode follower than a triode. 0 Mar 9, 2020 · A triode can be used single ended (SET) or push-pull. Feb 19, 2023 · My Decware runs a Russian military version of the EL84, ie. Oct 21, 2006 · SET vs. The first listen after the change was in pentode mode. Sep 4, 2024 · For single ended, I generally prefer 5k primaries for Triode Wired pentode and beam power output tubes. It's a fairly powerful SE amp that works very well. Sep 6, 2005 · Both schematics are single-ended. It is a two stage amp that runs a pair of pentodes with direct feedback from the plate to the control grid to generate triode curves from a pentode. (some may prefer it some may not, which is fine and personal preference) Me personally I feel single ended ultra linear with a bit of the added local feedback is a fantastic circuit and may be my favorite amplifier design an performance. SET amps are known for the tone, timbre and are often associated with the SET magic. Class A SE EL34 is good for like 10 watts, you can easily do that with a pair of 6v6 tubes using a much less filtered (read cheaper) power supply. Apr 2, 2004 · I believe that on a switchable pentode/triode amp, the switch enables or disables the 2 suppressor grids in or out of the tube circuit (hence the "triode" operation from an actual pentode tube). Without a Voltage on the Grid (0V) the current between Anode and Cathode will be maximum (saturation). The article compares eight different output tubes of low power in Single Ended (SE) mode, both triode and pentode, for compatibility with classical and jazz music listening using Lowther high-efficiency drivers in Teresonic speakers. The parts and topology of a tube amplifier is a system, with either Positive Synergy, or with Negative Synergy. Feb 4, 2003 · SET is an abbreviation for Single Ended Triode. Here there is the Pure Single Ended design and a direct heating tube is used. As a note, I did try an SRPP output stage with a 6AS7 tube and it was highly unstable. Dec 10, 2019 · I say the better option is to go for a triode-wired pentode, or cathde type triode. Pentodes are ideal for those who want maximum clarity and detail in their sound. The current through the valve (from anode to cathode) can be controlled by applying a varying voltage on the grid. Hardly anyone in 1955 thought that real hi-fi could be had from a single ended power design design. Jul 4, 2010 · Well VERY generally-Single ended triodes are the most linear amplifying device ever made by man. Pentoden sind leistungsfähiger als Trioden. RE: Single ended pentode: UL vs triode connection - Paul Joppa 23:11:38 03/26/14 (0) RE: Single ended pentode: UL vs triode connection - Caucasian Blackplate 21:59:29 03/26/14 ( 0) RE: Single ended pentode: UL vs triode connection, posted on March 26, 2014 at 21:59:29 Because they're pleasant-sounding distortion machines! I've been trying to figure out why single-ended triode (SET) tube amps sound so good and why people li Nov 12, 2013 · The LEGEND SE is a classic Single Ended tube amplifier using one of the all time greats, the EL84 pentode power tube. I am not even using any feedback in the circuit. (8w at 15% vs. The amp has these great things but at the same time lacks bass energy. Alternatively, I have had amps in the past and found that the Triode circuit would sound great and although it delivered more power, pentode/tetrode would sound muddy. DANGER! HIGH VOLTAGE! /*! elementor - v3. this tube is indirect heating and MFg on 1939 very old tube. Tone is Different. Otherwise all you get is opinion, which sometimes is meaningless. However, again I prefer Triode for that genre as well. Single ended triode amplifiers are prone to another issue. One of my amps is the little Glow Amp that uses 1 EL84 per channel. A triode is a vaccum tube with three active elements: anode, cathode and in between them a grid. Apr 9, 2024 · Choosing between triode and pentode The choice between triode and pentode depends largely on sound preference and the purpose of the amplifier. Now I have a BAT amp which is only triode and lacks nothing in drive. There are also single-ended tetrode , beam tetrode /beam power tube/kinkless tetrode , and pentode amplifiers with the same functionality and similar circuitry; e. Try reading the manufacturers specification sheet. Their strengths are in the fantastic realism they can impart,especially to the midrange and top,unbeatable if done right IMO. By Heideana October 21, 2006 in Technical/Restorations. ) if do you have a good efficient speakers( like a over 91dB/m/w),you may use a 2A3SE(6B4G). The screen is connected to a tap on the output transformer. The ultra linear arrangement applied to both a single-ended and a push-pull stage. The amplifier achieves good power output and low distortion by employing “E-linear” feedback in the output stage. Over Christmas, my best friend, who is a professional guitar player, came over. Then there is single ended triode amps,great for jazz and some blues but horrable for Rock. The Mullard version will use the pentode configuration. Jun 26, 2015 · A pentode will behave like a pentode as will a tetrode and so will a pentode wired as a triode. g. -V on the Grid will reduce the current between Anode and Cathode K. This article was published in audioXpress, April 2005. This amplifier has an operation mode SW at the top panel so that users can easily enjoy the sound difference in 2 different modes, UL (Ultra Linear) and Triode modes. His patent drawing clearly shows a single-ended design that demonstrates the concept in its most fundamental form: a vacuum tube that is neither triode-connected nor pentode-connected. 0 - 22-12-2024 */ :root{--e-a-color-white:#fff;--e-a-color-black:#000;--e-a-color-logo:#fff;--e-a-color-primary:#f3bafd;--e-a-color-primary-bold Jul 6, 2016 · IME the Inspire single-ended-pentode amp is more finicky about speaker synergy than a push/pull (PP) tube amp, or solid state. I run it through a 2x12 Celestion Blue/Gold or through the original AD5-speaker. I currently opperate the '34s in Triode Mode with a Hammond 125CSE The issue comes when I shop. It uses a single pentode as the driver (a 12HG7 video amp tube), and a solid-state power supply with a microprocessor controller. Picking the right pentode for the amp and the sound you want may move you closer to your perfect sound than strapping pentodes. Mar 2, 2012 · There have been many comments online advising against operating a pentode with Vp much less than Vg2, yet on the data sheet curves posted below for example, one of the most linear operating points is with Vg2=250V and Vp=162. Mar 23, 2022 · Not all pentodes like to be triode strapped. Triode Mode SET vs. There are three basic topologies commonly used for pentode power stages; Pentode, “Ultra Linear”, and Triode. They can be perceived as being weaker and more wooly in the bass than a pentode,but I think this more often than not is down to poor implementation and/or too inefficient Mar 23, 2022 · 3. But millions of amplifiers Aug 15, 2015 · So it's really "triode mode" vs "ultralinear mode". A single ended (1 tube per/ch) EL84 is @ 2 watts triode and @ 5 watts pentode. The feedback to the 2 screens from the output stage is effectively switched on or off. Although popular with tube amplifier manufacturers because of the higher power output it yields, Ultra-linear mode does not command a large avid following the way that triodes do. 63% 2nd harmonic distortion. With single ended triode, even this small power I get BEAUTIFUL, really GREAT soundstage and things like vocals, timbre, image are great. But what about sound qualitties ? Any one can share his experience having made side by side comparaison? I have a single ended triode Decware SE84C+ and a single ended penthode Niteshade Audio SE-10. The next set of spectrograms were measured by Harry F. Dec 28, 2010 · 1. May 20, 2010 · Triode. UL has far more deep thump but is still more defined than a normal pentode push pull. For output power levels up to about 3 W, the EL84 or 6V6GT are suitable choices. 3w at < 2%) Looks very promising for sure! Dec 20, 2022 · Using only one power tube in an amplifier is known as ‘single-ended’ operation and examples of single-ended amps include the Fender Champ (as pictured, opposite), Vibro Champ and tweed Princeton, the Vox AC4 and the Carr Mercury. By simply changing the power mode, 6V6, 6L6/EL34 and most of the KT series tubes can be used. One thing that can make the amp sound dead is if there is not enough power. For lower-powered pushpull pentode/tetrode tube amps, I tend to like 6L6, KT66, and EL84, and EL34 tube types the most. The EL34 pentode tube was introduced in 1949 by Philips the parent company of Mullard and, although no longer made by them, it is manufactured by JJ Electronic, Shuguang, Svetlana and Reflektor (Sovtek, Electro-Harmonix, Tung-Sol), amongst others. In Pentode it puts out 60 watts per channel and 30 watts in Triode. Why strap to triode when, to me, pentode UL with tapped OPT sounds so good and with good control. Tom Schlangen – ETF 06 Pentodes connected as Triodes 27 „ECC88 section on steroids!“ Apr 12, 2005 · Triode mode, electrically and physically, turns a tetrode or pentode into a triode by connecting the screen to the plate. Input drives through a Class A dual triode 12AT7/AY7 allowing a very simple coupling path with minimal capacitance. It is operating somewhere in between. This tube is known to be prone to runaway however. A 300B amp is only a 300B amp. 6. Jul 20, 2017 · Single Ended Triode (SET) vs Pentode vs Push-Pull: As the name suggests, SET amps are single ended in topology and use triodes. Pentode output is also supposed to be less sensitive to load, have better phase response, and feedback works better. With the improvement in the quality of gramophone recordings and radio broadcasts following the end of the war, and the development of the new ‘beam tetrode’ as a replacement for the output pentode valve, the simple ‘single-ended’ triode or pentode output stage was replaced by push–pull output stages. Nov 20, 2011 · One of the most interesting trends in high-end audio over the past 25 years has been the return of the single-ended triode power amplifier. Some firms make a related tube called an E34L which is rated to require a higher grid bias voltage Jan 15, 2018 · Complexity vs power. Love SE pentode with EL84 valves. Using the data from Table 6. I have heard for larger and more complex recording that Pentode is the way to go. Jan 24, 2019 · I'm assembling a small Chinese integrated amp kit using 6n2 and single ended 6p1 tubes (with silicon bridge rectifier). Some sort of a seven pin single triode driving a 6AQ5, with a 6X4 rectifier tube, or a SS bridge power supply. No prices for guessing which is best . Share More sharing options Followers 0. Oct 31, 2020 · I've also heard only great things about Elekit amps and the building experience, but there wasn't much impressions out there for their relatively new-ish amp TU8800, their singled-ended pentode amp with a f**k ton of tube rolling options (both blessing and a curse I guess) due to various power mode and two connection modes (Triode and and drawbacks of both single ended and push pull op-eration, lay them out side-by-side, and try to avoid rais-ing the ire of both Camp Push Pull and Camp Single Ended along the way. 560 volts cathode bias in tetrode mode wants a 9k load. Because it is single-ended, there is no need to use a phase inverter. 6W output (experience shows 4 to 5W is realistic It's been almost exactly 2 years since I previewed and then reviewed the original version of the Almarro A205A EL84 single-ended-pentode (SEP) integrated amplifier here at the moons back in 2004. Conclusion In this example I will use an EL84 because they're commonly used in single-ended guitar amps, and I happen to like it EL84s. your 7. Hummm hard to say. Dec 1, 2008 · UL is generally a flatter, cleaner and wider frequency presentation then triode. There are some pentode hifi amps but not many. Oct 19, 2022 · For single-ended triode-mode power output up to about 5 watts, the EL34 or 6L6GC is a good choice. On positive excursions as the drain current increases it progressively follows the gate voltage more accurately (up to a certain limit anyway) and so our sinewave gets a pointy top. Aug 17, 2023 · Triode wired amps can be very very good under the same restrictions. Oct 27, 2024 · Interesting that UL operation gets almost as much power as straight single ended pentode mode as the tube manuals state but with very low distortion. The triode section has a amplification factor of 70, and this valve was much used in record players with crystal pickups. I don't believe the switch option provides a fair comparison. A pentode can used single ended or pushpull as well, and can be connected as a pentode, or a triode, or ultra-linear in both single ended or pushpull configurations. from Single Ended Amplifiers with high effency speakers from 88dB/m to 100dB/m. I incorporated Merlin's triode/pentode morph. True, the triode mode rp "uses up" some of the power that would otherwise go to the load. Pretty much a 6V6 in a seven pin bottle. The ultra-linear or distributed load method of operating a push-pull output stage in an audio amplifier has been known for some years now, and was first employed in a commercially produced amplifier just after the war. 3. Feb 22, 2024 · The article about Audio Note's Octive Jubilee Push-Pull SE Mono amp was in the 8/22 Stereophile edition. As such they are unimpressive. Actually, SE amplifiers Keine Regel ohne Ausnahme, wie die sehr beliebt gewordenen Single-Ended-Trioden-Verstärker beweisen: Häufig besitzen die SETs nur wenige Watt, werden aber von vielen als klanglich überlegen gehandelt. The first schematic shows the tube connected in ultralinear mode. The One Electron UBT-2 seems to be the Gold Standard for this purpose, opperates in UL, Pentode, or Triode with no problem at all. I find triode operation much more natural sounding, but this may not be the case with all amps. KT88 is a beam tetrode, so technically speaking it will never run in pentode mode. By using cathode bias for the output tube, you don’t need to worry about a separate power supply for the bias. Jul 25, 2018 · This simple single-ended amp project by Pete Millett is a great performer and a very well documented project that was immediately adopted by many DIY'er's. or Penthode but wired Triode. A nice 6V6 triode will get you 90% of the way to a 45's sound with an easier to use cathode. The Spud amp kit comes supplied with GE 6CL6 tubes, also a type of high bandwidth video tube, but these are pentodes. :^) How SE Works Single ended means just that. Jan 22, 2011 · Search titles only By: Search Advanced search… Feb 14, 2021 · FWIW if ultra-linear is set up correctly, the result should be a pentode or tetrode power tube operating with the same linearity as a triode but with about 90% of the power it could make as a pentode or tetrode. The enhancement mode power JFETs do well in single-ended Class A applications and can take advantage of loadline cancellation. In single-ended operation, the power tube amplifies both the positive and negative phases of the audio waveform. Triode, tetrode and pentode are types of vacuum tubes. Parallel single ended (2 tubes per/ch) is @ 4 watts triode and @ 10 watts pentode. good for Jazz and small room Classic(Trio,Quartetto,etc. In other words, a Super-Triode design. The biggest disadvantage of a SET amp is the low output power. It's single ended. The first two are the only modes of operation that make sense when using a triode output tube. Jan 10, 2017 · For single ended, and a given current through the OPT primary, there is a limit to low distortion power output. Dec 5, 2013 · Yep, a pentode. Mar 24, 2018 · Hello guys, I will be buiding a single ended tube amp and I have three output tubes: EL84, 6P3S-E and old EL34. For lovers of vintage sound and soft, harmonic-rich music, triodes are the ideal choice. My Inspire “Fire Bottle” SE Stereo Tube Amplifier HO works great with my Klipsch RF-7 II (101dB, 8 ohm, 2 way). If you could find a Western Electric 91A amplifier today I would guess that you would have to pay well over $25k for it. ) Note that H. May 3, 2021 · UnSET is a Single Ended Triode design that is UN because it contains no Triodes. However, if you ever have the opportunity to hear an amp like an Art Audio Gill (single ended triode strapped EL34) or AudioNote 6550 SE (single ended tetrode) you'll forget any notion of pentode/tetrode being inferior. But then how many of us have heard a single-ended, directly heated pentode (e. A triode cannot be run in UltraLinear operation nor can it be connected in a Unity Coupled amplifier. F. 2. Single ended triode vs single ended penthode. After a week or so I changed it to include a switch so that I could run it in triode mode or pentode mode (my OPTs didn't have UL taps so I couldn't wire that in also). For pentode and beam tubes, Triode connection is accomplished by connecting the screen grid to the plate. This is where pentodes come in. Thomas designed circuit of 6SJ7 pentode in triode connection to drive KT66 or EL34. That is true for the pentode, ultra linear, and triode modes. ) A-5000 DHT monoblocks A-5000 DHT features Allnic In-house manufactured HL2 and RS242 triodes! Mar 12, 2014 · With Altec 19's I far prefer triode with KT-77's or EL34's (biased for single ended class A operation) with a little bit of feedback, but with Acoustat Spectra 22 ESLs I have to run the KT-88's and, though there is a bit less power to feed the hungry bastards, triode is smoother and better resolved with not much loss in dynamics. Single-ended triode amps and female vocals provide for me many an audiophile multi-orgasm! I have put my money where my mouth is and owned several stellar valve amps for decades now (mostly VTL models, then 211 monos, and Line Magnetic 845 now). 833), ultra-linear amplifier or a push-pull ultra-linear amplifier without feedback? for the past three months (at least) I have been debating buying a huge upgrade in my OPTS for my EL34 SE amplifier. It produced about 4. I understand the 6V6 is one but not sure of others. Feb 25, 2017 · One of the advantages of a single-ended amp is the low parts count, which means simplicity. You regain the plate resistance phenomenon (unique to triodes: pentodes, FETs and BJTs have no similar internal feedback mechanism and as a result have a constant-current output characteristic) by putting the plate's changing electric field immediately outside the grid, as Feb 26, 2021 · I noticed that Elekit also makes a single-ended amp kit utilizing the 6L6 tetrode tube (a personal favorite in type of tube) that looks interesting (I have not heard it). 1 (or any convenient 6L6 data sheet), the 6L6GC class A parameters are Nov 7, 2017 · After dabbling with EL84s (both pentode and triode), I finally found a promising output stage using a triode strapped EL34, fed from an EF86 driver stage. The 6AV5GA triode wired is very, very close to a 2A3/6B4G, and is also easier to implement. 1. Reply to this topic; Nov 2, 2017 · Triode was too soft and lacked dynamics even with my ESP speakers which present a tube friendly load. he said sounding is sound of direct-heating Third idea - Pure Single Ended. It turns out, however, that Alan Blumlein patented this invention more than a decade earlier. The primary difference between the three is how the pentode screen grid is driven. I love Triode for acoustical jazz and chamber music. 3WPC, so a direct comparison is fair enough. My amps give me lots of versatility in the output tubes used when a true triode is designed around a single type of tube. While no one claims the pure-triode, single-ended amplifier is "neutral" or "accurate", devotees of the genre describe in almost mystical terms the sonic attributes of these amplifiers. A good commercial example of this in a reasonably high end amplifier is the Audio Note OTO and OTO SE amplifiers. this Mullard design. He has formal training in classical and jazz as well as 'rock', and currenlty performs solo acoustic "new age" instrumentals. Some of the tube dudes here can probably be better at explaining Feb 10, 2008 · I built a single ended EL84 stereo amp wired in pentode mode.
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