Low gain 6sn7 tubes A 6SN7 tube is medium gain (mu=20) that is more typically used for low level gain sections (line preamp) or as a buffer. Mar 19, 2014 · 'Doing the budget' for gain required, on the basis of input sensitivity, amount of GNFB likely to be operated and the output tube targets suggested a medium mu triode, and the 6SN7 is a good example. In tube mode, Lyr+ is very similar to Lyr 3, in fact. The VAC and the Super 6SN7 had superb imaging and staging, but I felt the Super 6SN7 excelled in detail retrieval, low-end punch, and authority. Simplicity and low tube count. I don't like putting CCSs in tube amplifiers unless they themselves are made with tubes. The Ray Tubes 6SN7 RESERVE Vacuum Tube delivers a profound, lifelike audio experience with smooth vocals, balanced treble, and commanding low-end, tailored specifically for audiophile systems. Be careful of selecting high gain without turning down the volume first—high gain is high! it’s off, then it’s running tube gain. Nov 14, 2015 · I now suspect that the hum issue might be due to too high gain in the preamp. Jan 21, 2025 · This stage would be outside the normal feedback loop and ideally have a low gain, like 5. CCS plate load. . I'm glad it works rather well! Never swap them for anything else. Jul 14, 2018 · The new Lyr 3 from Schiit uses this tube type in a hybrid gain stage. Plenty of inputs, . Example: 1V input -> 30V gain in driver stage -> EL34 output stage -> 10. 300B. What is the best way to lower the gain in the preamp? Change the 6SN7 tubes to tubes with lower gain? Which ones in that case? Apr 30, 2021 · I plan to use just two tubes, one for each channel. My favorite tubes for the Lyr 3, are vintage 6F8G, which require an adapter. Which means you can roll tubes, and expect the tube rolling to result in the same sonic changes that you would have expected, say, on Lyr 3. The 6SN7 tube is easy to design for, as it is difficult to achieve an overly bright sound because of its limited frequency response. I'm in the camp that 6SN7 doesn't have enough gain to properly drive the 300B. The US Department of Defense used 6SN7 tubes by the truckload and had special versions made. In the event that you do not want to compromise on sound quality. The 12AX7 tubes are the inverse of this: they have a high output impedance, but they have a high gain and a low current. Be careful of selecting high gain without turning down the volume first—high gain is high! Experience unparalleled audio clarity with Ray Vacuum Tubes, meticulously hand-selected and tested for the ultimate sound quality. Oct 5, 2020 · Over the time playing with tube amplifiers, I accumulated some number of various tube to allow me play “tube rolling” game. Hardest to design (and sound good). Great sound, . Apr 24, 2016 · I want to reduce the preamp gain without having a gain knob, like on a guitar amp. 7mm, vs 32mm for a standard tube. 7 ma range. 5 ma per triode and actually works best in the 0. 7 * 20 = 54 V P-P at the plate -BUT this gets divided down- the plate resistance and the plate load resistance act as a voltage divider. 5V output. Ease of integration regarding Impedance interaction between Jul 16, 2013 · Generally, the noise and microphony of the 6SN7 tube are low making this tube suitable in preamps as well as power amp driver stages and most competent audio designers would use it in place of a 12AU7 / ECC82 tube in almost every application. Sep 8, 2022 · I like the look, but only if one uses stock 6SN7 tubes. The total gain will be 1V input -> 10V gain with 6CG7 -> EL34 output stage -> 3. Dec 4, 2009 · Here's my first-order understanding of the solution: The mu of a 6SN7 is 20, so that's the maximum gain possible. These features make it decent low gain preamp tube, but it can really excel as an output tube due to both of these features. I decided to try scientific approach and measure tube parameters, which may influence perceived sound of the amplifier. Summarizing topology choices discussed so far: 1. Whats on my mind right now is a cathode follower topology but doing some research i found out there are a few takes on this so my question to the hive mind is which would you recommend and why? Mar 22, 2010 · My 300B amp is designed with 6SN7 driver (and 5U4G rectifier). It would feed the volume control and the 6U8A pentode, which would be inside the feedback loop. Inverted output. 6SN7 tubes have a low output impedance and a low gain, however they have a high current and a low gain. Feb 9, 2012 · The 6SN7 is a great choice as low gain tubes make for a super quiet line stage. As we all know 6SN7 is a double triode and for my design I will tie the two sections in parallel. I’m thinking of getting one with the Multibit DAC card to replace my HRT DAC, my Schiit Asgard, my Sys (which is acting in reverse as a source input switch), and to perform as a preamp for an eventual two-channel system with a power amp. Jan 17, 2011 · The big differences are 1) 6SN7 has a maximum plate voltage of 450, which is well over the 12AU7, and 2) the physical plate size is comparatively enormous. it’s off, then it’s running tube gain. 12AU7 or 6SN7 frontend, 300B output, both tubes wired in common cathode mode. Nov 22, 2009 · Consider the 6CG7/6SN7 (gain of 10) as the driver stage. Mar 27, 2017 · The gain of a tube stage *hardly* changes with supply voltage. -so if you apply 2. Compatible with a range of high-end amps, each tube ensures low noise, minimal microphonics, and superior longevity Aug 12, 2017 · The 6SN7 cathode follower would be adding very little not already provided by the 300B stage, I think. Push this button to toggle between low and high gain modes. Gain is 14 for B+ of 90V, 180V, or 300V. I experimented with two major types of low signal tubes: 6SL7 and 6SN7. Dual stage. My Lyr 3 demanded a “socket save” to accommodate the tennis ball. 3 days ago · The 6SL7 is a high gain low current amplifier and the 6SN7 is a rather low gain higher current tube. Among others, I am looking at some mid-1940s NOS Sylvania tubes -- VT231/6SN7GT from 1944 and 1945. I would prefer doing this without modifying the circuit too much, and just change the preamp tubes, but if anyone has any good suggestions on how to do, here it is: Dec 16, 2024 · Experience the warmth and clarity of vacuum tube sound with the Ray 6SN7 Select, a hand-selected and rigorously tested tube chosen by audiophiles, for audiophiles. No feedback. 2. To match your F5, the driver stage needs a gain of 30. The same may be said for adapted tubes. I have a friend who is an absolute genius when it comes to tube and solid state audio. The 6SN7 can handle 25 ma per triode and seems to work best in the 8-12 ma range. Over the last few decades he has built some incredible sounding line stages using tubes in combination like the 12AU7,5751,12AX7 and other 9 pin tubes. Has anyone used these tubes before? 3 days ago · The 6SL7 is a high gain low current amplifier and the 6SN7 is a rather low gain higher current tube. Only 5% of the tubes commissioned for production meet our standards for gain and conductance matching; 12-month warranty against manufacturing defects . The 6SL7 can only handle 2. Remember, you can’t run tube gain without a tube! 5 Gain Select. Single stage. Longevity, . The gain in the preamp is 19 dB. Crafted to surpass the unpredictable quality of New Old Stock, this brand-new tube combines the best of traditional materials with See full list on sonoboom. 5V into 8 Ohms (5 Watts). I felt the VAC had a slightly more “you are there” type of quality, especially on piano, but I felt that the Super 6SN7 did a better job of replicating hall sounds on some orchestral selections . Ideal for audiophiles, these tubes offer exceptional dynamics, clarity, and a spacious soundstage, setting a new standard in vacuum tube technology. What low B+ does is give less output for the same distortion or more distortion for the same output. Hi everyone, I’m planning a new build for a tube buffer and i want to do something with unity gain and 6SN7 tubes. 7V P-P to the grid, you'll see 2. The noise and gain characteristics do change between solid state and tube. Look at the top line in my attachment. The main design parameters fall into three points – low-distortion, low-gain and low output impedance without using a output buffer/cathode follower. Ease of use, . The light to the right of this button will glow when Lyr+ is in high gain mode. If one uses variants, say a PSVane 6SN7 SE (tennis ball), the base is ~34. Nov 29, 2024 · I am interested in rolling the 6SN7 tubes in my Aric Audio line stage. When I connect a Chord Mojo DAC directly to the power amp it is dead silent. When you’re running tube gain, you’re running 100% tube gain. This isn't enough gain. Even with far higher loading values, gain only changes from 14 to 16, hardly over 1dB thus hardly audible. So, what do we need in a good preamp? . For the OPT, I'm thinking something like an Edcor GXPP 10K-8. Oct 19, 2006 · 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. I'm currently rolling 6F8G driver with good results. 5 to 0. In order to achieve some of these goals I Jul 13, 2014 · Hi, I'm Santa and this thread will serve to document the build of my next preamplifier. com Dec 15, 2012 · the 12AX7 is a high gain (mu=100) tube that is typically used within a phonostage since you need the gain to amplify the low level signal from a phono cartridge. hnrit jbehcf plth rgpsy eyd xkdxco yqjaas ozkm iisxco bdks