2019年3月4日 · I solved the hum issue when using the flea power amp with my headphones. Increased the filter choke from 1H to 8H (same 300 ohm DCR) and both preamp filter capacitors from 10uF to 47uF. This eliminated the power supply ripple completely. Exchanged the 6sn7 with a new, less noisy set.

2021年1月22日 · 6SN7 has lower gain, than is normally used in a single-gain-stage SE amp. If you're willing to cascade both sections of a 6SN7 (two gain stages), then it can make a fantastic driver tube.

Check 220u/16v e-cap across 510 ohms resistor in cathode of 6sn7. If it's shorted or polarity reversed, the bias for both sections will be reduced. The cathode voltage should be about 1.2V, and the top 6sn7 bias around -5V and plate voltage should be around 190V.

2024年12月8日 · 6SN7是个在胆机发烧娱乐中使用几率较高，较受欢迎的管子。 参数相近的管子有；5692、ECC32、33、34、带帽的有6F8G、BL63、参数一致的还有B65、CV1988。 12V灯丝的有；12SN7、B36。 玩家必然比较其中乐趣。 请玩家谈谈各牌，各管的玩中差别供普通发烧友借鉴、认识。 看过几篇6SN7系列管的比较文章，由于涉及管子偏少所以发帖询问学习。 留个记号，晚上回来细说… 待兄细解。 在用老南京t级，100小时后入状态，比sg要好。 首先不敢以老 …

I have tried both driving a 2A3 PSE with individual half 6SN7-5687-6350 triodes + individual bias networks and then just like the Neiro. In most case there was no difference in terms of THD, IMD and sound. When there was a noticeable difference I found the latter was better!.

2007年5月24日 · 6SN7是目前音响用中μ值大8脚电压放大胆管中最常用的一种，是旁热式双三极，是目前常用的中μ值胆 (如12AU7，12BH7，5687等)中最流行的一种，内阻较低 (约7kΩ)，所以用途相对比较广泛，在国内外厂出胆机和土炮中经常看见它坚守在电压放大和推动的位置上，也常见用于后级放大器的输入级，相对而言用在前级放大器上就少一些。 6SN7在胆界算是举足轻重的了，至今已有60多年的生产历史了，因其生产持续时间较长，应用广泛，所以市场存货量丰 …

2006年3月23日 · I tend to think of the 12SN7 as an octal form of the 12AU7 - a high power low mu dual triode. I sometimes gig with an amp that uses a 6SN7 in Push-Pull as the output tube. I've also got an old EICO power amp that uses a 6SN7 for the phase inverter tube. Here is a look at the gig amp I mentioned above. It was created by my tube amp mentor ...

2021年12月23日 · There are plenty of examples of paraphase using 6sn7 and 12au7, to accomplish phase inversion with low distortion. One caution with many old paraphase designs, many were very simple and ment to drive 6v6 and 6l6, "EL" family can have enough of a grid current to upset the invertor tubes bias.

2019年7月9日 · The Williamson Circuit. The Williamson amplifier circuit was very popular through the 50s and 60s. It was developed in England and quickly adopted and adapted to American valves, er, tubes. The British version of the 6SN7 valve had slightly different characteristics than the American 6SN7 tube.

2007年9月29日 · 为了领略 6N7 P的魅力，笔者用 6N7 P组成双声道前级．采用1.5 V 电池作栅偏压．灯丝用直流供电。 6N7 P工作点电流在23mA，放音胆味浓郁．非常耐听。 本文为大家带来四个 分享。 ，有需要的都可以看看。 :在众多小型束射四极功率管和五极功率管当中， GT和EL84无疑是其中的佼佼者。 在电子管收音机时代，它们就广泛用于高档的收音机和扩音机中。 当时. 1. 部分 1是本机 部分的原理。 输入级兼电压 由OTK生产的 H14п担. 其中电压 管可用 N1代替，代 …

2019年12月19日 · After the 3 6SL7s I'm thinking about a 6SN7 for the phase inverter with a master volume following. I intend on using 4 KT88 power tubes for almost 200 watts of output power.

Signal input: 400 mV for max power. Outputs impedance: 4 – 8 ohm (other impedance available upon request). Frequency range: 15 – 35.000 Hz. Finish: Solid wood, several types of wood available, choose them here. Artisanal product made in Italy. Point to point built (NO pcb). 6550 in Single Ended Parallel for best sound quality.

2011年1月17日 · The 6SN7 has specs that are almost identical to 12AU7. Aside from one being octal and the other noval, they will interchange very well. 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.

2018年8月2日 · 搭配的MC300-PSE前级同样创意突出，使用特制的圆球状凸顶型6SN7做二级共阴极放大，贵族之声的300B做跟随阴极放大，具有输出阻抗小、输出电流大的优点。

These mono-blocks run by Transcendent GG line stage at 500 mV input sensitivity made an excellent match, significantly better compared to my previous Audio Research SP16L line stage - until I tried the 5687/7119/6N6P w.o.t. line stage.

2022年6月21日 · Are you saying you want to build a 2 stage amplifier, 6SN7 into 6V6 outputs? That's perfectly feasible. I just posted my circuit for 6SN7 into 2a3 in another thread and I've added it here. I can use 6SN7 or two single triodes like 6J5 variants. I used to like the 7193 but I'm getting better sound with the CV6 aka CV1135, VR-135.

2021年5月8日 · While looking to replace a pair of ShuGuang CV-181Z Treasures which have already gone microphonic after less than one year in the driver seat of my SP-14 preamp, I came across these very unusual looking PSVANE 6SN7-BE (blue) and 6SN7-SE (smoked) tubes which look like lightbulbs.

1. The document describes a 6SN7 SRPP pre-amplifier circuit with 6 tubes and various capacitors and resistors. 2. It includes a schematic diagram labeling the components and their connections in the circuit. 3. The circuit uses 6SN7 tubes to amplify audio signals passing through from the left and right input to the left and right output.

2024年12月18日 · With a maximum voltage gain of about 10 times with a single 6SN7 you will need a hefty input voltage to drive the 6B4G to full power at 45 Vrms at the control grid. This driver stage has about -a little more than- 23dB gain (a little more than x14 gain), so for 45V peek output requiring 3.14Vp input signal (2.22V RMS) ... but at not low distortion.

2024年12月27日 · Gain, internal resistance and slope are not that different, but perhaps the most important thing is that 6SN7 tubes give far lower distortion than 12AU7. Morgan Jones has a very OK and nice overview of these tubes in the book Vacuum Tube Amplifiers and his conclusion is clear: tubes in the 6SN7 class and equivalents are far better than 12AU7.