6sn7 datasheet


  • Linlai™ Global Elite E-6SN7 Vacuum Tubes (pair or single)
  • Best Sounding 6SN7 Tubes – FAQ & Buyer’s Guide!
  • The 6SN7GT – the best general-purpose dual triode?
  • The 6SN7GT – the best general-purpose dual triode?
  • 6sn7 tube data Electron
  • Linlai™ Global Elite E-6SN7 Vacuum Tubes (pair or single)

    I would have remedied that lack myself except that my own capabilities to do spectral analysis were limited by the HP wave analyzer on hand reliable to perhaps dB or so , whereas Jones presented data down to dB, and third harmonic and higher products for 6SN7s tended to fall below dB.

    Note also that I have chosen not to use his mu follower plate load, opting instead for a solid-state cascode current source adjustable to the 8. The circuit is repeated for both triode sections. With a total of 8 bright red LEDs cheerfully glowing away during the test, my garage lab takes on a festive tone appropriate for the holiday season. The use of those horrid bits of bipolar silicon to form the CCS was rationalized by considering the need for separate heater supplies for the DUT and pentode, and the inconvenience and size associated with building the pentode loads.

    After all, this is a TEST jig, confined to my lab, and with no need to be allowed to foul the carpet of my living room. The parts used for the current source were carefully optimized through a resort to first principles: what parts are rattling around in the coffee cans I use as a junk box? The current sources were built, then 20Kohm dummy loads were attached to verify operation and facilitate adjustment to the 8. For the chosen current, the plate voltages settled in at about V for all tubes tested.

    The one hardware tweak involves levels and loading. Frustratingly, Audigy does not specify an input voltage range nor do they bother disclosing any information regarding input impedance. Nonetheless, it is safe to assume that the input impedance is too low to allow direct connection to the output of the test jig without severely perturbing the test. In order to circumvent these two issues, an interface box was constructed comprising a BUF high speed buffer the bandwidth, input impedance, and distortion safely orders of magnitude better than needed for this measurement and a BNC input with a 1Mohm resistor and 20pF capacitor strapped across it.

    Though the probe does alter the loading a bit 10Mohm, 10pF , such loading is pretty negligible compared with the much lower source resistance of the tube. There are quite a few nice software options, and my major criterion, as always, was minimal cost. Preferably free. In that impecunious spirit, I tapped the generous resources of Dazyweb Labs. When the interface box was inserted into the loop, the baseline was below dB using optimized level settings and signal averaging 16 samples per measurement.

    Though probably simple to more computer-literate folks, I spent quite a time diddling with various faders and gains to optimize the performance to this level. A calibrated analog oscilloscope was used to verify analog waveforms and levels. Putting the whole test setup in the loop and using a 1kHz sine wave as excitation, the baseline 2nd harmonic was at dB, 3rd harmonic at dB. Not too shabby performance by the test gear.

    This version had a shortened octal base, reminiscent of the old s. The GE versions both showed one better-than-average section and one worse-than-average section in one case, the worst 2nd HD of any section on test here , but with only two tubes, it is impossible to draw any conclusion.

    Section 1 was quite good; section 2 showed slightly higher THD, but a horrific distribution of harmonics, bad enough to warrant showing here: As a comparison, Jones showed an average for Russian 6J5s his choice for a driver tube for the Crystal Palace amplifier of dB for 2nd, dB for 3rd, and dB for 4th. Any mistakes are mine, not theirs.

    Best Sounding 6SN7 Tubes – FAQ & Buyer’s Guide!

    Since it is a gas tube, it needs to burn in before it performs as expected. Highs will be pushed to the limit, and the low-end will be almost non-existent — until around hours have elapsed. After that, the Sovtek 6SN7 gives a warm and mellow sound, with a pleasant low end and a smoothness throughout the entire range. Nonetheless, this tube is also prone to hissing.

    Again, this is a budget option, and there are better sounding tubes out there. I prefer it over the Electro-Harmonix. Can this tube replace 6h8c tubes?

    They are not compatible with one another. Who this is for? Budget-conscious persons looking to improve their sound. Why I like it? Sounds great for how cheap they are. Nowadays, the 6SN7 tubes are mainly used for the function they were originally designed for — audio amplification.

    They are utilized in tube amplifiers and preamps to increase the strength of the input signal. While doing so, they deform it, making the tone warmer and more vibrant. Besides being used in audio equipment, 6SN7 tubes were also incorporated in other electronics, such as televisions or computers. The 6SL7 and the 6SN7 are both octal dual-triode tubes. Even though the pins on the 6SL7 and the 6SN7 tubes line up, they are not interchangeable. The main variation between these two tubes is the gain factor.

    While the 6SN7 has a gain of 20, the 6SL7 has a gain of They also have different transconductances. Never exchange them If you prefer not to sacrifice sound quality. These properties make the 6SN7 family ideal for line-level uses. They work great in preamps since they preserve the signal with minimal distortion. Alternatively, 12AX7 tubes are best used for high gain. They are suitable for vinyl and other phono-stage use cases.

    Other tubes have evident handicaps and will never sound similar to a respectable one. Most tubes on this list have excellent sound. Again, sound preferences are personal, and there is no clear winner here.

    The 6SN7GT – the best general-purpose dual triode?

    The parts used for the current source were carefully optimized through a resort to first principles: what parts are rattling around in the coffee cans I use as a junk box? The current sources were built, then 20Kohm dummy loads were attached to verify operation and facilitate adjustment to the 8.

    For the chosen current, the plate voltages settled in at about V for all tubes tested. The one hardware tweak involves levels and loading. Frustratingly, Audigy does not specify an input voltage range nor do they bother disclosing any information regarding input impedance. Nonetheless, it is safe to assume that the input impedance is too low to allow direct connection to the output of the test jig without severely perturbing the test.

    In order to circumvent these two issues, an interface box was constructed comprising a BUF high speed buffer the bandwidth, input impedance, and distortion safely orders of magnitude better than needed for this measurement and a BNC input with a 1Mohm resistor and 20pF capacitor strapped across it. Though the probe does alter the loading a bit 10Mohm, 10pFsuch loading is pretty negligible compared with the much lower source resistance of the tube. There are quite a few nice software options, and my major criterion, as always, was minimal cost.

    Preferably free. In that impecunious spirit, I tapped the generous resources of Dazyweb Labs. When the interface box was inserted into the loop, the baseline was below dB using optimized level settings and signal averaging 16 samples per measurement.

    Though probably simple to more computer-literate folks, I spent quite a time diddling with various faders and gains to optimize the performance to this level.

    The large internal structure compared to miniature tubes contributes to its low distortion. The existence of many variants and many manufacturers of the 6SN7GT over the years gives lots of types to play with — each with its own sonic fingerprint. Audiophiles may have their own favorite dual triodes, ranging from exotic European types like the ECC40 to the rugged industrial types like the But the 6SN7GT is arguably the best general-purpose audio triode.

    The 6SN7GT – the best general-purpose dual triode?

    Its large octal format is more rugged and less prone to intermittent pin connections than miniature type. Its mu of 20 is a nice compromise between the old low-mu types and low-current high mu types.

    The plate resistance is low enough to drive choke or transformer loads. The 0. The fact that it is still manufactured and that there are still lots of N. To put the 6SN7GT into perspective, it does have some flaws. There is no shielding between sections, so unwanted interactions can occur. It is rather large, compared to miniatures.

    6sn7 tube data Electron

    But, no other tube combines so many good characteristics. Another predecessor, at least in nomenclature, was the 6N7, a dual triode intended for push-pull class-B operation. Most 6SN7GTs made through the early s had a graphite coating on the inside surface of the glass bulb.

    This served to drain excess accumulations of electrons that could affect the operation of the tube. Sylvania and Raytheon came out with a loctal version, called the 7N7, which, interestingly, was registered inwell before the 6SN7GT.

    Primarily due to the non-acceptance by RCA the Microsoft of its timethe loctal line, though technically superior to the octal types, withered away in the late s. Radar had many pulse-handling circuits where the low plate resistance and compact footprint of the 6SN7GT was ideal. The glut of war-surplus parts after the war included incredible numbers of 6SN7GTs. Just as the war wound-down, two brand-new industries became heavy users of dual triodes: electronic computers and television. Early televisions had up to six 6SN7GTs each.

    And, of course in audio applications, from movie theater amplifiers to mixing boards to P. By the end of the war, it became clear that the regular receiving tube construction and manufacturing procedures were inadequate for military use. The military wanted both ruggedness and high reliability, as well as tightly-controlled electrical characteristics.

    This had a stiffening rod added to the otherwise conventional structure. By the mids, most tube manufacturers made a 6SN7WGT type with the extra stiffening and often thicker micas, as well as a low-loss micanol base. The last versions were basically receiving tube construction that were tested and sorted to tighter specifications.


    thoughts on “6sn7 datasheet

    • 24.08.2021 at 15:39
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      Reply
    • 27.08.2021 at 00:57
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      Many thanks for an explanation, now I will not commit such error.

      Reply
    • 29.08.2021 at 12:47
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      I apologise, but it does not approach me. Who else, what can prompt?

      Reply

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