That is a performance test regarding the Schiit Saga pre-amplifier utilizing two tubes that are different.

That is a performance test regarding the Schiit Saga pre-amplifier utilizing two tubes that are different.

The system and extra pipes are on loan from sort user. Start to see the report on Schiit Saga in synchronous thread.<

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When I pointed out live escort reviews Fresno CA within the breakdown of Saga, the stock pipe is really a Russian made clone of 6NS7 which passes label of 68HC. The additional pipe supplied is from Raytheon and had been manufactured in United States Of America. You can view them side-by-side here:

The 68HC is from the left as well as the Raytheon 6SN7 is in the right.

The pins on the 68HC had some oxidation on them. In comparison the pins from the Raytheon 6SN7 were pretty clean.

I didn’t duplicate the dimensions of 68HC. I simply went some of the tests on 6SN7. Generally there be some variation in performance of this product general but hopefully this is certainly lost into the sound, pun intended.

Let us enter dimensions to check out if our western, genuine 6SN7 provides on its vow.

Dimensions much like the review, I began my screening by calculating performance stability that is warm-up

The most truly effective two lines come from Raytheon 6SN together with bottom two with 68HC. We come across that the Raytheon tube really has greater distortion! We shall quantify that soon.

In the good part performance is apparently more stable with less deviation into the graph. Perhaps not that this matters much given the variations that are tiny macro degree.

Through the dimension we discovered my Light-emitting Diode light had been on. It absolutely was about a base over the Schiit Saga. I transform it down during measurements but never have noticed it making a positive change prior to. Here it did, causing one channel to obtain a bit worse however the other a bit better! Once again, they are very small variants of no effect but shows exactly how good our instrumentation is, in addition to known proven fact that some interference is stepping into the system, possibly coupling into the pipe it self.

Prior to getting to the dashboard, here’s how the stock 68HC did:

SINAD (signal over distortion and sound) is mostly about 97.5 dB. Here’s how the Raytheon pipe did:

We destroyed very nearly 4 dB within one channel, and 2 dB when you look at the other. That is noticeable when you look at the 2nd harmonic which peaks greater using the Raytheon 6SN7.

Conclusions they state do not judge a written book by its address and that’s real here. The so named “clone” tube did much better than the brand Raytheon. Needless to say difficult to tell simply how much this correlates with a much bigger test of tubes. For the time being however, the dimensions reveal one step backward so my suggestion to the owner is always to keep carefully the tube that is russian offer the Raytheon.

Ron Texas

Significant Contributor

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In all honesty. I suppose this demonstrates tube rolling might have a result, however it helps you to have an AP readily available to gauge the distinction.

Meanwhile, each and every time we see “tube rolling” we think about a vehicle tube that is inner down a hill up to a river.

Dependent on Fun and Learning
Significant Contributor

Lowest distortion 6SN7 type i have tested had been a CV1988.

Nevertheless, there is definitely better options for cathode supporters- the numbers of merit are mu and transconductance, and 6SN7 is kind of center regarding the road there. Its primary merit has been in a position to move reasonably big voltages, that is certainly not appropriate in this application. High gm triodes like 6DJ8/6922 will outperform a 6SN7 in this ongoing solution, but they are unfortunately not pin appropriate. We suspect the 6SN7 had been selected for any other than technical reasons.

mshenay

Active Member

We’ll chime for the reason that I always comprehended noise that is”added from a tube become one thing “ideal” for a few people. Because the noise or distortion associated with the pipe is 2nd purchase harmonics that are “pleasant sounding”

Therefore if it’s equal included sound in each channel some may enjoy that incorporate distortion over a “cleaner” sounding tube

I am not just one that enjoys. added sound beyond whats inherent to high end pipes thus I would likely suggest the stock. In addition occur to like “russian” pipes my self anyways. My point being, that I think in Tube Land included noise/distortion is not constantly a bad thing. The additional but less distortion that is varied of Raytheon could be exactly just what many people want inside their system,

I would personally also advise that when your buying [and evaluating] pipes your buying 100%/100% models, when I’ve discovered subjectively tubes run alone in a triode that is dual [so an individual 6SN7] which have a variation in the production values for every single triode often provide a less accurate stereo image and are alson’t as resolving often times. That 2dB SINAD reading distinction is likely reflective of “somewhat different” production values triode. Or it further reflects that production from both triodes within the pipe is not a match that is perfect. The stock pipes production is more in accordance with the thing I’d wish from the pipe during my system that is own’s perhaps not positively 100% but near sufficient because it’s just like a 99.7% match. VS one other which will be around 98.4 and therefore tiny difference correlates up to a 2DB SINAD huge difference that I’m yes because of it self is not audible but had been planning to amplify that single which will likely further enhance the “difference” finally resulting in a few little small undesired modifications

An we’ll further add that bother about these kinds of distinctions just legitimate in hybrid systems making use of an individual double Channel Triode pipe, and it’s really feasible every one of mentioned is complete and bull that is utter, since again i am no expect with this is solely conjecture according to my subjective experience.