The system and additional pipes are on loan from kind member. Start to see the report about Schiit Saga in synchronous thread.<
When I pointed out within the overview of Saga, the stock pipe is just a Russian made clone of 6NS7 which passes label of 68HC. The additional pipe supplied is from Raytheon and ended up being built in United States Of America. You can see them side-by-side here:
The 68HC is in the left and also the Raytheon 6SN7 is from the right.
The pins on some oxidation was had by the 68HC 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 for the product overall but ideally that is lost into the sound, pun intended.
Why don’t we enter into dimensions to see if our western, genuine 6SN7 provides on its vow.
Dimensions much like the review, I began my evaluating by calculating warm-up performance security:
The very best two lines come from Raytheon 6SN plus the bottom two with 68HC. We come across that the Raytheon pipe really has greater distortion! We shall quantify that briefly.
In the good part performance appears to be more stable with less deviation within the graph. Not too this matters much given the small variants at macro degree.
Throughout the dimension I discovered my light that is LED was. It absolutely was about a foot over the Schiit Saga. I change it down during dimensions but have never noticed it making a positive change prior to. right right Here it did, causing one channel to have a little even worse however the other a bit better! Once again, they are very small variants of no effect but shows just just exactly how good our instrumentation is, as well as the known proven fact that some disturbance is engaging in the system, maybe coupling towards the pipe itself.
Prior to getting in to the dashboard, this is how the stock 68HC did:
SINAD (signal over distortion and sound) is approximately 97.5 dB. This is how the Raytheon pipe did:
We destroyed nearly 4 dB in one single channel, and 2 dB into the other. That is noticeable into the 2nd harmonic which peaks greater aided by the Raytheon 6SN7.
Conclusions they do say do not judge a written book by its address and that’s real right here. The so named “clone” tube did a lot better than the name brand Raytheon. Needless to say difficult to tell exactly how much this correlates with a much bigger test of tubes. For the time being however, the dimensions reveal a action backward so my recommendation into the owner is always to keep consitently the tube that is russian offer the Raytheon.
In all honesty. I suppose this demonstrates tube rolling might have a result, nonetheless it helps you to have an AP readily available to gauge the huge difference.
Meanwhile, each time we see “tube rolling” we think about a vehicle internal pipe rolling down a hill up to a river.
Dependent on Fun and Learning
Cheapest distortion 6SN7 type i have tested had been a CV1988.
However, there is better options for cathode followers- the numbers of merit are mu and transconductance, and 6SN7 is kind of center for the road there. Its merit that is main is able to move averagely 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 suitable. I suspect the 6SN7 had been plumped for for any other than technical reasons.
We’ll chime for the reason that I always comprehended noise that is”added from the tube become one thing “ideal” for a lot of. Since the sound 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. http://datingmentor.org/escort/fayetteville/ added sound beyond whats inherent to high end pipes thus I would likely suggest the stock. We additionally occur to like “russian” pipes my self anyways. My point being, that in my opinion in Tube Land included noise/distortion is not always a bad thing. The included but less diverse distortion for the Raytheon can be just just just what many people want within their system,
I might additionally advise that when your buying [and evaluating] pipes your buying 100%/100% models, when I’ve found subjectively tubes run alone in a double triode setup [so an individual 6SN7] which have a variation regarding the production values for every single triode often present a less exact stereo image consequently they aren’t as resolving often times. That 2dB SINAD reading distinction is most likely reflective of “somewhat different” output values triode. Or it further reflects that production from both triodes inside the pipe is not a match that is perfect. The stock pipes production is much more in accordance with the things I’d desire from the pipe in my system that is own’s perhaps not positively 100% but near sufficient since it’s such as for instance a 99.7% match. VS the other which will be around 98.4 and therefore difference that is small up to a 2DB SINAD huge difference that we’m yes because of it self is not audible but had been going to amplify that single which will likely further enhance the “difference” eventually resulting in a few little small unwelcome modifications
An we’ll further add that bother about most of these distinctions is generally just legitimate in hybrid systems utilizing an individual Dual Channel Triode pipe, feasible every one of mentioned is complete and bull that is utter, since again i am no expect and all sorts of of this is solely conjecture predicated on my subjective experience.