The machine and tubes that are extra on loan from sort user. Start to see the post on Schiit Saga in synchronous thread.<
The stock tube is a Russian made clone of 6NS7 which goes by label of 68HC as i mentioned in the review of saga. The additional pipe supplied is from Raytheon and ended up being built in United States Of America. You can view them side-by-side here:
The 68HC is in 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 associated with the product general but hopefully that is lost within the sound, pun intended.
Let’s get into measurements and view if our western, genuine 6SN7 provides on its vow.
Measurements just like the review, I began my assessment by calculating warm-up performance security:
The most effective two lines come from Raytheon 6SN in addition to bottom two with 68HC. We come across that the Raytheon pipe really has greater distortion! We shall quantify that briefly.
Regarding the side that is positive is apparently more stable with less deviation into the graph. Maybe not that this matters much given the variations that are tiny macro degree.
Through the dimension we recognized my light that is LED was. It had been of a base over the Schiit Saga. I change it down during dimensions but have never noticed it making a positive change prior to. right Here it did, causing one channel to obtain a bit even even worse however the other a bit better! Once more, they are very small variants of no impact but shows just just just how good our instrumentation is, plus the known undeniable fact that some disturbance is engaging in the machine, maybe coupling into the pipe itself.
Prior to getting in to the dashboard, this is how the stock 68HC did:
SINAD (signal over noise and distortion) is mostly about 97.5 dB. Here’s how the Raytheon pipe did:
We destroyed very nearly 4 dB in a single channel, and 2 dB within the other. It is noticeable within the 2nd harmonic which peaks higher utilizing the Raytheon 6SN7.
Conclusions they state do not judge book by its address which is real right here. The so named “clone” tube did a lot better than the brand name Raytheon. Of course difficult to tell simply how much this correlates with a bigger test of pipes. For the time being however, the dimensions reveal one step backward so my suggestion into the owner would be to maintain the Russian pipe and offer the Raytheon.
Ron Texas
Significant Contributor
Truth be told. I assume this shows tube rolling might have an impact, nonetheless it really helps to have an AP readily available to gauge the distinction.
Meanwhile, each time we see “tube rolling” we think about a vehicle internal pipe rolling down a hill to a river.
Hooked on Fun and Learning
Significant Contributor
Cheapest distortion 6SN7 type i have tested fitness dating had been a CV1988.
However, there is definitely better options for cathode followers- the figures 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 swing averagely large voltages, that will be not necessarily appropriate in this application. High gm triodes like 6DJ8/6922 will outperform a 6SN7 in this solution, but they are unfortunately not pin appropriate. We suspect the 6SN7 ended up being opted for for other than technical reasons.
mshenay
Active Member
I’ll chime for the reason that I always comprehended “added sound” from a pipe become something “ideal” for a few people. Given that sound or distortion for the pipe is 2nd purchase harmonics that are “pleasant sounding”
Therefore if it’s equal included noise in each channel some may enjoy that incorporate distortion over a “cleaner” sounding tube
I am not merely one that enjoys. added noise beyond whats inherent to powerful pipes and so I would likely suggest the stock. We additionally occur to like “russian” pipes my self anyways. My point being, that i really believe in Tube Land included noise/distortion is not constantly a bad thing. The added but less distortion that is varied of Raytheon might be just exactly exactly what some individuals want within their system,
I might additionally advise that when your buying [and assessment] tubes your buying 100%/100% models, when I’ve discovered subjectively tubes run alone in a twin triode setup [so an individual 6SN7] which have a variation regarding the output 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 most likely reflective of “somewhat different” production values triode. Or it further reflects that production from both triodes inside the pipe is not a perfect match. 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 close sufficient since it is such as a 99.7% match. VS one other which can be around 98.4 and that little difference correlates up to a 2DB SINAD distinction that we’m certain because of it self is not audible but had been planning to amplify that single which will likely further enhance the “difference” fundamentally ensuing little minor unwelcome modifications
An we’ll further add that bother about most of these distinctions is normally just valid in hybrid systems making use of a solitary twin Channel Triode pipe, and it’s really feasible every one of mentioned is complete and utter bull schiit, since again i am no expect for this is solely conjecture predicated on my subjective experience.