The system and additional pipes are on loan from sort user. Look at writeup 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 had been manufactured in United States Of America. You can view them side-by-side here:
The 68HC is regarding the left plus the Raytheon 6SN7 is in the right.
The pins on some oxidation was had by the 68HC on them. In comparison the pins in the Raytheon 6SN7 were pretty clean.
I didn’t duplicate the dimensions of 68HC. I recently went a number of the tests on 6SN7. Generally there be some variation in performance associated with the product general but ideally that is lost within the sound, pun intended.
Let us enter dimensions and discover if our western, genuine 6SN7 provides on its promise.
Dimensions much like the review, we began my screening by calculating performance stability that is warm-up
The most effective two lines come from Raytheon 6SN plus the bottom two with 68HC. We come across that the Raytheon pipe actually has higher distortion! We shall quantify that briefly.
Regarding the side that is positive appears to be more stable with less deviation into the graph. Not too this matters much given the tiny variants at macro degree.
Through the dimension we noticed my light that is LED was. It absolutely was about a base over the Schiit Saga. I transform it down during dimensions but have never noticed it making a positive change prior to. right right Here it did, causing one channel to obtain a little even worse however the other a bit better! Once again, they are very small variants of no effect but shows just exactly exactly how good our instrumentation is, in addition to proven fact that some interference is stepping into the machine, maybe coupling towards the pipe it self.
Prior to getting to the dashboard, here’s how the stock 68HC did:
SINAD (signal over noise and distortion) is all about 97.5 dB. This is how the Raytheon pipe did:
We destroyed very nearly 4 dB in a single channel, and 2 dB within the other. This is certainly noticeable within the 2nd harmonic which peaks higher using the Raytheon 6SN7.
Conclusions they state don’t judge a written guide by its cover which is true right here. The so named “clone” tube did a lot better than the name brand Raytheon. Needless to say 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 towards the owner is always to keep consitently the Russian pipe and offer the Raytheon.
Ron Texas
Significant Contributor
In all honesty. I suppose this demonstrates tube rolling might have a result, nonetheless it really helps to have an AP readily available to assess the huge difference.
Meanwhile, each and every time we see “tube rolling” we think about a vehicle internal pipe rolling down a hill up to a river.
Hooked on Fun and Learning
Significant Contributor
Cheapest distortion 6SN7 type i have tested had been a CV1988.
Nevertheless, there’s definitely better options for cathode supporters- the numbers of merit are mu and transconductance, and 6SN7 is kind of center associated with the road there. Its main merit has been in a position to move reasonably large voltages, that will be certainly not appropriate in this application. High gm triodes like 6DJ8/6922 will outperform a 6SN7 in this ongoing solution, but are unfortunately not pin compatible. We suspect the 6SN7 ended up being opted for for any other than technical reasons.
mshenay
Active Member
We’ll chime for the reason that I always comprehended noise that is”added from the pipe become one thing “ideal” for a few people. Given that sound or distortion of this pipe is 2nd order 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 definitely suggest the stock. We additionally occur to like “russian” tubes my self anyways. My point being, that I believe in Tube Land included noise/distortion is not constantly a bad thing. The additional but less distortion that is varied of Raytheon can be just just what many people want within their system,
I might additionally advise that when your buying [and assessment] pipes 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 production values https://datingmentor.org/escort/fort-wayne for every triode often provide a less exact stereo image and so aren’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 wish from the tube during my system that is own’s maybe not positively 100% but near sufficient since it is such as for instance a 99.7% match. VS the other which can be around 98.4 and that little difference correlates up to a 2DB SINAD distinction 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” eventually resulting in a few tiny minor unwelcome modifications
An we’ll further add that bother about most of these distinctions is normally only legitimate in hybrid systems utilizing an individual double Channel Triode pipe, and it’s really feasible every one of mentioned is complete and bull that is utter, as again i am no expect and all sorts of of this is solely conjecture predicated on my subjective experience.