The system and additional pipes are on loan from sort member. Start to see the summary of Schiit Saga in parallel thread.<
When I talked about within the article on 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 ended up being manufactured in USA. They can be seen by you side-by-side here:
The 68HC is in the left as well as the Raytheon 6SN7 is from the right.
The pins on some oxidation was had by the 68HC on them. On the other hand the pins regarding the Raytheon 6SN7 were pretty clean.
I didn’t duplicate the dimensions of 68HC. I recently went some of the tests on 6SN7. Generally there be some variation in performance associated with device general but ideally this is certainly lost into the sound, pun intended.
Why don’t we enter into dimensions and discover if our western, genuine 6SN7 delivers on its vow.
Dimensions much like the review, we 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 will quantify that briefly.
In the side that is positive appears to be more stable with less deviation within the graph. Not too this matters much given the small variants at macro degree.
Through the dimension I knew my light that is LED was. It absolutely was in regards to a base over the Schiit Saga. I change it down during measurements but have never noticed it making a positive change prior to. Right right right Here it did, causing one channel to obtain a bit even worse however the other a bit better! Once again, they are very small variants of no effect but shows just fdating Coupon just how good our instrumentation is, plus the undeniable fact that some disturbance is stepping into the machine, maybe coupling towards the pipe it self.
Prior to getting to the dashboard, this is how the stock 68HC did:
SINAD (signal over distortion and noise) is approximately 97.5 dB. This is how the Raytheon pipe did:
We destroyed nearly 4 dB within one channel, and 2 dB within the other. It is noticeable when you look at the 2nd harmonic which peaks greater using the Raytheon 6SN7.
Conclusions they state don’t judge guide by its address and that’s real right 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 bigger test of pipes. For the time being however, the dimensions reveal one step backward so my suggestion to your owner would be to keep consitently the tube that is russian offer the Raytheon.
Ron Texas
Major Contributor
In all honesty. I assume this demonstrates tube rolling might have a result, however it helps you to have an AP readily available to assess the huge difference.
Meanwhile, everytime we see “tube rolling” we think of a vehicle tube that is inner down a hill to a river.
Hooked on Fun and Learning
Significant Contributor
Lowest distortion 6SN7 type i have tested had been a CV1988.
Nevertheless, there is much better alternatives for cathode supporters- the numbers of merit are mu and transconductance, and 6SN7 is kind of center regarding the road there. Its merit that is main is in a position to move averagely big 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 suitable. We suspect the 6SN7 had been opted for for other than technical reasons.
mshenay
Active Member
We’ll chime for the reason that I always comprehended “added noise” from the pipe become one thing “ideal” for a few people. Given that noise or distortion of this pipe is 2nd purchase harmonics which 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 just one that enjoys. added noise beyond whats inherent to performance that is high and so I would likely suggest the stock. In addition 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 included but less diverse distortion associated with the Raytheon might be just exactly just what many people want within their system,
I might additionally advise that when your buying [and evaluation] tubes your buying 100%/100% models, when I’ve found subjectively tubes run alone in a twin triode setup [so an individual 6SN7] which have a variation on 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” output values for every single triode. Or it further reflects that production from both triodes in the pipe is not a match that is perfect. The stock pipes production is more in accordance with the things I’d wish from the pipe in my very own own system, it’s maybe not positively 100% but near sufficient as it’s such as for instance a 99.7% match. VS one other which can be around 98.4 and that difference that is small up to a 2DB SINAD distinction that we’m yes because of it self is not audible but had been likely to amplify that single which will likely further enhance the “difference” fundamentally ensuing little minor undesirable modifications
An we’ll further add that worry about these kinds of distinctions is normally just legitimate in hybrid systems utilizing just one twin Channel Triode pipe, and it is feasible most of mentioned is complete and utter bull schiit, as again I’m no expect and all sorts of of this is solely speculation according to my subjective experience.