The machine and additional pipes are on loan from sort user. Look at report about Schiit Saga in synchronous thread.<
When I talked about within the post on Saga, the stock pipe is really a Russian made clone of 6NS7 which goes by label of 68HC. The additional pipe supplied is from Raytheon and ended up being built in United States Of America. They can be seen by you side-by-side here:
The 68HC is from 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 regarding the Raytheon 6SN7 were pretty clean.
I did not repeat the dimensions of 68HC. I recently went a number of the tests on 6SN7. Generally there be some variation in performance for the product general but ideally that is lost into the sound, pun intended.
Why don’t we go into dimensions and find out if our western, genuine 6SN7 provides on its vow.
Dimensions just like the review, we began my assessment by calculating warm-up performance security:
The most notable two lines come from Raytheon 6SN together with bottom two with 68HC. We come across that the Raytheon pipe really has greater distortion! We will quantify that soon.
In the good part performance is apparently more stable with less deviation within the graph. Not too this matters much given the variations that are tiny macro degree.
Through the dimension we knew my light that is LED was. It had been of a base over the Schiit Saga. I transform it down during dimensions but haven’t noticed it making a positive change prior to. Here it did, causing one channel to have a little even even even worse nevertheless 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 disturbance is stepping into the system, 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 sound) is all about 97.5 dB. This is how the Raytheon pipe did:
We destroyed nearly 4 dB in one single channel, and 2 dB within the other. It is noticeable into the harmonic that is second peaks greater because of the Raytheon 6SN7.
Conclusions they state do not judge a written guide by its address and that’s real right right here. The so named “clone” tube did much better than the name brand Raytheon. Needless to say difficult to tell just how much this correlates with a much bigger test of pipes. For the time being however, the measurements reveal one step backward so my suggestion into the owner would be to keep consitently the tube that is russian offer the Raytheon.
Ron Texas
Major Contributor
In all honesty. I assume this shows tube rolling might have an impact, however it really helps to have an AP readily available to assess the distinction.
Meanwhile, each and every time we see “tube rolling” we think about a vehicle tube that is inner down a hill to a river.
Dependent on Fun and Learning
Significant Contributor
Cheapest distortion 6SN7 type i have tested ended up being a CV1988.
Nevertheless, there is definitely better alternatives for cathode followers- the numbers of merit are mu and transconductance, and 6SN7 is kind of center associated with the road there. Its primary merit has been in a position to move reasonably big voltages, which will be certainly not 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 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 the pipe become one thing “ideal” for a lot of. Whilst the sound or distortion associated with the pipe is second 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 merely one that enjoys. added sound beyond whats inherent to performance that is high thus I would definitely 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 
I might additionally 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 triode often provide a less accurate stereo image and generally aren’t as resolving often times. That 2dB SINAD reading difference is most likely reflective of “somewhat different” production values triode. Or it further reflects that production from both triodes inside the pipe isn’t a match that is perfect. The stock pipes production is more in line with the things I’d wish from the pipe in my system that is own’s not positively 100% but near sufficient because it is such as for instance a 99.7% match. VS one other which can be around 98.4 and therefore difference that is small to a 2DB SINAD distinction that we’m certain because of it self is not audible but had been going to amplify that single which will likely further add to the “difference” finally resulting small minor undesirable modifications
An we’ll further add that bother about most of these differences is generally just legitimate in hybrid systems making use of just one double Channel Triode pipe, and it’s really feasible most of mentioned is complete and bull that is utter, since again i am no expect and all sorts of of this is solely conjecture according to my subjective experience.