The system and extra pipes are on loan from type user. Look at article 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 produced in United States Of America. You can view them side-by-side here:
The 68HC is from the left in addition to Raytheon 6SN7 is in the right.
The pins on the 68HC had some oxidation on them. On the other hand the pins regarding the Raytheon 6SN7 were pretty clean.
I didn’t duplicate the dimensions of 68HC. I simply went a number of the tests on 6SN7. Generally there be some variation in performance associated with the device general but ideally that is lost into the sound, pun intended.
Let us go into measurements and discover if our western, genuine 6SN7 provides on its vow.
Dimensions just like the review, we began my evaluating by calculating warm-up performance security:
The very best 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 appears to be more stable with less deviation into the graph. Not too this matters much given the small variants at macro degree.
Throughout the dimension we understood my light that is LED was. It absolutely was of a base over the Schiit Saga. I switch it off during dimensions but haven’t noticed it making a positive change prior to. right Here it did, causing one channel to obtain a little even even worse however the other a bit better! Once more, they are very small variants of no effect but shows exactly just how good our instrumentation is, as well as the known proven fact that some disturbance is stepping into the machine, possibly coupling towards the tube it self.
Prior to getting in to the dashboard, here’s how the stock 68HC did:
SINAD (signal over noise and distortion) is mostly about 97.5 dB. This is how the Raytheon pipe did:
We lost nearly 4 dB in a single channel, and 2 dB when you look at the other. This might be noticeable within the harmonic that is second peaks greater aided by the Raytheon 6SN7.
Conclusions they state do not 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 just 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 will be keep carefully the tube that is russian offer the Raytheon.
Ron Texas
Significant Contributor
In all honesty. I suppose this shows tube rolling might have an impact, 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 tube that is inner down you can try here a hill up to a river.
Hooked on Fun and Learning
Significant Contributor
Cheapest distortion 6SN7 type i have tested had been a CV1988.
However, there is far better alternatives for cathode supporters- the numbers of merit are mu and transconductance, and 6SN7 is kind of center associated with the road there. Its merit that is main is in a position to move averagely large voltages, that will be certainly not appropriate in this application. High gm triodes like 6DJ8/6922 will outperform a 6SN7 in this solution, but are unfortunately not pin suitable. We suspect the 6SN7 had been 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 lot of. Since the sound or distortion associated with the pipe is 2nd purchase harmonics that are “pleasant sounding”
Therefore if it’s equal added 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 therefore I would definitely suggest the stock. In addition occur to like “russian” tubes my self anyways. My point being, that i really believe in Tube Land added noise/distortion is not always a thing that is bad. The additional but less distortion that is varied of Raytheon can be just just what many people want within their system,
I would personally 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 a single 6SN7] which have a variation in the production values for every triode often provide a less accurate stereo image and are usuallyn’t as resolving often times. That 2dB SINAD reading distinction is most likely reflective of “somewhat different” production values for every 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 much more consistent with what I’d wish from a pipe in my own own system, it’s maybe not absolutely 100% but near enough because it’s just like a 99.7% match. VS one other that will be around 98.4 and therefore little difference correlates to a 2DB SINAD huge difference that we’m yes because of it self is not audible but had been planning to amplify that single which will likely further enhance the “difference” fundamentally resulting in a few little small undesirable modifications
An we’ll further add that bother about most of these distinctions is generally just valid in hybrid systems making use of a single double Channel Triode pipe, and it is feasible all of mentioned is complete and bull that is utter, since again i am no expect with this is solely conjecture predicated on my subjective experience.