The machine and tubes that are extra on loan from sort member. Look at report on Schiit Saga in parallel 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 produced in United States Of America. You can view them 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. On the other hand the pins from 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 for the product overall but hopefully this is certainly lost within the sound, pun intended.
Why don’t we enter into measurements and discover if our western, genuine 6SN7 provides on its vow.
Measurements much like the review, I began my screening by calculating performance stability that is warm-up
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 shall quantify that briefly.
From the side that is positive appears to be more stable with less deviation within the graph. Perhaps not that this matters much given the small 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 switch it down during dimensions but never have noticed it making a positive change prior to. right Here it did, causing one channel to obtain a little even even worse nevertheless the other a bit better! Once again, they are very small variants of no effect but shows just just how good our instrumentation is, while the proven fact that some disturbance is stepping into the machine, maybe coupling to your pipe it self.
Before getting in to the dashboard, here’s how the stock 68HC did:
SINAD (signal over noise and distortion) is approximately 97.5 dB. This is how the Raytheon pipe did:
We destroyed very nearly 4 dB within one channel, and 2 dB into the other. This might be noticeable within the harmonic that is second peaks higher utilizing the Raytheon 6SN7.
Conclusions they state don’t judge book by its address and that’s true right right here. The so named “clone” tube did much better than the manufacturer Raytheon. Of course difficult to tell just how much this correlates with a much bigger test of pipes. For the time being however, the dimensions reveal one step backward so my suggestion to your owner would be to maintain the tube that is russian offer the Raytheon.
Ron Texas
Significant Contributor
In all honesty. I suppose this shows tube rolling might have a result, 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 had been a CV1988.
Nevertheless, there’s far better alternatives for cathode supporters- the numbers of merit are mu and transconductance, and 6SN7 is kind of center regarding the road there. Its primary merit will be able to move mildly big voltages, that will be not appropriate in this application. High gm triodes like 6DJ8/6922 will outperform a 6SN7 in this ongoing solution, but they are unfortunately not pin appropriate. We suspect the 6SN7 had been plumped for for any other than technical reasons.
mshenay
Active Member
We’ll chime for the reason that I always comprehended “added sound” from a pipe become one thing “ideal” for a lot of. Once the noise or distortion associated with the pipe is 2nd 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 high end pipes thus I would definitely suggest the stock. In addition happen to like “russian” pipes my self anyways. My point being, that i really believe in Tube Land included noise/distortion is not constantly a thing that is bad. The included but less varied distortion for the Raytheon can be just just exactly what many people want within their system,
I might also advise that when your buying [and evaluation] 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 single triode often provide a less accurate stereo image and they 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 in the pipe is not an amazing match. The stock pipes production is more in accordance with the things I’d desire from the tube in my own system that is own’s maybe not positively 100% but near sufficient because it’s such as a 99.7% match. VS one other which can be around 98.4 and therefore difference that is small up to a 2DB SINAD distinction that we’m certain because of it self is not audible but had been likely to amplify that single which will likely further enhance the “difference” eventually resulting in a few tiny minor undesired modifications
An we’ll further add that bother about most of these distinctions is normally just legitimate in hybrid systems utilizing just one double Channel Triode tube, and it’s really feasible every one of mentioned is complete and utter bull schiit, since again i am no expect and all sorts of for this is purely speculation predicated on my subjective experience.