This really is a performance test for the Schiit Saga pre-amplifier utilizing two various tubes.

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This really is a performance test for the Schiit Saga pre-amplifier utilizing two various tubes.

The system and additional pipes are on loan from sort member. Start to see the report about Schiit Saga in synchronous thread.<

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When I pointed out into the report on Saga, the stock pipe is just a Russian made clone of 6NS7 which passes label of 68HC. 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 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. 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 regarding the device overall but ideally this is certainly lost into the sound, pun intended.

Let us go into dimensions and view if our western, genuine 6SN7 provides on its vow.

Dimensions much like the review, I began my assessment by calculating performance stability that is warm-up

The very best two lines come from Raytheon 6SN plus the bottom two with 68HC. We come across that the Raytheon pipe really has greater distortion! We shall quantify that briefly.

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 discovered my LED light had been on. 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. Here it did, causing one channel to have a bit even even worse nevertheless the other a bit better! Once again, they are very small variations of no effect but shows exactly exactly how good our instrumentation is, as well as the known proven fact that some disturbance is stepping into the machine, perhaps coupling towards the tube it self.

Prior to getting in to the dashboard, this is how the stock 68HC did:

SINAD (signal over distortion and sound) is mostly about 97.5 dB. Here’s how the Raytheon pipe did:

We destroyed very nearly 4 dB in one single channel, and 2 dB within the other. This might be noticeable within the harmonic that is second peaks higher with all the Raytheon 6SN7.

Conclusions they do say don’t judge guide by its address and that’s real right here. The so named “clone” tube did a lot better than the manufacturer Raytheon. Needless to say Gamer dating apps difficult to tell exactly how much this correlates with a bigger test of pipes. For now however, the dimensions reveal one step backward so my suggestion to your owner will be maintain the Russian pipe and offer the Raytheon.

Ron Texas

Significant Contributor

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In all honesty. I assume 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 and every time I see “tube rolling” we think about a vehicle tube that is inner 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 is far better options for cathode supporters- the numbers of merit are mu and transconductance, and 6SN7 is kind of center of this road there. Its merit that is main is in a position to move reasonably big voltages, which will be not necessarily 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 ended up being opted for for any other than technical reasons.


Active Member

We’ll chime for the reason that I always comprehended “added sound” from the pipe become one thing “ideal” for a few people. While the sound or distortion of this 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 just one that enjoys. added sound beyond whats inherent to performance that is high and so I would likely suggest the stock. I additionally 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 thing that is bad. The included but less varied distortion for the Raytheon could be just what some individuals want within their system,

I might additionally 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 regarding 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 distinction is most likely reflective of “slightly different” production values for every single triode. Or it further reflects that production from both triodes inside the pipe is not a match that is perfect. The stock pipes production is much more consistent with the things I’d desire from the pipe in my very own system that is own’s maybe not definitely 100% but near sufficient since it’s such as for instance a 99.7% match. VS the other which will be around 98.4 and therefore difference that is small up to a 2DB SINAD distinction that I’m yes because of it self is not audible but had been going to amplify that single which will likely further enhance the “difference” eventually ensuing in a few tiny small undesired modifications

An we’ll further add that bother about most of these distinctions 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 with this is solely conjecture predicated on my subjective experience.