This is certainly a performance test regarding the Schiit Saga pre-amplifier using two different pipes.

This is certainly a performance test regarding the Schiit Saga pre-amplifier using two different pipes.

The system and extra pipes are on loan from type user. Start to see the breakdown of Schiit Saga in synchronous thread.<

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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 built in United States Of America. They can Fort Lauderdale backpage female escort be seen by you side-by-side here:

The 68HC is from the left as well as the Raytheon 6SN7 is from the right.

The pins on the 68HC had some oxidation on them. In comparison the pins from the Raytheon 6SN7 were pretty clean.

I didn’t duplicate the dimensions of 68HC. I simply went a number of the tests on 6SN7. So there be some variation in performance associated with product overall but ideally this is certainly lost into the sound, pun intended.

Let us go into dimensions to check out if our western, genuine 6SN7 provides on its vow.

Dimensions just like the review, we started my assessment by calculating warm-up performance stability:

The most effective 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.

In the good side performance is apparently more stable with less deviation within the graph. Maybe not that this matters much given the variations that are tiny macro degree.

Throughout the dimension we noticed my Light-emitting Diode light ended up being on. It had been of a base over the Schiit Saga. I transform it down during measurements but never have noticed it making a positive change prior to. Right right right Here it did, causing one channel to obtain a little even even even worse however the other a bit better! Once more, they are very small variants of no impact but shows just just exactly how good our instrumentation is, plus the undeniable fact that some disturbance is engaging in the unit, maybe coupling towards the pipe 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 within one channel, and 2 dB within the other. This might be noticeable into the harmonic that is second peaks greater with all the Raytheon 6SN7.

Conclusions they do say do not judge guide by its address which is real right 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 much bigger test of pipes. For the time being though, the dimensions reveal one step backward so my suggestion towards the owner would be to maintain the tube that is russian offer the Raytheon.

Ron Texas

Major Contributor

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In all honesty. I suppose this shows tube rolling might have a result, however it helps you to have an AP readily available to assess the huge difference.

Meanwhile, each and every time we 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.

However, there is definitely 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 certainly not relevant in this application. High gm triodes like 6DJ8/6922 will outperform a 6SN7 in this solution, but are unfortunately not pin suitable. I suspect the 6SN7 had been plumped for for other than technical reasons.


Active Member

We’ll chime for the reason that I always comprehended noise that is”added from a pipe to be one thing “ideal” for a few people. Once 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 noise beyond whats inherent to powerful tubes therefore 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 constantly a thing that is bad. The additional but less distortion that is varied of Raytheon could be exactly what some individuals want inside their system,

I would personally additionally advise that when your buying [and screening] pipes your buying 100%/100% models, when I’ve discovered subjectively tubes run alone in a double triode setup [so an individual 6SN7] which have a variation in the production values for each 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 single triode. Or it further reflects that production from both triodes within the pipe is not a match that is perfect. The stock pipes production is more consistent with the things I’d wish from the pipe in my own system, it’s perhaps not definitely 100% but near sufficient since it is such as for instance a 99.7% match. VS one other that is around 98.4 and that tiny difference correlates to a 2DB SINAD distinction that I’m certain because of it self is not audible but had been planning to amplify that single which will likely further enhance the “difference” finally ensuing tiny small unwelcome modifications

An we’ll further add that worry about most of these distinctions is generally only legitimate in hybrid systems utilizing an individual twin Channel Triode pipe, and it is 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 considering my subjective experience.