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  • Posté par : groupeureka

This can be a performance test associated with the Schiit Saga pre-amplifier utilizing two tubes that are different.

The system and tubes that are extra on loan from type member. Begin to see the overview of Schiit Saga in parallel thread.<

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When I pointed out into the breakdown of Saga, the stock pipe is really a Russian made clone of 6NS7 which passes label of 68HC. The additional tube supplied is from Raytheon and ended up being built 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 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 recently went some of the tests on 6SN7. Generally 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 and discover if our western, genuine 6SN7 provides on its vow.

Dimensions much like the review, we began my evaluating by calculating warm-up performance security:

The most truly effective two lines are from Raytheon 6SN together with bottom two with 68HC. We come across that the Raytheon pipe really has greater distortion! We shall quantify that soon.

In the good part performance seems to be more stable with less deviation into the graph. Perhaps not that this matters much given the variations that are tiny macro degree.

Through the www.datingmentor.org/gamer-dating/ dimension we recognized my light that is LED was. It absolutely was of a base over the Schiit Saga. I switch it down during dimensions but never have noticed it making a positive change prior to. right right Here it did, causing one channel to have a bit even even worse however the other a bit better! Once more, they are very small variants of no effect but shows just just just how good our instrumentation is, as well as the proven fact that some disturbance is engaging in the machine, possibly coupling to your pipe it self.

Prior to getting in to the dashboard, this is 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 nearly 4 dB in a single channel, and 2 dB when you look at the other. That is noticeable when you look at the harmonic that is second peaks greater because of the Raytheon 6SN7.

Conclusions they state do not judge a written guide by its address which is real right right here. The so named « clone » tube did much better than the manufacturer Raytheon. Needless to say difficult to tell exactly 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 consitently the tube that is russian offer the Raytheon.

Ron Texas

Significant Contributor

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In all honesty. I guess this demonstrates tube rolling might have a result, however it helps have an AP on hand to assess the huge difference.

Meanwhile, everytime we see « tube rolling » I think about a vehicle tube that is inner down a hill up to a river.

Dependent 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 sort of center associated with the road there. Its merit that is main is in a position to move averagely big voltages, that is certainly not appropriate in this application. High gm triodes like 6DJ8/6922 will outperform a 6SN7 in this service, but they are unfortunately not pin suitable. We suspect the 6SN7 had been plumped for for other than technical reasons.

mshenay

Active Member

We’ll chime for the reason that I always comprehended noise that is »added from a pipe become one thing « ideal » for a lot of. Because 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 one that enjoys. added sound beyond whats inherent to performance that is high thus I would definitely suggest the stock. We also 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 varied distortion regarding the Raytheon could be just just what some individuals want within their system,

I might additionally advise that when your buying [and assessment] pipes your buying 100%/100% models, when I’ve discovered subjectively tubes run alone in a triode that is dual [so an individual 6SN7] that have a variation in the production values for every single triode often provide a less exact stereo image and they aren’t as resolving often times. That 2dB SINAD reading distinction is most likely reflective of « slightly different » output values for every single triode. Or it further reflects that production from both triodes in the pipe is not an amazing match. The stock pipes output is more in accordance with the thing I’d desire from the pipe within my own system, it’s maybe not positively 100% but near sufficient because it’s such as for instance a 99.7% match. VS the other that is around 98.4 and that little difference correlates up to a 2DB SINAD huge difference which I’m certain because of it self is not audible but had been likely to amplify that single which will likely further enhance the « difference » fundamentally ensuing small small unwelcome modifications

An we’ll further add that bother about most of these distinctions is generally just legitimate in hybrid systems utilizing an individual twin Channel Triode pipe, and it is feasible all of mentioned is complete and utter bull schiit, since again i am no expect for this is solely conjecture centered on my subjective experience.

Auteur : groupeureka

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