Tagacebu/ July 22, 2021/ friendfinder reviews/ 0 comments

It is a performance test for the Schiit Saga pre-amplifier utilizing two various pipes.

The machine and additional pipes are on loan from type user. Start to see the writeup on Schiit Saga in synchronous thread.<

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When I talked about within the breakdown of Saga, the stock pipe is just a Russian made clone of 6NS7 which passes label of 68HC. The additional tube supplied is from Raytheon and had been built in United States Of America. They friend finder com can be seen by you side-by-side here:

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

The pins on the 68HC had some oxidation on them. In comparison the pins in 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 product general but ideally this is certainly lost when you look at the sound, pun intended.

Why don’t we enter into measurements to check out if our western, genuine 6SN7 provides on its promise.

Dimensions much like the review, we started my assessment by measuring performance stability that is warm-up

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

Regarding the good part performance appears to be more stable with less deviation into the graph. Not too this matters much given the variations that are tiny macro degree.

Throughout the measurement we knew my light that is LED was. It had been of a foot over the Schiit Saga. I change it down during measurements but have never noticed it making a positive change prior to. Right right right Here it did, causing one channel to have a bit worse however the other a bit better! Once more, they are very tiny variants of no effect but shows exactly how good our instrumentation is, plus the known undeniable fact that some disturbance is stepping into the machine, possibly coupling towards the pipe it self.

Before getting to the dashboard, here’s how the stock 68HC did:

SINAD (signal over noise and distortion) is all about 97.5 dB. This is how the Raytheon pipe did:

We destroyed very nearly 4 dB in a single channel, and 2 dB within the other. This will be noticeable into the 2nd harmonic which peaks higher with all the Raytheon 6SN7.

Conclusions they state don’t judge guide by its address and that’s real right right right here. The so named “clone” tube did much better than the name brand Raytheon. Needless to say difficult to tell simply how much this correlates with a much bigger test of tubes. For the time being however, the dimensions reveal one step backward so my suggestion into the owner is always to keep consitently the tube that is russian offer the Raytheon.

Ron Texas

Significant Contributor

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In all honesty. I suppose this shows tube rolling might have a result, nonetheless 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 internal tube rolling down a hill up to a river.

Dependent on Fun and Learning
Major 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 for the road there. Its main merit has been in a position to move mildly big voltages, which will be not appropriate in this application. High gm triodes like 6DJ8/6922 will outperform a 6SN7 in this solution, but they are unfortunately not pin suitable. We 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 become one thing “ideal” for a lot of. Because the sound or distortion regarding 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 performance that is high therefore I would definitely recommend the stock. We additionally occur to like “russian” tubes my self anyways. My point being, that I think in Tube Land included noise/distortion is not constantly a thing that is bad. The included but less distortion that is varied of Raytheon might be just 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 in the production values for every triode often provide a less accurate stereo image and so 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 inside the pipe is not a perfect match. The stock pipes production is more consistent with the things I’d wish from the pipe during my own system, it’s maybe not definitely 100% but near enough since it’s just like a 99.7% match. VS one other which will be around 98.4 and therefore little difference correlates up to a 2DB SINAD huge difference that I’m yes because of it self is not audible but had been planning to amplify that single which will likely further add to the “difference” finally resulting little minor unwelcome modifications

An we’ll further add that bother about most of these distinctions is normally just legitimate in hybrid systems utilizing just one twin Channel Triode pipe, feasible each of mentioned is complete and bull that is utter, as again i am no expect of the is solely conjecture predicated on my subjective experience.

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