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Shootout of Nos 6sn7 tubes

I will have shootout between TS BGRP, RCA vt231, KR vt231, Syl vt231, Raytheon vt 231 and "Bad boy" next weekend.

If I get MELZ 6N8S 6SN7 Metal Base next week, then I will also include it in shootout


RCA5691, Psavne Acme 300B, Psavne Acme 805 are also being used in Line Magnetic 508 amplifier.

Speaker will be Lansche 4.1 with plasma tweeter.

Digital source will be Dave and HMS fed by ripped CD stored in ssd drive of Cocktail audio x30.


I will play

Eva Cassidy's 'Autumn Leaves"

"Trinity Sessionn " by Cowboy Junkies

For classical orchestra, "Trittico" directed by Fennel.

"Still harry after all these years" will be for fusion jazz.

Any more suggestion gentlemen and ladies.

Thomas
128x128shkong78
lowrider57's avatar
lowrider57
5,417 posts
 
That's very high praise for the
1953 6n8s.

I have not experienced any high frequency noise in my 1578's. They are so quiet and transparent I think I would have noticed.
Now I'll have to listen to the highs later today.

Do you hear any noise when music is not playing?

shkong78's avatar
shkong78 OP
1,485 posts
 
I keep hearing noise from 1578 made in 83 but not from two tubes made in  80.


68ns sounds lively but with some noise on an off.

After burning in, the noise may go off. Let us see.
big_greg
6,646 posts
 
@shkong78 Have you contacted the ebay seller about the noise in your 1578s? 

One of mine has noise with no music playing, some crackling.  I can hear it from my listening position about 9 1/2 feet away.  It's not noticeable while listening to music unless there's a quiet section.  I love the overall sound and tone of the 1578s but don't think I can live with the noise.  I've switched the tubes from one channel to the other and the noise follows.

I contacted them about it and they replied with a question, which I have answered.  Waiting to see if they'll offer a replacement.
shkong78's avatar
shkong78 OP
1,485 posts
 
@big_greg


I do not hear noise from the tube bought from Ebay dealer after playing it for 20 hours.

I recommend you to play it more and see what happens.

Some people claimed to have had cured the problem with re soldering pins.

They said most Russian tubes have problem with noise.

https://www.head-fi.org/threads/the-reference-6sn7-thread.117677/page-120#post-15647922


But I am going to see what happens with more break in.


I like Russian tubes with excellent bass and nice value but some of them may need re soldering.
big_greg
6,646 posts
 
@shkong7One tube is as quiet as tubes get, the other is noisy.  
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