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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
 
Big Greg and shkong,
One of my 1578's started crackling and popping today. I cleaned the pins, no difference. Swapped channels and the noise follows.
I let the amp idle for a while and then I smelled something cooking; it was the tube.

I shut down and now will check the amp for any damage.
I don't understand after full burnin and hours of playing that this tube problem presented.

shkong78's avatar
shkong78 OP
1,485 posts
 
@lowrider57


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


That is why I consider soldering myself or send them to someone who can do better job than I,

Even if you get a replacement tube, they can develop problem later.
lowrider57's avatar
lowrider57
5,417 posts
 
I saw your earlier post about this. I'm pretty good at soldering, but have no clue how to work on a tube. Also, I wouldn't want to mess it up.

shkong78's avatar
shkong78 OP
1,485 posts
 
@lowrider57 

You can go through the Head fi thread that I gave you and then if you are comfortable, then you can try to re solder the pins.



Thomas
lowrider57's avatar
lowrider57
5,417 posts
 
I'm going to contact the seller tonight. I received my second pair of 1980's, so I'll have a listen to them.

Did that high frequency noise go away? Which tube was it?

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