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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
shkong78's avatar
shkong78 OP
1,485 posts
 
I am listening to "Vision of Love " by Maria Carey through 1578 that I had bought from Russian dealer ( made in 80 same source as bought by big-greg and Lordcloud).

i do not notice any high frequency noise out of it.

Another interesting thing is that I had felt 1578 rather closed in with RCA 5691 (6sl7) in front of 1578 in Line Magnetic 508 amp.

But using Russian 6n9s made in 53 instead of 5691, this 1578 does not sound closed in but almost perfect neutral balance.


Now I am playing Miles and Coltrane "Straight No Chaser" track.

Trumpet sounds so clean with enough sparkle but not too hot.



big_greg
6,646 posts
 
I didn't feel like the 1578s had closed in highs and I didn't notice any noise in the upper registers, just the crackling out of one tube.  They definitely had more pronounced bass, perhaps that gives some the impression of "closed in highs"?
lowrider57's avatar
lowrider57
5,417 posts
 
I'm using the 1980 1578 in the Atma-sphere gain stage with a Sylvania GTA in the 2nd stage. There's lots of high-end sparkle and air due to the GTA's excellent highs and mids.
That's why I haven't noticed a lack of extension with the 1980's.

@testpilot, there are no Melz 1970s to be found, but I'll continue to search.

lowrider57's avatar
lowrider57
5,417 posts
 
@big_greg , did you return the defective tube?

big_greg
6,646 posts
 
@lowrider57 I returned they pair.  They said they'd send me another matched set.
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