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Tungsol Roundplate 6SN7: Why so magical?

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Posted on June 27, 2020 at 15:46:53
Jay Buridan
Audiophile

Posts: 10282
Location: Michigan
Joined: January 21, 2004
 Any theories as to why the RP sounds so magical?

Also, just wondering if a modern equivalent is attainable?

"Horse sense is the thing a horse has which keeps it from betting on people. "
― W.C. Fields

 

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RE: Tungsol Roundplate 6SN7: Why so magical?, posted on July 2, 2020 at 06:44:52
SETdude
Audiophile

Posts: 3944
Joined: January 20, 2000
 *I* prefer the Sophia blue 6SN7, YMMV.

 

RE: Tungsol Roundplate 6SN7: Why so magical?, posted on July 6, 2020 at 21:12:42
mulveling
Audiophile

Posts: 222
Location: Atl
Joined: April 29, 2011
 Well, no other 6sn7 I've seen has those round / cylindrical plates, so that's a good candidate for the difference maker. They look more like 6sl7 plates - in fact most makes of that type features round plates, albeit usually in a cylinder of a larger diameter than the TSRP.

I know there are always several that pitch in these threads about how they don't get the TSRP hype, and so or so tube is better - but I agree with you that the TSRP are indeed magical, and no other 6sn7 sounds quite like them.

 

RE: Tungsol Roundplate 6SN7: Why so magical?, posted on July 8, 2020 at 03:55:45
Story
Audiophile

Posts: 10453
Location: NJ
Joined: December 11, 2000
 JB - I looked at my stash and the RCA's, Raytheon's, and National Union's all have round plates. These are all WW2 vintage and original i.e. not made by anybody else. NU's tend to be microphonic but sound real nice.

The best and most magical I have ever tried are the Sylvania's which have round plates. There's something they used in the construction that makes for the clearest cleanest high end above all the others.



 

RE: Tungsol Roundplate 6SN7: Why so magical?, posted on July 9, 2020 at 10:18:41
Tre'
Industry Professional

Posts: 17302
Location: So. Cal.
Joined: February 9, 2002
 Are you sure you're not looking at 6sL7s? Almost all of those have round plates.

I have over 100 vintage 6sn7s and the only ones with round plates are the tung sols.

I did find one reference to the "rare" round plate RCA 6sn7.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

 

RE: Tungsol Roundplate 6SN7: Why so magical?, posted on July 9, 2020 at 15:50:01
Story
Audiophile

Posts: 10453
Location: NJ
Joined: December 11, 2000



I should have updated my tube list as I probably sold them or put them somewhere IDK. I have one branded Syl but it may be re-labeled. The 2 Sylvania's I had were chrome throughout. My mem is failing me. I had 2 mono blocks I converted to 6sn7 driver tubes long gone. I do have a bunch of 12sl7's from past projects sitting around here somewhere.



 

RE: Tungsol Roundplate 6SN7: Why so magical?, posted on July 9, 2020 at 17:41:29
Tre'
Industry Professional

Posts: 17302
Location: So. Cal.
Joined: February 9, 2002









Here's part of my collection of 6sn7s. There are 105 6sn7s pictured. None of these are round plate.
I guess I miss out. :-)

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

 

RE: Tungsol Roundplate 6SN7: Why so magical?, posted on July 20, 2020 at 03:16:59
andy evans
Audiophile

Posts: 4382
Joined: October 20, 2000
 I had about half a dozen which I sold much too cheaply. But they were not as good as two 7193. They were the best of the 6J5 types without question. Annoying to have 2 top caps, and anyway I only use DHTs so not really interested in 6SN7s. They're not the best sound you can get out of an input tube.

 

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