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It was my understanding that other some super rare NU ones, all 7n7s were made by Sylvania and they tended to mimic their 6sn7 lineup. I assumed the 14n7 would be the same. I was happy to learn that they actually have the extra copper support like the super expensive metal base 6sn7 from Sylvania. And then there is these tubes. They have strange branding on them, never seen a sylvania logo like that before on a tube. Plus, these are grey glass, looking like the old RCA 6sn7. Anyone ever seen these before? They sound thick and warm, kind of bassy in my Supratek Cabernet.
My music and Yemen Blogs at www.isaharr.com
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I used to have a bunch of them - mainly Tungsol. Sold them all for a fraction of what they'd go for today. They had a big round sound, but I preferred two 2C22. Better sound, more detail.
You think TungSol made that?I have no idea, just asking.
It doesn't look like a Sylvania bottle, unless I'm overestimating its age.
Maybe a chrome-dome mated with a metal-base? Or a three way with an NU gray glass?
Edits: 09/04/21
It's definitely a Sylvania. While I've never seen that branding before I have never seen any other tube mark tubes in the top like this except Sylvania.
My music and Yemen Blogs at www.isaharr.com
That's a weird one for sure. I've never seen anything like that one.
Is that dark coating on the inside or outside of the glass? Kind of hard to tell from the pic.
And is it a metal base plugged into an adapter in the pic? That's a really bizarre looking tube.
The coating is on the inside. The tube is plugged into an octal adapter so I can use it in my preamp. Here's another image that makes it look like one of the RCA grey glass 6sn7 tubes.
My music and Yemen Blogs at www.isaharr.com
The gray coating appears to be on the inside.
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