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Description
ECC83 12AX7 EI Yugoslavia Telefunken Long Smooth Plates 17mm NOS Matched PairTwo (2) fully tested NOS tubes, platinum matched pair of rare ECC83 12AX7 EI made in Yugoslavia on geniuine Telefunken made tooling machines . They are real vintage NOS tubes in original boxes made back in late 80s early 90s in EI tube factory in Nis, Serbia. (Elektronska Industrija Nis) If you like sound of Telefunken's smooth plates ECC83 12AX7, you'll like these too, because they are (almost) exact copy. The only differences are in thickness of
Two (2) fully tested NOS tubes, platinum matched pair of rare ECC83 12AX7 EI made in Yugoslavia on geniuine Telefunken made tooling machines .They are real vintage NOS tubes in original boxes made back in late 80s - early 90s in EI tube factory in Nis, Serbia. (Elektronska Industrija Nis)
If you like sound of Telefunken's smooth plates ECC83 12AX7, you'll like these too, because they are (almost) exact copy. The only differences are in thickness of halo getter and in "staples" which are facing each other.
I have few 100 pcs boxes of these tubes and I had enough time last few months to carefully measure them on my Metrix and Tesla tube testers for plate currents and Hickok for transconductance and to make platinum matched pairs with balanced triode sections.
You can find them rebranded Telefunken, Philips and Siemens, because all three factories had contracts with EI. These are pre war tubes, with exceptional quality, made with 1st class materials, because of that many of them have been rebranded like long life premium versions E83CC and sold by Siemens and Philips in their boxes.
You can also find them relabeled Telefunken with diamond mark on the bottom last few years! Diamond bottom mark is done on laser machine, and if you want to avoid that and to be sure that you are buying genuine Telefunken ECC83 12AX7, just take a look at getter and how staples are faced. Diamond bottom is not proof any more ...
If you want to know more about Telefunken ECC83 12AX7 and different types of smooth plate and ribbed plate versions you should read this article on my site: www.tubes.rs/ecc83-telefunken-12ax7/
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4.5 ★★★★★
Based on 1954 reviews
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Product Reviews
★★★★★ 4
8/10 Front Pocket Wallet
Color: Black (Front Pocket)
It's a pleasing solution for me. The slim, pocketed design fits well in my front pocket. It probably fits other pockets well too.
It's not perfect. But, it's solving for an imperfect solution that Apple is takling with their phones. Tap to pay with phones and digital ID will change the market for wallets.
The physical size of cards limits how readily you can access any one card. It takes a bit of extra dexterity to pinch or slide some of the cards out. Ideally you'd have 4 on the outside, with remaining cards tucked in the center pocket. I just need more than 1/4 inch of card face to slide one out readily.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Very nice wallet.
Color: Carhartt Brown (Trifold)
Very nice.
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Reviewed in the United States on April 22, 2026
★★★★★ 5
Size
Color: Black (Bifold)
It’s not a thick wallet, which is what my husband likes. Makes sitting or driving for long periods with it in his back pocket better. Has everything larger wallets have. Will purchase it again.
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Reviewed in the United States on March 19, 2026
★★★★★ 5
Rugged wallet built to last (even if wallets themselves are becoming obsolete)
Color: Black (Trifold), Color: Black (Trifold)
This is a really well-made wallet. If you’re familiar with Carhartt products, the construction here is exactly what you’d expect: tough, practical, and clearly designed to take some abuse.
The material is "700D nylon duck fabric", which feels thick and durable—more like a piece of work gear than a fashion accessory. In the photos you can see the tight stitching, heavy canvas-like texture, and reinforced seams, all of which suggest it should last for years. It feels like the kind of wallet that could live in a back pocket, get sat on, tossed around, and still keep going.
Inside, the layout is simple and functional. The see-through mesh ID window is one of my favorite touches—it makes it easy to show an ID without removing it. The card slots are snug and the trifold layout keeps everything organized. There’s also a small zippered pocket, which you can see in the photos along the side. It’s not huge, but it can hold a few coins or maybe a couple of small keys.
The wallet also includes RFID blocking, which is nice if you’re concerned about wireless card scanning. On the flip side, that also means you can’t just tap the wallet against a reader for contactless payments. You’ll need to take the card out first.
Carhartt also advertises water resistance, which makes sense given the nylon construction. Realistically, most of us aren’t dunking our wallets in water, but it’s nice to know it could handle rain or the random spill (though come-on! How often does that happen with a wallet??)
One interesting thing: wallets themselves are starting to feel a little outdated. I rarely carry one anymore, and most of my family uses phone wallets or digital payments. But if you’re someone who still likes having a physical wallet for cards, ID, and some cash, this is a solid one.
It’s a simple, rugged, no-nonsense wallet that should last a long time - very much in line with the Carhartt reputation. If you’re still in the wallet camp, this is a dependable choice. Plus it makes a nice gift.
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Reviewed in the United States on March 2, 2026
★★★★★ 5
Sturdy, well-made wallet
Color: Black (Trifold)
Sturdy, well-made wallet, soft to the touch. nice looking. seems comfortable enough in the back pocket. good size. made from quality materials.
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Reviewed in the United States on May 1, 2026
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