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Description
Platinum matched pair ECC83 12AX7 EI Yugoslavia Telefunken Long Smooth Plates 17mm NOS NIB rebranded UnitedTwo (2) fully tested NOS tubes, platinum matched pair of rare ECC83 12AX7 EI made in Yugoslavia on genuine Telefunken made tooling machines, rebranded United National. 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
Two (2) fully tested NOS tubes, platinum matched pair of rare ECC83 12AX7 EI made in Yugoslavia on genuine Telefunken made tooling machines, rebranded United National.
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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4.4 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Really nice shoe
Size: 8, Color: Black Brogue, Size: 8, Color: Black Brogue
I bought these shoes with plans to take photos with my son for Christmas. It was last minute and these really impressed. Other places were charges $20+ more than the rate here on Amazon. They fit true to size. They Look super nice and sleek and got the job done.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Outstanding value
Size: 11.5, Color: Black
Good looking, comfortable shoes. Fit was right on the button...took a shine very nicely. Great value for the money.
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Elegant clean look
Size: 8.5 Wide, Color: Black
Really nice! Good quality, just had to change size little bit big for my son
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Reviewed in the United States on April 28, 2026
★★★★★ 1
You get what you pay for
Size: 13, Color: Black
First thing I noticed when unboxing was the Strong plastic smell coming out of the shoe
I tried them on and Shoe runs small I bought size 13 and it was way to tight I ended up giving them to a co worker that use size 12 and fit him perfectly, he started walking and the rubber sole was leaving black marks all over the tile floor you could see exactly where he was stepping and left a trail he literally used them for less than 1 hr and ended up throwing them away, definitely you get what you pay for. Reminds me of payless shoes, cheap smelly plastic shoes.
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Nice shoes
Size: 8, Color: Black
Perfect fit! My husband loves the shoes.
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Reviewed in the United States on May 18, 2026