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Description
ECC83 12AX7 EI Yugoslavia Telefunken Long Smooth Plates 17mm Matched Pair NOSCountry of Manufacture: Yugoslavia MPN: 12AX7ECC83 Brand: EI Type: Vacuum Tube Model: 12AX7 ECC83 Auction is for two (2) fully tested NOS tubes, platinum matched pair of rare ECC83 12AX7 EI made in Yugoslavia on geniuine Telefunken made tooling machines. Please pay attention that they DO NOT HAVE ANY PRINTS! 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)
Country of Manufacture: Yugoslavia
MPN: 12AX7ECC83
Brand: EI
Type: Vacuum Tube
Model: 12AX7 / ECC83
Auction is for two (2) fully tested NOS tubes, platinum matched pair of rare ECC83 12AX7 EI made in Yugoslavia on geniuine Telefunken made tooling machines. Please pay attention that they DO NOT HAVE ANY PRINTS!
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/
I collect tubes and tube gear for more then 35 years and I start to sell recently, please be sure to check my other items and visit my store for more rare NOS tubes and parts.
If you buy any item on ebay from me and for if you are not fully satisfied for any reason or have any complains, please send me message before leaving negative or neutral feedback or opening a case. I really do care about your satisfaction and I’ll do my best to solve any kind of problem.
I have more than 250000 NOS tubes in stock and just small part is listed here, if you are interested in any specific tube or part, please send me message.
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4.2 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
It works!
Great product! Do what it said it does.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 17, 2023
★★★★★ 1
Whitening
Terrible. Used the whole tube as instructed and no change in color.
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Reviewed in the United States on May 5, 2023
★★★★★ 5
Perfect for Travel — Amazing Foam, Great Taste, and Long-Lasting Freshness
Flavor Name: A Coconut+Green Tea+Peach
These Popboom mouthwash tablets seriously exceeded my expectations. They foam up really well, much more than other tablets I’ve tried, and they leave my mouth feeling clean and refreshed without that harsh, overpowering burn you get from liquid mouthwash. It’s a really nice break from traditional toothpaste and works great for bad breath, even hours later.
As someone who travels frequently, this product is an absolute must-have. The tablets are compact, lightweight, and spill-proof, so I can throw them in any bag or pocket without worrying about leaks. They’re perfect for situations when you don’t have access to water but still want fresh breath—just pop one in and you’re good to go.
Flavor-wise, they’re fantastic. Coconut is hands-down my favorite, and I also tried the trio pack to sample different options. Peach was enjoyable, while matcha wasn’t really my thing (I’ll be giving that one away), but overall the flavors are fresh, pleasant, and not overwhelming. These definitely foam up better than most similar products on the market.
I also love how convenient they are—no bulky bottles, no mess, and nothing heavy to carry around. The size is perfect, the taste is great, and I find myself reaching for them throughout the day. I’ve already reordered and will continue to keep these stocked.
If you haven’t tried these yet and you’re always on the go, what are you waiting for? These are a game-changer for travel, work, or anytime you need quick, effective mouth freshness.
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Reviewed in the United States on February 4, 2026
★★★★★ 5
Convenient and taste good
Flavor Name: A Coconut+Green Tea+Peach
These are so handy to keep in my purse and I like all of the flavors. They really help make my whole mouth feel cleaner, not just my teeth.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
A good gift!
Flavor Name: A Coconut+Green Tea+Peach
The coconut is really good! I gave the other two to my friends who love them both! Perfect for gifting each flavor came individually wrapped and packaged! If you like the lush cosmetics tooth tablets you’ll love these! I got these because I dislike minty tastes
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Reviewed in the United States on May 23, 2026