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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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Product Reviews
★★★★★ 5
Great Set
Size: 2017-2025 FD-4625 Fuel Filter Set
Worked perfectly with my 2019 Ford F-350.
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Reviewed in the United States on January 18, 2026
★★★★★ 4
Oil filter did not fit
Size: 2017-2025 FD-4625 & FL2124S Fuel Filter Set
The oil filter would not tighten all the way down. I have a 2017 F250 6.7l. The fuel filters worked but oil filter did not want to tighten all the way down.
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Reviewed in the United States on August 3, 2023
★★★★★ 5
No issues
Size: 2017-2025 FD-4625 Fuel Filter Set
Ive been running these aftermarket filters without any issues. They arent oem but no issues.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Quality filter
Size: 2017-2025 FD-4625 Fuel Filter Set
Same quality as oem part. Quality materials. Worked perfectly and fit well.
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Reviewed in the United States on July 18, 2025
★★★★★ 5
Amazing
Fit as directed for my wifes 1998 ford explorer sport and worked as described.
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Reviewed in the United States on May 6, 2026