EI ECC83 / 12AX7 (Pre-War Yugo Tubes)

EI-Elektronska Industrija ECC83
Awesome sounding 12ax7 from pre-war Yugo...
Ei Yugoslavia bought all of the old Telefunken stock and equipment in the 1970s, and produced these tubes, identical to original Telefunken smoothplates! These were about the best to come out of Eastern Europe in the late 1970s, they even flash orange when energized like the vintage European tubes do. Available under several labels as Edicron, RSD, National, Trigon. Tight-matched pairs available.

Quantity in Stock : Out of Stock!
Price: Grade A @ US$47,00/ea ; US$98,00/matched pair 
         Grade B @ US$39,00/ea ; US$84,00/matched pair
         Grade C @ US$25,00/ea ; US$52,00/matched pair

Grade A - The best in the stock. Lowest noise and microphony with the tightest balanced sections we have available. This is typically 10% or often tighter given the large volumes of our stock.
Grade B - Low noise and microphonics with a section balance typically between 15% and 20%, but may be higher depending on available stock.
Grade C - Lowest noise but slightly microphonic. Section balance will be similar to Grade A or B. This grade is only suitable for use in the driver stage of an amplifier, or the output/buffer stage of a DAC or CD Player


  1. This is one of my favorite tubes. Clear and touch sensitive with a nice full range to them. Really nice breakup.

  2. I bought one of these a few weeks back for my Marshall 4010 combo. It is a better tube than the current production tubes I've tried (5 brands so far). I finally gave in and went NOS and I'm glad I did. The tubes arrived within a few weeks (I'm in the US) very well packed and looking just like the pictures. These are very full and articulate in V1 of my amp and I knew within the first seconds of turning the standby off that I made a good purchase. Thank you Koray!

  3. I bought from Koray 3 EI ECC83 . Im very happy with the tubes . in addition all the handling was very professional. I'll be happy to continue and work with Koray in the future


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