2x RFT ECC83 / 12AX7

You are bidding on 2 pieces (matched pair!) of *original* RFT (RWN NEUHAUS) ECC83 tubes.
Two pieces of East-German RFT Neuhaus ECC83 / 12AX7 variant with smooth plates and O-getter.


Tube 1: Ia1= 2.10 mA / Ia2 = 2.00 mA, S/gm1= 1.70 mA/V / S/gm2= 1.60 mA/V
Tube 2: Ia1= 2.20 mA / Ia2 = 2.00 mA, S/gm1= 1.75 mA/V / S/gm2= 1.60 mA/V

...where a new/unused tube should have around S/gm = 1.60 mA/V, "good" value for transconductance starts at 1.2 mA/V.


Extremely high quality audio tubes for hifi/high-end/guitar amplifiers.

Combine shipping is possible !

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