Specifications

One New Old Stock vintage GE 12AX7 / ECC83 long plate tube. Stamped code on the tube indicates it was made in 1958. Part of the end flap of the box is missing. I tested the tube on my Hickok 539C. Minimum value for this tube type is 875 µMhos. Hickok didn't publish nominal values for the tubes, only the minimum value. It is believed the minimum value is 65% of the nominal value. So 875 / 65% = about 1,350 for a new tube. Triode No. 1 - 1,275 µMhos Triode No. 2 - 1,375 µMhos I will gladly combine shipping, but have no way to calculate the cost in advance. Please pay for your items through the checkout system and I will refund the exact amount of the over-payment after I've packaged everything and purchased the shipping label.

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