MELZ 1578 / 6H8C / 6SN7 Black Plates w/Round Holes USSR

MELZ 1578 / 6H8C Black Plates w/Round Holes 1976 USSR
Made by MELZ Factory (Moscow, USSR). Metal base, black plates with holes. Military equipment with OTK label. An excellent 6SN7 with outstanding engineering and beautiful sound. These are the genuine 1578's which are ultra rare nowadays. All from the same batch of 1976. NOS and MINT.

Quantity in Stock : Out of Stock!
Price :  Grade A @ US$139,00/ea; US$283,00/matched pair;
           US$571,00/matched quad

Grade B @ SOLD OUT!  

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.

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