These gems are very hard to find in this mint condition any more. Made in West Germany at the ULM factory of Telefunken. All the tubes in stock have the same factory code of U5214104O. Enough said!
Quantity in Stock : 95 pcs
Price : Grade A @ US$135,00/ea ; US$275,00/matched pair
Grade B @ US$125,00/ea ; US$255,00/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.