EF800 Telefunken, true NOS/NIB, diamond , holy grail, oldest production


Out of stock

SKU: 2020200027 Categories: , ,


Telefunken EF800/CV5092/6BX6 tube. This tube is absolutely new and in immaculate condition.

The EF800 is the milspec/professional longlife, low noise version of the EF80/6BX6.

It is the gold standard for the Miktek CV4 Mk9 Bock Audio 241, Stam Audio SA-47, Golden Age GA-47 etc.

These tubes are from the mid 1960ies in the Telefunken old-style white boxes. All tube boxes carry stamps from either 1965 or 1966. These tubes are from governmental provenance and carry governmental stamps on the glass envelope. They were supposed to be used in highly sensible Rohde & Schwarz equipment.

You will find the Telefunken diamond on the bottom of each tube and in most boxes the original warranty certificate is still present.

Each and every tube will carefully be tested before shipping to guarantee best performance.

The tube is guaranteed to be new and unused from vintage governmental stock!

We also do have other Telefunken EF800 and Siemens with gold pins (Tesla made) in stock. Please ask…

Additional information

Weight50 g




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