Siemens - Paired Tube Set E 280 F NOS Gold Pins Tube amplifier

2 Siemens tubes in NOS / unused condition
E 288 F / 7722 Type
with gold pins

Technical specifications
Tube type: broadband pentode (often produced as special quality / S.Q. with gold-plated pins)
Socket: 9-pin noval socket
Heater: indirect, heater voltage 6.3 V, heater current 0.315 A
Usage: Originally developed for professional RF, IF and broadband amplifier applications, today often valued in high-end audio equipment (e.g., phono preamps or DACs).

without outer carton, but I assure you these tubes have never been used!

The pictures are part of the description.
Shipping will be well-packaged and insured