This listing is for 2 NOS tubes that were SEALED beam power output tubes. They are a highly sought-after version from the early 1960s, made in England. Please note that all tubes were sealed and opened by us personally.
They have been tested VERY STRONG with the following results:
Ia=39.7mA | S=7.8mA/V
Ia=41.6mA | S=8.5mA/V
Testing was conducted under the following conditions:
Uf=6.3V Ua=Ug2=250V Ug1=-8.5V
Where 100% Ia=40.0mA
These are EXCELLENT PRESERVED NOS TUBES FROM A MILITARY SURPLUS!
Shipping via registered airmail with tracking number. Import fees for U.S. buyers are included in the shipping cost under the new tariff regulations. Other methods available upon request.