MATCHED QUAD 6N8S (6H8C) FOTON Tubes 1952-1957

Double Triode

RIBBED Anodes

Up for sale lot of MATCHED QUAD 6N8S (6H8C) FOTON tubes.

Made in plant FOTON 1952-1957

Tested with tube tester L3-3, as well as on the vacuum tube amplifier.

Сonditions for test:

Uf=6.3V

Ua=250V

Ug1=-8V

Ug2=250V

Results for Ia1/Ia2: 

1)MQ tubes

This M.Quartet is SOLD!!!

8.5/9.0 mA

8.8/9.0 mA

8.5/9.5 mA

9.5/8.5 mA 

2)MQ tubes

8.0/9.0 mA

8.0/9.0 mA 

8.0/9.0 mA

9.0/8.0 mA 

3)MQ tubes

This M.Quartet is SOLD!!!

9.5/10.0 mA

9.5/10.5 mA 

9.5/10.5 mA

10.0/9.5 mA 

4)MQ tubes

This M.Quartet is SOLD!!!

8.5/9.0 mA

8.5/9.0 mA

8.0/9.5 mA

9.5/8.0 mA 

5)MQ tubes

This M.Quartet is SOLD!!!

9.5/9.5 mA

9.0/10.0 mA

10.0/9.0 mA

9.0/10.5 mA

6)MQ tubes

This M.Quartet is SOLD!!!

10.0/8.0 mA

10.0/8.0 mA

10.0/8.5 mA

10.0/8.5 mA 

I ship with tracking number.

Items are well packed.
I always answer all questions.