MATCHED QUAD 6N8S (6H8C) FOTON Tubes NOS 1957-1965

Double Triode

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

Made FOTON plant 1957-1965

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 Ia1/Ia2: 

1) MQ tubes

10.0/9.0 mA

10.0/10.0 mA 

11.0/8.0 mA 

10.0/9.5 mA 

2) MQ tubes

9.0/9.5 mA

9.5/9.0 mA 

9.5/9.0 mA 

8.0/8.0 mA 

3) MQ tubes

8.2/7.0 mA

7.5/9.0 mA 

8.5/7.5 mA 

7.5/8.0 mA 

4) MQ tubes

11.0/10.5 mA

10.0/11.0 mA 

11.0/10.5 mA 

10.5/11.5 mA 

I ship with tracking number.
Items are well packed.
I always answer all questions.