On the auction is for one pcs(...i have two)  Mullard ecc83 1600 D4, and 1600 F4 long plate, square getter, they are tested as new.

Testing data:

Uf=12,6V

Ug1=-2,0V

Ua=250V

For a new tube: IA=1.2mA and mutual conductance "S" is 1.6mA/V =100%.


(Digital Tube Tester measurement error not more than 2%).


Test results :


             IA             S              IA2           S

1.D4    1.56           1.7           1.51         1.6

1.F4    1.24           1.6           1.24         1.6

Shipping by Airparcel (Fedex or similiar, very fast delivery...) 50USD with tracking number.