Price is for 1 either NOS or very close to such tube. Small double triode tube with gray plating and one D-shaped getter. Pin base is noval (B9A) shape. Produced in Heerlen plant, Hollandin the early 1960s. Etched code is: DJ5 𝛥8A
Tested VERY STRONG as follow:
Ia1 = 18.8 mA | S1 = 13.1 mA/V | Ri1 = 2.3 kOhm | μ1 = 30.1
Ia2 = 20.4 mA | S2 = 12.7 mA/V | Ri2 = 2.3 kOhm | μ2 = 29.2
Tested under: Uf = 12.6V | Ua = 250V | Ug1 = -2.0V
Where good starts at Ia=8.5mA and 100% is Ia=15.0mA
Shipping will be Airmail registered with tracing number. Other shipping methods available on request.