Price is for 1 NOS tube. Construction with double-staged O-getter and gold pins. Produced in Mitcham plant in England. Etched codes: 7L1 R2J1
Tested STRONG & closely BALANCED closely as follow:
Ia1 = 12.8 mA | S1 = 10.2 mA/V | Ri1 = 3.1 kOhm | μ1 = 31.6
Ia2 = 12.4 mA | S2 = 10.0 mA/V | Ri2 = 3.0 kOhm | μ2 = 33.0
Tested at Uf=6.3V, Ua=90V, Ug=-1.3V
Good starts at Ia=8.5mA
Shipping will be Airmail registered with tracing number. Other shipping methods available on request.