settings: Va = 250V, Vs = 250V, Vg = -13.5V , Vh = 6.3 V
a good (NOS) tube test for: Gm = 11mA/V and Ia 75 mA
Testresults:
Tube 2 : Ia = 58mA (77%)
Gm = 6mA/V (55%)
- Date code
- 5xSYA
- Factory
- Eindhoven Holland
- Year of Manufacturing
- 1954
- Generation
- 2nd
- General availability
- Very Rare
- Condition
- Used (see test results)
- Label markings
- label & serial number readable
- Tube 1 - Section 1: DC plate current in mA
- 58
- Tube 1 - Section 1: Mutual transconductance in uMhos
- 6
test