Duovac Tube tester in suit-case , all tubes, valves & cathodic oindicators

Full documentation here:

Summary of the characteristics of this lampmeter:

Size : 330 x 240 x 140 mm

Weight : 4,3 kgs

Supply : 220V – 230V / 50-60 Hz ( 115 V sur demande ) ou 12V par convertisseur

Consumption : 25 à 35 VA max. ( Mains )

2 amperes under 12V througyh a 12 to 230V inverter

Mains fuse : 1 A Fast 5 x 20 mm

Measurement Mode: Pulsed, run by a 8 bits micro-computer clocked at 12 MHz

ADC sampling: 10 bit monotonous (1024 points)
 
Duration of the measurement window: 800 μS

Interval between measurements: 0.5 second

General accuracy: better than 5% +/- 1 digit
 

Heating voltages* : 4 V – 5 V – 6,3 V

Heating current : 3,5 A maximum

Heating voltage accuracy : better than 5 % , regulated

Grid 1 voltage: 0 à – 100 volts minimum +/- 5%

Grid 2 voltage : 15 à 350 volts minimum +/- 5%

Plate voltage : 2 à 500 volts minimum +/- 5%

Plate current ( maximum ) : 340 mA

Display resolution, grid 1 voltage: 0.1 volts + / - 1 digit

Display resolution, grid 2 voltage: 1 V + / - 1 digit
 
Display resolution, plate voltage: 1 V + / - 1 digit

Display resolution, plate current: 0.1 mA + / - 1 digit up to 34 mA

1 mA + / - 1 digit  I > 34 mA