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Marconi R Valve
Marconi 'R' valve also known as the 'TM' radio repro tube
Maximum Plate Voltage 180 V
Maximum Plate Current 2 mA (Vf=4V,Vg=0V)
Va 120 V
Ia 1 mA
Vg -0.5 V
Transconductance 0.3 mA/V
Filament Voltage 4 V (DC/AC)
Filament Current 0.6 A