TM

Marconi 'R' valve, also known as the 'TM' radio repro tube.

General

Filament Specifications

DC/AC Voltage

4 V

DC/AC Current

0,7 A

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Maximum

DC Plate Voltage

180 V

Dissipation

0,25 W

DC Plate Current

2 mA

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DC Plate Voltage

60-120 V

Grid Voltage

-0,5 V

Transconductance 

0,3 mA/V

Grid Current

‹ 2 uA

Connection of the valve base - view from below