DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound
DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound - Image 2
DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound - Image 3
DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound - Image 4
DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound - Image 5
  1. DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound
  2. DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound - Image 2
  3. DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound - Image 3
  4. DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound - Image 4
  5. DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound - Image 5

DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound

DA30 GEC £ 550 pair

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Description

The DA30 by GEC Osram is a triode for use in the output stage of amplifiers where a considerable undistorted power is required without recourse to the application of high HT voltages.

The main application for a DA3o or DO30 valve is to work in push-pull amplifiers in which a pair of valves are employed under condition which allow for a considerable undistorted power output by adjustment of the anode to anode load impedance to a lower value than the normal figure for class A operation.

Filament Volts 4

Filament current 2 Amps

Anode Volts 500 Max

Grid -134

Anode Current 60mA

Anode dissipation 30 Watts

mA/V 3.5

Both valves tested at 58mA and 57mA 100% emission.

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