DA60 Marconi Osram tubular CV1206 equivalent DA60 pair power triode L4 base Top Pip Holy Grail

Description

Marconi  Osram DA60 is a directly heated output valve for powerful receivers and amplifiers for public address.

The pair we show here are tubular straight side  circa 1930’s.

The Marconi Osram DA60 are the same valve compared to Mullard DO60 which we have shown on this website.

As output valve in public address and other large amplifiers where an output  in excess of that obtained from D.O.24 or D.O.26 valve is required. For a grid excitation voltage of 60 to 70 volts R.M.S. an output of 10,000 milliwatt can be obtained allowing 5% harmonic distortion.

Filament Voltage  6 Volts.

Filament Current 4 amps.

Max Anode Voltage 500 Volts.

Amplification factor 3.5.

Mutual Conductance 3.5 mA/V.

Anode Dissipation 60 Watts.