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M7B

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ID = 46496
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Developer: Mullard Radio Valve Co. Ltd.;  
Tube type:  Triode, vacuum   Power/Output 
Identical to M7B

Base Wires Wires only
Filament Vf 16.5 Volts / If 9.5 Ampere / Direct / Parallel, (AC/DC)
Description "This valve is specilly designed for use as an output valve in Public Address Amplifiers of the largest type such as are employed in the open air at football grounds, and for similar purposes where an undistorted output of about 100 Watts is required. It is also suitable for use as a modulator in choke control telphony transmitters." Mullard.

Pa <400W, Va < 3000; Ra 3100 ohms, 2.3mA/V

 

Literature Experimental Wireless & Wireless Engineer   Mullard advertisement January 1932
 
mullard_m7b.jpg
M7B: RFJ
Roy Johnson

 

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