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History of the manufacturer  

Diana Laboratories; New York, NY

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Name: Diana Laboratories; New York, NY    (USA)  
Abbreviation: diana
Products: Brand
Summary:

Diana Laboratories
250 Park Ave., New York, NY

Tube brand: Diana

George Fathauer's book "Radio Tubes and Boxes of the 1920s" shows a box of a D199 tube. 201A tubes and their boxes also exist. 

The company also made tubes with the Lord Baltimore brand. This is listed on page 358 of Tyne's "Saga of the Vacuum Tube". this information is possibly incorrect as a tube box for a Lord Baltimore LB199 shows the manufacturer as Lord Baltimore Laboratories, Newark New Jersey.

History:

This manufacturer was suggested by Fin Stewart.


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