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History of the manufacturer  

Doubleday-Hill Electric Co. (DHE); Pittsburgh, PA

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Name: Doubleday-Hill Electric Co. (DHE); Pittsburgh, PA    (USA)  
Abbreviation: doubleday
Products: Model types
Summary:

Doubleday-Hill Electric Co.
719 Libert Streeet, Pittsburgh, PA (1916)

The Doubleday-Hill Electric company was a major electrical supplier in the early 1900's. They had moved to a new 5 story building in Pittsburgh in 1903. Apparently in the teens they started building radio apparatus. In April 1917 QST they ran an ad for a rotary spark gap. They made a least 1 model of loose coupler receiving transformer licensed by Marconi. 

DHE Co also sold tubes with their own brand.

History:
KQV is one of the oldest radio stations in the world. KQV signed on as 8ZAE on November 19, 1919 and was owned by The Doubleday-Hill Electric Co. In January, 1921 8ZAE became known as KQV, although the FCC did not officially grant the call letters until January 9, 1922. KQV stood for King of the Quaker Valley.

This manufacturer was suggested by Alan Larsen.


Some models:
Country Year Name 1st Tube Notes
USA  17 Rotary Spark Gap   Doubleday-Hill Electric Co. advertised this "Two Gaps in One" rotary spark gap in the Apri... 
USA  19 Loose Coupled Receiving Transformer   Doubleday-Hill Electric Co. Loose Coupled Receiving Transformer Licensed under Marconi Pat... 
USA  23 DHE R 24 Receiving Set   Consisting of a R-24 Jr. Receiving Transformer, R-41 Crystal Detector, Fixed receiving ... 

[rmxhdet-en]

Further details for this manufacturer by the members (rmfiorg):

December 9, 1923 The Pittsburgh Sunday Post newspaper page 10tbn_usa_doubleday_hill_electric_pittsburgh_daily_post_sun_dec_9_1923.jpg
1916 catalogtbn_usa_doubleday_logo.jpg

  
rmXorg