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History of the manufacturer  

Pacific Radio Exchange; San Francisco, CA

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Name: Pacific Radio Exchange; San Francisco, CA    (USA)  
Abbreviation: pacif-raex
Products: Model types
Summary:

Pacific Radio Exchange
439 Call Building, San Francisco, CA (1920)

In a November 1922 Radio magazine advertisement they offered a line of individual box sets that could be strung together to form a complete radio. 

History:


Some models:
Country Year Name 1st Tube Notes
USA  34 Spero Super 58  Push-pull af output stage. 
USA  34 Spero Four 58   
USA  22 Paradex Audio Frequency Amplifier UV201  Pacific Radio Exchange offered a line of little "box" sets that could be strung together t... 
USA  22 Paradex Radio Frequency Amplifier UV201  Pacific Radio Exchange offered a line of little "box" sets that could be strung together t... 
USA  22 Paradex Tuner   Pacific Radio Exchange offered a line of little "box" sets that could be strung together t... 
USA  22 Paradex Detector   Pacific Radio Exchange offered a line of little "box" sets that could be strung together t... 
USA  20 Paradex Compass Coil    

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