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History of the manufacturer  

ABC Laboratories, (where?)

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Name: ABC Laboratories, (where?)    (USA)  
Abbreviation: abc
Products: Model types
Summary:

ABC Laboratories, Riders 7-1 misc shows a one tube police band converter.

History:

This manufacturer was suggested by Konrad Birkner † 12.08.2014.


Some models:
Country Year Name 1st Tube Notes
USA  36 100 Police Converter 6A7  Frequency conversion range 1500 - 2600 kc. 

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