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History of the manufacturer  

Colby's Telegraph School; Auburn, New York

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Name: Colby's Telegraph School; Auburn, New York    (USA)  
Abbreviation: colby
Products: Model types

Colby's Telegraph School; Auburn, New York.

Colby's Telegraph School advertised various models in the early 1920's. They were a frequent advertiser in the magazine Radio News.

From November 1920 Radio News advertisement. Even though they were apparently a "Telegraph School" they advertised several different tuners over the early 1920's.

This manufacturer was suggested by Alan Larsen.

Some models:
Country Year Name 1st Tube Notes
USA  21 Regenerative Tuner   The Colby's Telegraph School Regenerative Tuner covered the 200-600 meter wavelength. It f... 
USA  20/21 Long Wave Regenerative Tuner   Colby's Telegraph School Long Wave Tuner. Wavelength Range: 2,500 to 20,000 meters 
USA  14–16 Loose Coupled Tuner   Colby's Telegraph School loose coupler. This coupler originally sold for $10.00... 
USA  16/17 Slide Tuner    
USA  17 15,000 Meter Loading Inductance   15,000 Meter Loading Inductance in quartered oak case with 9 taps.  
USA  17 Undamped Tuner   Big Undamped Tuner, 20 taps on primary, 14 on secondary, brings in German Long Wave sta... 
USA  24 Radio Frequency Broadcast Receiver UV201A  Colby Radio Frequency Broadcast Receiver 
USA  17 Navy Type Loose Coupler Receiving Transformer   The second Colby patent in 1914 improved on the first Colby tuning coil patent refini... 
USA  16 Navy Loose Coupler   Colby's Telegraph School Navy Loose Coupler 


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