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History of the manufacturer  

GTC, General Transformer Corporation; Chicago, IL

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Name: GTC, General Transformer Corporation; Chicago, IL    (USA)  
alternative name:
GTC
Abbreviation: gtc
Products: Model types Others Valve re-brand
Summary:

General Transformer Corporation
Chicago, Illinois

Label "GTC".
Manufacturer of "Porta-Power" battery replacement power supply. 

History:

This manufacturer was suggested by Wolfgang Scheida.


Some models:
Country Year Name 1st Tube Notes
USA  45 Porta-Power H   GTC Porta-Power model H, Battery replacement power supply; Supplies 1.4 V & 90 V DC for 4... 
USA  39 Porta-Power L 5W4GT  GTC Porta-Power model L, Battery replacement power supply; Supplies 2 V & 90 V DC for 4 - ... 
USA  30 Perma Power A   General Transformer Co., GTC Perma Power A; Battery eliminator for sets with 4,5 or 6 pcs ... 
USA  35 Porta-Power U 6P5GT  GTC Porta-Power model U, Battery replacement power supply; Supplies 1.4 V/300 mA & 90 VDC/... 
USA  39 Pee Wee Transmitter 25 W [Battery]    2525 W crystal controlled transmitter. Operates on five HAM bands: 10 - 20 - ... 
USA  39 Pee Wee Transmitter 25 W [AC mains]    2525 W crystal controlled transmitter. Operates on five HAM bands: 10 - 20 - ... 

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