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History of the manufacturer  

Eastern America Trio; College Point, N.Y.;(trisonic)

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Name: Eastern America Trio; College Point, N.Y.;(trisonic)    (USA)  
Abbreviation: easternam
Products: Model types

Eastern America Trio Products Inc., College Point, New York.

Step Up & Down Transformer Trisonic model TS-403-3P,


This manufacturer was suggested by Emilio Focosi.

Some models:
Country Year Name 1st Tube Notes
USA  90 Step Up & Down Transformer 300W TS-403-3P   Converts electricity voltage from 220/240 to 110/120 or 110/120 to 220/240; maximum power ...