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Old 16th Dec 2021, 10:30 am   #53
PJL
Dekatron
 
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 5,997
Default Re: Early Unusual Transformer Design

Transformer wallwarts were banned because they consume power when not loaded. To keep cost and size down mains transformers are designed with the fewest number of primary turns they can get away with and that means lower inductance, higher standing current and higher no load resistive losses.
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