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#16
11-24-2016, 02:22 PM
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Not rocket surgery.. 201 has a 5V 1A filament, 201A is 5V .25A. So, (assuming a standard 5 tube radio) you'd need 5A capable supply form running 201's, or 1.25A capable supply to run the 201A's. You might try swapping the tubes to different positions and check performance. We used to put the weakest tube in the "detector" position.
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