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Old 21st July 2010, 12:52 PM   #521
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Quote:
Originally Posted by lineup View Post
TO3 and temp coefficient 0.7 C/W makes them specially suited for hot, hot Class A
You forgot the more important part, max junction temperature of 200C instead of 150W.
Means a Motorola TO3 still handles 62.5W dissipation at 150C, while most other output devices dropped to Zero !

0.70 C/W= (200C-25C)/250W
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