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Old 28th September 2009, 08:14 PM   #21
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Magura when soldered to a copper block like you used do you have any idea what the
thermal resistance case to sink will be.
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Old 28th September 2009, 08:18 PM   #22
Magura is offline Magura  Denmark
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Quote:
Originally Posted by woody View Post
Magura when soldered to a copper block like you used do you have any idea what the
thermal resistance case to sink will be.
No, but it's low.

Before I used this method, one of my "test the limits" setups, would send the temp of the JFET up on the wrong side of 150C. With the copper block, it's below 100C, and (embarrassing, I know) limited by the capacity of the heat-sink.


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Old 5th October 2009, 11:29 PM   #23
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I have silver solder. Do I need anythink but the blank copper and a powerful solder iron???
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Old 5th October 2009, 11:33 PM   #24
sts9fan is offline sts9fan  United States
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I just drilled and tapped two holes flanking the fet. Then cut a small length of aluminum and screwed it down with a silpad under the fet.
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Old 6th October 2013, 02:01 AM   #25
udailey is offline udailey  United States
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So did an amp different than a zen variant ever come of this?
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