Mounting LU1014D - Page 3

woody · 28th September 2009, 08:14 PM

Magura when soldered to a copper block like you used do you have any idea what the
thermal resistance case to sink will be.

Magura · 28th September 2009, 08:18 PM

Quote:

Originally Posted by woody

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.

Magura

HVfanatic · 5th October 2009, 11:29 PM

I have silver solder. Do I need anythink but the blank copper and a powerful solder iron???

sts9fan · 5th October 2009, 11:33 PM

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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28th September 2009, 08:14 PM	#21
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	Magura when soldered to a copper block like you used do you have any idea what the thermal resistance case to sink will be.

5th October 2009, 11:29 PM	#23
HVfanatic diyAudio Member Join Date: Feb 2008	I have silver solder. Do I need anythink but the blank copper and a powerful solder iron???

5th October 2009, 11:33 PM	#24
sts9fan diyAudio Member Join Date: Apr 2006 Location: MA	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.