New heatsinks not touching chip surface and fall of again.

  • 1
  • Problem
  • Updated 2 years ago
I executed the heatsink modification according instructions.
The 2 old ones were both lying on the bottom.
Then I glued the new ones on top of the chips and pressed gently. Done?
I started to close the case but suddenly one of the heatsinks fell of again!
After closely investigating I noticed that some surrounding SMD parts are (L2, L3, C11) higher then the surface of the chip! In other words it is not possible to mount the heatsink in such a way that it touches the chip.
The only solution is to cut the new heatsink to fit the chip.
Do I have different pc boards or why did not anybody else has this problem? What I‘m doing wrong?
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Chris de Voogd

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Posted 2 years ago

  • 1
Photo of Manuel Maseda

Manuel Maseda

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The new heatsinks go on the back of the board, not on top of the chips.
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Chris de Voogd

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Stupid me, thanks.
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Albert PA0A

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Art - N4QNT

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Please watch this How-To Video>>>>>>>>
Photo of WX7Y


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The pictures on the included instruction sheet show the proper placement of the heat sinks on the back of the Circuit board. 
Photo of rjguidrysr


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completed in 15 minutes, takes more to get those 14 little screws out and back.
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No hams read instructions we already know everything :-)
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Gary L. Robinson

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Some of us hams do read the instructions ...  but ONLY years later hihi

---Gary WB8ROL
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Jay / NO5J

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Which is how hams find out what they don't know, but should. 

And might not remember next time.

#FlexRadio IRC chat

   73, Jay - NO5J