[hpsdr] Munin heat sink and spreader

[AA8K73 GMail]

Thanks Mike.  From the company's datasheet:

PENETROX® oxide-inhibiting compounds produce low initial contact 
resistance, seal out air and moisture, prevent oxidation or 
corrosion, exhibit superior weathering characteristics, are 
usable over wide temperature ranges, and provide a high 
conductivity "gas-tight" joint.

All PENETROX® compounds contain homogeneously suspended metal
particles. The suspended metal particles assist in penetrating 
thin oxide films, act as electrical "bridges" between conductor
strands, aid in gripping the conductor, improve electrical 
conductivity and enhance the integrity of the connection.


I'm thinking that if I file the heat sink flat, it should mate 
with the flat copper spreader.  The spreader is very good; I can 
read text in its reflection and there is no distortion.

When I file the heat sink, it will be rough.  How to smooth it? 
  400 grit sandpaper?  Kitchen scouring powder?  I don't want to 
leave lots of little valleys.


Mike - AA8K


On 10/09/2013 10:42 PM, Mike Culver wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Not 100%, but isn't Penetrox for aluminum wire joints? It's a great anti-oxidant but not a great heat transfer agent.
>
> I'd vote for filing in order to address the concave issue.
>
> Mike
> WA9QHP
>

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