[hpsdr] Munin Enclosure

[Ken Shutt]

Thanks to everyone for your comments.  As I expected, no one likes my 
proposed approach (see my original post).

Installing the heat sink inside the Pandora enclosure as suggested by Kjell 
seems like a better alternate.  That is the way I installed Pennywhistle on 
my current system.  I was afraid it might not work well for the higher power 
Munin amp.

73 de Ken W5KQ


-----Original Message----- 
From: Kjell Karlsen
Sent: Tuesday, October 01, 2013 2:20 AM
To: hpsdr at lists.openhpsdr.org
Subject: Re: [hpsdr] Munin Enclosure

***** High Performance Software Defined Radio Discussion List *****

Hi All.

I agree with Helmut.

But if you cut a hole in Pandora for the copper spreader and install it
directly to the outside heat sink, the heat transfer will be better as
normally the sink has a more flat surface than other aluminum.

Make the outside heat sink as large as possible if you will avoid using a
fan.

I have installed Munin and the heat sink inside Pandora but I use a
temperature controlled fan blowing through the sink. The sink I used was
one I had in the scrap collection, do´nt know the PN.

73, Kjell





På Tue, 01 Oct 2013 08:11:18 +0200, skrev Helmut, DC6NY <dc6ny at gmx.de>:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Ken,
>
> I would not recommend that. It's a very bad thermal transition. Even the 
> the
> transistion copper spreader to standard aluminium heatsinks is not 
> without
> issues. Make the absolute flatness of both parts sure.
>
> 73, Helmut, DC6NY
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: hpsdr-bounces at lists.openhpsdr.org
> [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Ken Shutt
> Gesendet: Montag, 30. September 2013 23:39
> An: hpsdr at lists.openhpsdr.org
> Betreff: [hpsdr] Munin Enclosure
>
> ***** High Performance Software Defined Radio Discussion List *****
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