[Amps] FW: Re: Heatsinks for SSPAs - Newbie Questions and UK source

[Mike Tubby]

Can I suggest the following hearsink options for SSPAs:

1. Copper spreader plates can be obtained from Bert, PE1RKI, for example:

        http://members.chello.nl/b.modderman/MRFE6VP61K25HR5.html

    that's both for traditional aluminium heatsinks and for water
cooling - see the pics

2. Try Birmingham Aluminium (UK) for their HS1850 which they hold in
stock.  If you want something designed for fans then Fischer Eletronik
(Germany) have the LAV-11 range.

Mike G8TIC




On 01/03/2013 22:38, peter chadwick wrote:
> ========================================
> Message Received: Mar 01 2013, 10:36 PM
> From: "peter chadwick" 
> To: "Bill Turner" 
> Cc: 
> Subject: Re: [Amps] Heatsinks for SSPAs - Newbie Questions and UK source
>
> Heat only rises in air, where it heats the air and makes that rise.
>
>
>
>
>
> ========================================
> Message Received: Mar 01 2013, 10:14 PM
> From: "Bill Turner" 
> To: "Amps" 
> Cc: 
> Subject: Re: [Amps] Heatsinks for SSPAs - Newbie Questions and UK source
>
> Just thinking about heatsinks for homebrew SS rigs. Here's an idea, maybe
> a bit in-elegant but I bet it would work like a champ.
>
> Use a conventional aluminum chassis and mount the transistors on the bottom
> side flip it over and fill it with water. Don't laugh. Just put the bottom
> (now the top) cover on it and seal everything up with RTV silicone. Put
> some hose fittings on it, one for inlet and one for outlet . I'll leave
> that part up to your imagination. Hint: thermal switch with an external
> valve for the water. 
>
> You want the transistors on the bottom because heat rises. 
>
> Haven't tried it myself but I bet it would dissipate anything you could
> throw at it and no fan noise either. 
>
> Thoughts?
>
> Bill, W6WRT
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