[Moon-net] Ericsson 2.3 GHz SSPA

[Edward Cole]

At 04:18 AM 10/9/2007, Trevor Benton wrote:
>Hi - I will be  using an Ericsson SSPA & was wondering how others
>using this unit are cooling it?
>I was thinking of completely enclosing the heat sink finned area & force
>air through with a tube type blower.
>The amplifier will be run with a cw duty cycle.
>Any comments would be appreciated & tnx for your time.
>
>   73`s, Trevor,  VK4AFL.

Trevor,

I don't have the Ericsson PA, but do run my RFC 170w PA on JT65 which 
is 100% duty cycle (much harder than CW).  To keep from overheating 
the PA I placed one of the 4-inch square "muffin" fans right on top 
of the heat sink fins.  With the fan running the PA nevers feels even 
warm.  I thought to make an aluminum plate with ears to sit over the 
top of the fins with hole for the fan to better cool the PA.

MY guess that would cool even better and your PA probably will not 
require a tube blower but only a fan like mine (maybe bigger diameter 
if you are worried).


73,
Ed - KL7UW
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