At 01:35 PM 6/4/2005, Alexander Tubonjic wrote:

> > > >The first thing that comes to mind is how to dealing with the
> > > >condensation created during the heating and cooling of the
>refridgerant.
> > >
>
>   What if you were to place the radio vertical with the heatsink
>facing the ground and place a drip pan under the radio? Condensation
>on the heatsink shouldnt effect the performance of the radio? Same for
>the power supply, just mount it upside down with the heatsink facing
>the ground.

It all depends on where the condensation can get to.
What happens when the repeater is idle for a while, and then the 
whole unit goes below the dew point.
:-P

Passive water cooling makes sense to me.
We're looking at a 100W UHF system here, that I just might use it on.

Similar setup to existing systems, I won't run the water pump 24/7, 
I'll turn it on after the repeater has been keyed up for 30 sec or 
so, and then shut it down after a few minutes of idle, along with the 
cooling fans. Pull a slight vaccum in a static tube that runs up 
above the system, and then any leaks pull air in, not let water out. 
The drop in vaccum triggers an alarm.

For an inaccessible site, I think it's probably a bad idea though, at 
least with current technology.







 
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