Re: [Amps] liquid cooling

["Paul Christensen" <w9ac@arrl.net>]

>> Convection vapor cooling in small amps normally uses a vented system and 
>> as
>> such, H2O is exposed to the ambient air

> Only to a small extent.

It's a small extent until air contamination gradually reaches the point 
where conduction necessitates the purging of the H2O supply.

> You should not see any humidity escape the system except possible a small 
> amount at startup.

There's a slight amount of evaporation through the vent tubes (at the supply 
line) as both the pre and post condenser H2O temperature rises.   It's a 
small amount of evaporation that occurs over time and the amount of 
evaporation is directly related to operating time.  Unless I am running the 
amp extensively, I can usually wait until the 12 month maintenance period 
has lapsed.  Only on a few occasions have I needed to "top off" the 
reservoir in between maintenance points.

Paul, W9AC

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