Jim,
Plain ol' distilled water will remove heat a lot better than diluting it
with glycol, however the chemistry may dictate using it. Deionized water
is much more corrosive than distilled even if it starts life as a very poor
conductor, but will quickly leech metal ions into the solution (although
not much volume!) and will likely become more conductive faster than
starting with plain distilled, but it might be a photo finish as to which
needs to get replaced first. Just an FYI, and I hope this has a slightly
beneficial SNR. If not, I apologize for taking up the space.
-Bob N3XKB
On Tue, Oct 8, 2019 at 10:22 AM Jim Barber <barberaudio@gmail.com> wrote:
> I'm laying out a 2-module MOSFET amp, and intend to use liquid cooling.
>
> The last time I visited the topic, ethylene glycol antifreeze diluted with
> the traditional 50% deionized water was the coolant of choice.
>
> Anything new under the sun? I'm using propylene glycol in my laser tube
> and CNC spindle coolers, but those don't have to be very efficient. The
> cooling system for the amp is going to have to move some heat.
>
> Thanks,
> Jim N7CXI
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