Gary writes:
>
> While the "water wetter" may lower the overall coolant
> temperature they do not address what happens to the hot
> spots. They suggest raising the cooling system pressure.
> That tells you that the hot spots are still a problem.
To bring this back to water cooled tubes ... one can't raise
the pressure for two reasons. The systems are generally
run unpressurized and there is still a limit to the safe
temperature for the seals.
Typically, water cooled tubes - at least those I used in
the TV transmitters want to stay below 180 degrees or so
at the anode outlet.
73,
... Joe, K4IK
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