> Any opinions on this modification to the AL1500?
>
> http://techcomnetworks.com/ve2jka/forum/showthread.php?t=177
I certainly would never do that mod. First, that series of
amps takes cool air in across the electrolytics and then
across the transformer. His mod will kill the airflow across
the sensitive electrolytics.
Second the airflow out through just a few top holes will be
far too restricted. The airflow is already set at the
minimum possible airflow to keep tube seals below rated
temperature at the rated duty cycle.
My bet is he never measured anything and is just "guessing"
things are OK.
73 Tom
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