Donii@sympatico.ca writes:
>
> When the transmitter was turhed off a simple $5 110v
> automotive engine block heater would have kept things
> from freezing.
Not in that transmitter ... the cooling system contained
about 100 gallons each. The transmitter was in an unheated
building, the reservoirs were stainless steel and uninsulated,
the pipes were uninsulated copper and the heat exchangers had
several thousand square feed of effective area.
At zero degrees Fahrenheit or below, the block heater would
have needed to be several KW and auxiliary pumps would have
been needed to move the warmed water through the exchangers
to keep them from freezing.
It isn't an issue these days since most commercial stations
never sign off but 15 or 20 years ago, a lot of stations
went dark between midnight or 2 AM and 6 AM local.
73,
... Joe, K4IK
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|