Don (W3FPR) recently wrote ...
"why does still air have to be in quotes?"
Hi Don,
That was done so the wording "in still air" wouldn't seem like a
grammatical error. More importantly, here's an excerpt from a recent email
from Adrian, addressing your inquiry regarding ambient temperature:
"The ambient temperature was constantly monitored on the test bench by the
transceiver using a very sensitive aviation anemometer. This instrument can
measure airflow down to fractions of a knot, and does so by monitoring
temperature changes of a heated thermistor, as well as using a ducted fan
whose speed is measured via a pulse-counting technique for higher speeds. I
managed to keep the ambient temperature stable throughout the test to within
an indicated 0.5 degree C, so I was quite pleased with the actual test
results."
--- - - - ---
I certainly could have included details like this in the final report,
but tried to avoid providing too much information, and also tried to limit
the document to two pages without resorting to a tiny font. More
importantly, IMHO Adrian's test environment and methodology were sufficient
for his intended objective, which was to compare the performance of the
various aftermarket offerings to one another, for the purpose of ranking
them. Yes, higher resolution temperature measurements would have made the
results more meaningful; but that evaluation is left as an exercise for the
reader.
BTW, check out http://www.ve7fmn.ca/faqs/#about_testing for a
description and photo of the setup Adrian had used for his original
comparison of the factory/stock heatsink and his Cooler KX(TM) Lite, which
used an entirely different methodology.
73,
Gary KI4GGX
webmaster http://www.ve7fmn.ca/
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