Dave wrote:

...
my formula is a little more complicated than the web site though. i take
the distance from the shack to the antenna, add in the width of the shack
(assuming some day i'll move the radio that it connects to somewhere else),
then add a couple feet more just for good measure.



Absolutely, I had overlooked that error myself ...

If you notify "him" of that error/bug, I should imagine he would
immediately incorporate your "upgrade!" :-)

Regards,
JS