[R-390] Fan for 390

[Dan Merz]

Hi,  thanks to Roy Morgan for the fan/plate design for the 390 for cooling
the 6082's.  I finally put it together and it fit perfectly from the
template he provided.  I ended up cutting the whole center section out after
putting the three matching holes in, mostly because it was easier than
filing the holes bigger from the 1 3/8 hole I cut.  I used a 92 x 25 mm fan
from Mouser, which is an inch thick,   120 volt version.  Next time I'd use
a 220 volt.  I dropped the speed on mine by putting 1250 ohm resistor  in
series in a small box and the noise was reduced adequately. Another good
idea from this group,  thanks.  Dan