On Sat, 15 Jan 2011 10:08:28 -0600, the renowned Ignoramus25553
wrote:

On 2011-01-15, wrote:
On Jan 15, 10:01?am, Rich Grise wrote:
Personally, I like as much surface
area as I can manage; forced-air cooling (like a fan) helps a LOT, but
unless it's a great big huge heatsink, you should mount some kind of guard
so that nobody gets their hand burned.
The heat sink ought to be big enough that no guard is needed. If the
heat sink is hot enough to burn someone, the silicon junction is
probably shot.

While I kind of agree with all that, the lathe would be unlikely to be
pulling 12 amps at 190 volts continuously. Anyway, aluminum plates are
inexpensive (www.speedymetals.com), and a 1/4" thick 8x12" plate can
be had for $8.86. That is far more than necessary.

i

Yup, and in the spirit of reasonable excess for cheap, I'd suggest
picking up one or two of these babies for $2.35 each quantity 1.

http://www.mouser.com/ProductDetail/...Qyol7c n1I%3d



Best regards,
Spehro Pefhany
--
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