On Mar 2, 3:46*pm, "(PeteCresswell)" wrote:


I'll have a little bridge rectifier and voltage regulator serving
a bicycle hub alternator (6v 4w) and want to use the bike frame
as the heat sink. * *

If there's a brazed boss in some convenient spot, you can screw a
block of aluminum to that (or even a 1" square plate). The rectifier
won't need conduction cooling at these power levels, so it's just
the (three terminal TO-220?) regulator or pass transistor that gets
warm.

Generator mount bracket or headlamp bracket are good candidates.
If they get warm, it sinks to the frame quick enough.