Kirk Wallace wrote: > On Sun, 2008-06-08 at 01:21 -0500, Jon Elson wrote: > ... snip > >>Your last order of servo amps may be included in this batch. >>If the power transistors say "FB260" on them, they need the fix. >>If they say "31N20D" then they don't. >> >>Jon > > > My amps have FB260's. Should I put some caps on them? >
If you are truly a masochist, there are two places on the bottom of the PC board that have no component there. You should place 100 pF 0805 capacitors in those two locations. You have to take the 4 screws out of the transistors and then the 4 screws that hold the board in place. You then have to reassemble it, with the thermal conductive insulators under the transistors, and the plastic step washers and plain washer on top. And, if you don't want to perform this surgery, you can send them to me any time you are not needing them. All of this will make the amp a bit more stable, but it probably won't have much effect on the heating problem. Jon ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
