Skip to main content

Replies sorted oldest to newest

I suspect making the heatsink with the exact right dimensions would be the only tricky part.  Of course, soldering to the tabs of the FET's without killing them with heat is somewhat tricky as well, I always had issues trying to solder the heatsinks back onto the older 5V PS/2 boards.  Interestingly enough, the 3V PS/2 boards never sported heatsinks on the motor driver FET, not sure why this one was added.

There was a large batch of 3/2 boards intended for G-gauge using the remotely mounted bridge rectifier.  They were modified to move the rectifier to the board for use in O gauge and Tinplate, however the rectifier on some boards was set too deep into the PCB so the heat sink has to modified to properly fit when mounted to a chassis. (No, I didn't do this, but I know who did).

The G gauge 3/2 boards have a heat sink on the FETs and a remotely mounted rectifier (so it can be attached to a BF heatsink in the loco).  The boards were modified to mount the rectifier on the PCB for use in O and Tinplate.  The modified heat sink I was talking about is the bracket that attaches to the rectifier.  It may not fit correctly because the rectifier is set too deep in the PCB.

Last edited by Jon G

Add Reply

Post
The DCS Forum is sponsored by
OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
330-757-3020

www.ogaugerr.com
×
×
×
×
Link copied to your clipboard.
×
×