CALNNC: I have quite a lot of very early PS1 loco's (mainly diesel), and have never seen any resister inline in the battery lead.
Does you PS1 board have all of the feed wire leads soldered directly to the bottom board, or does it have the Molex plug connections?? Real early boards had every wire soldered.
Been running BCR's in all my PS1 and PS2 loco's since I have owned them (years now) with no problems what-so-ever. Only problem using a BCR in the very early PS1 loco's is you have to start at 10V for one minute to fully charge the BCR, and then throttle down very slowly to get the board out of the "reset" mode.
Sometimes I have to shut them down completely after the one minute charging time, and start them up again at only 5V, to get them out of "reset" and moving forward.
A photo of the inline resister would be interesting.
Peter.....Buco Australia.
